Download (2013) Evidence of multiple carbon sources and prey communities

Dr. Jeffrey M. Welker
Fulbright Distinguished US Arctic Chair, Norway
Professor of Ecology
Department of Biological Sciences
University of Alaska Anchorage
3211 Providence Drive, EBL 117 ▪ Anchorage, AK 99508
907-786-6110 ▪ [email protected]
EDUCATIONAL BACKGROUND
Ph.D. Department of Rangeland Ecology and Management, Texas A&M University, College Station, TX,
1985. Carbon and nitrogen cycling in native bunchgrass plants.
M.S.
Range Science, Range and Animal Science Department, Montana State University, Bozeman, MT,
1982. Climate change effects on prairie vegetation.
B.S.
Agriculture-Range Science Major, Range and Animal Science Department, Montana State
University, Bozeman, MT, 1980.
PROFESSIONAL EXPERIENCE
Academic Appointments
Fulbright Distinguished US Arctic Chair-Norway, March 2012-present
Professor of Biological Sciences, University of Alaska Anchorage, August 2004-present
Director, Environment and Natural Resources Institute (ENRI), University of Alaska Anchorage, August
2004-2012
Director, ENRI Stable Isotope Laboratory, 2005-2012
Sr. Research Scientist, Natural Resource Ecology Laboratory, Colorado State University, 2001-2004
Associate Professor, Department of Renewable Resources, University of Wyoming, 1996-2001 (Tenured
2000)
Research Scientist, Natural Resource Ecology Laboratory, Colorado State University, 1993-2001
Senior Scientific Officer, Institute of Terrestrial Ecology, Merlewood Research Station, Cumbria, England,
Natural Environment Research Council, UK, 1990-1993
Research Assistant Professor, Department of Agronomy and Range Science, University of California, Davis,
1988-1990
Post-doctoral Research Associate, Department of Agronomy and Range Science, University of California,
Davis, 1986-1988
GRANTSMANSHIP
(42 awards, total exceeding $18,000,000)
1.
Beard, K., Welker, J. M. and Leffler, J. (2013) Collaborative Research: Tropic mismatch between
geese and wet sedge tundra. National Science Foundation, Office of Polar Programs, $1,277,065.
1
2.
Welker, J. M. and Spalinger, D. (2012) Comparative ecology of caribou heards across Alaska:
Collaborations between USFWS Land Conservation Consortiums. USGS Alaska Climate Science
Center, $59,988.
3.
Welker, J M., Cable, J., and Cherry, J. (2012) EAGER-Collaborative Research: Quantifying changes
in the Arctic hydrological cycle at the landscape scale using advances in water vapor isotope (18O and
D) techniques and aircraft. National Science Foundation, Office of Polar Programs, $288,000.
3.
Post, E., Sullivan, P. F., Welker, J. M., and Eissenstat, D. M. (2011) Collaborative Research: Linking
belowground phenology and ecosystem function in a warming Arctic. National Science Foundation,
Office of Polar Programs. $1,300,000.
4.
Gonzalez-Meler, M., Sturchio, N., Welker, J. M., and Filley, T.R. (2011) Permafrost thawing and
vegetation change and effects on cryoturbation rates, CO2 and CH4 processes. Department of Energy,
Terrestrial C cycle Research Program. $1,010,000.
5.
Spalinger, D. E., Welker, J. M., Sullivan, P. F., and Collins, W. (2011) The Tundra in Transition:
Unraveling the Dynamics of Western Alaska Caribou – Tundra Ecosystems. USFWS LCC program.
$200,000.
6.
Campbell, R., Welker, J. M., Crusius, J., Gasso, S., Schroth, A., and Thomas, A. (2010) Melting ice,
habitat change and nutrient flux: Hydrological, biogeochemical and biological linkages between the
Copper River watershed and the coastal Gulf of Alaska. NASA. $1,388,000.
7.
Welker, J. M., Buck, C. L., van Tets, I. G., Burns, J. M., and Cable, J. (2009) MRI Acquisition:
Detecting and monitoring changes in the arctic using stable isotope techniques: A facility that
contributes to IPY, NEON and beyond. NSF Major Research Instrumentation. $588,000.
8.
Oberbauer, S., Welker, J. M., Sullivan, P. F., Tweedie, C., and Hollister, R. (2008) Collaborative
Research: Sustaining and amplifying the ITEX AON through automation and increased
interdisciplinarity of observations. NSF Office of Polar Programs, Arctic Observing Network.
$1,233,000.
9.
Czimczik, C. I., Welker, J. M., Sullivan, P. F., and Schimel, J. (2008) Processes governing the ages
(14C) and magnitudes of ecosystem respiration in the High Arctic. NSF Office of Polar Programs.
$1,250,000.
10.
Cable, J., and Welker, J. M. (mentor). (2009) The consequences of permafrost degradation on plantwater use strategies. NSF Office of Polar Programs, Postdoctoral Fellowship. $208,000.
11.
Hagedorn, B., Perry, M., Spalinger, D. E., and Welker, J. M. (2008) Enhancing Research and
Education at the University of Alaska Anchorage with a state-of-the-art Liquid Chromatograph-Ion
Trap Mass Spectrometer. NSF Major Research Instrumentation. $411,000.
12.
Welker, J. M., Sveinbjörnsson, B., Sullivan, P. F. (2006) Mechanisms and feedback consequences of
shrub expansion following long-term increases in winter snow depth in northern Alaska: a legacy for
IPY. National Science Foundation, Office of Polar Programs. $622,000.
2
13.
Welker, J. M., Sveinbjörnsson, B., Sullivan, P. F., and Boggs, K. (2006) IPY: Collaborative Research:
Study of arctic ecosystem changes in the IPY using the International Tundra Experiment. NSF Office
of Polar Programs. $257,000.
14.
Welker, J. M., Sveinbjörnsson, B., Peterson, K., Olsson, P., Boggs, K, and Carlson, M. (2005) The
UAA Boreal Forest Environmental Observatory (BFEO): A campus-based education and research
platform that engages undergraduates and strengthens national funding competitiveness. UAA
Enhancement Fund. $130,000.
15.
Welker, J. M., Wipfli, M., and Rinella, D. (2005) UAA & UAF Collaborative Research: Comparative
marine-terrestrial nitrogen linkages in streams of the Kenai Peninsula. UAA’s Chancellor’s Fund.
$24,500.
16.
Welker, J. M., Hallet, B., Sletten. R., Schimel, J., and Fahnestock, J. T. (2002) Coupling of carbon and
water cycles in a cold, dry ecosystem: Integrative physical, chemical and biological processes and their
controls on CO2 exchange. National Science Foundation, Biocomplexity in the Environment.
$1,700,000.
17.
Welker, J. M., and Fahnestock, J. T. (2001) Mixedgrass Prairie Responses to Simultaneous Increases
in Winter Snow Depth and Changes in Summer Rainfall: C, N and H2O dynamics. National Institute of
Global Climate Change, Great Plains Region, Department of Energy. $360,000.
18.
Welker, J. M., Vance, G., Stahl, P. D., and Fahnestock, J. T. (2001) Controls of C sequestration on
Northern Rocky Mountain Rangelands. USDA-NRI. $180,000.
19.
Welker, J. M. and White, J. (2000) Isotopic (18O & D) characteristics of precipitation across the U.
S.: Temporal patterns and controlling processes. National Science Foundation, Earth System History
Program. $465,000.
20.
Lockwood, J., Welker, J. M., and Kazmer, D. (2000) The Pied Piper IPM Strategy: Attracting
rangeland grasshoppers with plant oils. USDA CSREES. $200,000.
21.
Welker, J. M., Fahnestock, J. T., and Bilbrough, C. J. (1999) Species responses to changes in climate
across arctic gradients using the North American ITEX network (NATEX): influences on community
and ecosystem processes. NSF Office of Polar Programs. $475,000.
22.
Molau, U., Henry, G., and Welker, J. M. (1998) Climatic impacts on annual growth and physiology in
Cassiope tetragona. Swedish Royal Academy of Science, Polar Directorate, Tundra Northwest
Expedition 1999. $150,000.
23.
Welker, J. M., Poulson, S. Smith, W. K., Drever, T., Jackson, S. (1998) A stable isotope facility to
study terrestrial processes and their interactions with climate and the environment. National Science
Foundation, Major Research Instrumentation. $335,000.
24.
Welker, J. M., Fahnestock, J. T., and Jones, M. H. (1997) Winter C flux in arctic ecosystems under
changing climate: Effects of soil carbon and active layer dynamics. NSF Office of Polar Programs.
$450,000.
3
25.
Smith, W. K., Kelly, R. D., Welker, J. M., Hunt, E. R., and Reiners, W. A. (1997) Quantification of
carbon sources and sinks for northern plains and mountain landscapes using simultaneous aircraft,
tower and leaf measurements of CO2 and H2O vapor flux and stable isotopes. National Science
Foundation, Joint Program on Terrestrial Ecology and Global Climate Change (TECO). $1,200,000.
26.
Jackson, S. E., and Welker, J M. (1997) Aquatic plant cellulose isotopic abundances as a climate
proxies. Earth System History, Short-term Grant for Exploratory Research (SGER), National Science
Foundation. $49,000.
27.
Jackson, S. E., and Welker, J M. (1997) Vegetation and stable isotopes as paleoclimate proxies.
Faculty grant-in-aid program, Office of Research, University of Wyoming. $5,000.
28.
Schimel, D., Kelly, E., Welker, J. M., Elliott, T. and Valentine, D. (1994) A stable isotope facility to
study atmosphere-biosphere interactions. National Science Foundation, Major Research
Instrumentation. $255,000.
29.
Welker, J. M. (1994) Comparative responses of moist and dry tundra to altered snow cover and
warmer summer temperatures. NSF Office of Polar Programs. $700,000.
30.
Welker, J. M. (1994) International Tundra Experiment, (ITEX) Travel Supplement. NSF Office of
Polar Programs. $16,000.
31.
Welker, J. M. (1995) Winter CO2 flux in Arctic systems. NSF Office of Polar Programs. $96,000.
32.
Singer, F., Welker, J. M., Coughenour, M., Valentine, D., and Elliott, T. (1994) Ungulate-plant
interactions in 5 Rocky Mountain National Parks, National Biological Survey, United States Geological
Survey. $800,000.
33.
Callaghan, T. V. and Welker, J. M. (1992) Interactions between species at community boundaries in
the uplands: responses to simulated changes in climate and the environment. The Initiative for Global
Environmental Research (TIGER), Natural Environmental Research Council, U.K. $375,000.
34.
Callaghan, T. V., Press, M. C., Lee, J. A. and Welker, J. M. (1991) Arctic ecosystems and Climate
Change. Natural Environmental Research Council, U.K., Arctic Special Topic. $400,000.
35.
Welker, J. M. (1991) Ungulate use of winter ranges in the High Arctic. The British Council, England.
Travel Grant to Canada. $2,000.
36.
Welker, J. M. (1991) Studies in arctic and alpine ecophysiology. The British Council, Travel Grant,
England. Travel Grant to Switzerland. $2,000.
37.
Welker, J. M. (1991) Correlation between D and 13C in Arctic clonal plants: A retrospective
analysis of climate and physiological isotopes. Natural Environmental Research Council/Isotope
Geosciences program. $30,000.
38.
Rice, K. J., and Welker, J. M. (1990) Ecological genetics of blue oak responses to drought and
herbivory. University of California Integrated Hardwood Range Management Competitive Grant
Program. $85,000.
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39.
Demment, M., Jones, M., Rice, K. J., Welker, J. M. (1989) Sustained plant and animal productivity in
grass-clover ecosystems of California. University of California Sustainable Agriculture Competitive
Grant Program. $130,000.
40.
Rice, K. J., Welker, J. M., and Menke, J. W. (1987) Ecology and regeneration of Hardwood
Rangelands: The influence of water, herbivory and competition on stability, productivity and
management options. University of California Integrated Hardwood Range Management Competitive
Grant Program. $150,000.
41.
Menke, J. W., and Welker, J. M. (1986) Ecological limitations to sustained production on woodland
and savanna ranges. USDA Rangeland Resource Competitive Grant Program. $77,000.
42.
Welker, J. M. (1981) Grassland responses to supplemental water: Effects on domestic animal forage
digestibility. Montana State University Research Creativity Program. $1,000.
PUBLICATIONS (125)
Research Gate score=38.87
2012 & 2013 only
1. Lupascu, M., Welker, J. M., Seibt, U., Xu, X., Lindsey, D. S., Czimczik, C. I. (2013). The magnitude,
seasonality and sources of CO2 emissions in a High Arctic polar semi-desert in NW Greenland are controlled
by precipitation in puts and soil water conditions. Nature Climate Change (in press).
2. Pattison, R., and Welker, J. M. (2013) Differential ecophysiological response of deciduous shrubs and a
graminoid to long-term snow reductions and additions in moist acidic tundra, Northern Alaska. Oecologia
(in press).
3. Causey, D., Bargmann, N. A., Burnham, K. K., Burnham, J. L., Padula, V. M., Johnson, J. A., and
Welker, J. M. (2013) Biogeochemical indicators in High- and Low-Arctic marine and terrestrial avian
community changes: Comparative isotopic (δ13C, δ15N) studies in Alaska and Greenland. Marine Biology (in
press).
4. Healey, N. Oberbauer, S., Ahrends, H. , Dierick, D., Welker, J. M. et al. (2013) A Mobile Instrumented
Sensor Platform for Long-term Terrestrial Ecosystem Observation: A Case Study in the Arctic. J of
Environmental Informatics (in press).
5. Liu, Z., Bowen, G., Yoshimura, K., and Welker, J. M. (2013) Pacific North American teleconnection
controls on precipitation isotopes (δ18O) across the contiguous USA and adjacent regions. J. Climate
doi:10.1175/JCLI-D-13-00334.1.
6. Oberbauer, S. F., Elmendorf,, S. C., Troxler, T., Hollister, R. D., Welker, J. M., et al. (2013)
Phenological responses of tundra plants to background climate variation tested using the International
Tundra Experiment (ITEX) Proceedings of the Royal Academy 8 025023.
5
7. Zeno, F., Siegel, D., Soumitri, S., Dasgupta, D, Glaser, P., Welker, J. M. (2013) Stable isotopes of peat
pore water show seasonal recharge vertically penetrates both circumboreal bogs and fens. Hydrological
Processes 10.1002/hyp.9983.
8. Cable, J., Olge, K., Bolton, D., Bentley, L., Romonvsky, V., Iwata, H., Harazona, Y., and Welker, J. M.
(2013) Permafrost thaw effects boreal deciduous plant through increased soil water, increased thaw and
warmer temperatures. Ecohydrology DOI: 10.1002/eco.1423.
9. Leffler, J. and Welker, J. M. (2013) Long-term increases in snow elevate leaf N and photosynthesis in
Salix arctica: response to a snow fence experiment in NW Greenland. Environmental Research Letters 8,
025023
10. Schaeffer, S. M., Sharp, E., Schimel, J. and Welker, J. M. (2013) Soil N processes in the High Arctic:
Responses to a long-term multi-level warming and added summer water experiment. Global Change Biology
DOI: 10.1111/gcb.12318.
11. Sharp, E., Sullivan, P., Steltzer, H., Csank, A., and Welker, J. M. (2013) Complex carbon cycling
responses to multi-level warming and supplemental summer rain in a High Arctic ecosystem. Global Change
Biology DOI: 10.1111/gcb.12149.
12. von Biela, V. R., Zimmerman, C. E., Cohn, B. R., and Welker, J. M. (2013) Evidence of multiple carbon
sources and prey communities in young-of-the-year Arctic cisco (Coregonus autumnalis) using 13C, 15N
and diet analyses. Polar Biology 36: 137-146.
13. Tape, K. D., Hallinger, M., Welker, J. M., and Ruess, R. W. (2012) Landscape heterogeneity of shrub
expansion in Arctic Alaska. Ecosystems doi:10.1007/s10021-012-9540-4.
14. Elmendorf, S., Henry, G. H. R., Hollister, R. D., Welker, J. M. et al. (2012a) Plot-scale evidence of
tundra vegetation change to recent summer climate warming. Nature Climate Change. 2: 453-457.
doi:10.1038/nclimate1465.
15. Elmendorf, S., Henry, G. H. R., Hollister, R. D., Welker, J. M., et al. (2012b) Global assessment of
experimental climate warming on tundra vegetation: Heterogeneity over space and time. Ecology Letters.
15(2): 164-175. doi: 10.1111/j.1461-0248.2011.01716.x.
16. Welker, J. M. (2012) ENSO effects on the isotopic (δ18O, δ2H and d-excess) of precipitation across the
US using a long-term network (USNIP). Rapid Communication in Mass Spectrometery 17: 1655-1660.
17. Van Wilgenburg, S. L., Hobson, K. A., Brewster, K. R., and Welker, J. M. (2012) Assessing dispersal in
threatened migratory birds using stable hydrogen isotope (D) analysis of feathers. Endangered Species
Research. 16: 17-29. doi:10.3354/esr00383.
18. Kikuchi, C., Ferre, T. P., and Welker, J. M. (2012) Groundwater-surface water interactions in an
Alaskan freshwater stream. Journal of Hydrology. doi:10.1016/j.jhydrol.2012.04.002.
19. Werner, C., Welker, J. M., et al. (2012) Linking carbon and water cycles using stable isotopes across
scales: Progress and challenges. Biogeosciences Discussions. 8: 2659-2719. (Online Journal).
6
20. Cahoon, S. M. P., Sullivan, P. F., Post, E., and Welker, J. M. (2012) Large herbivores limit CO2 uptake
and suppress carbon cycle responses to warming in West Greenland. Global Change Biology. 18(2): 469479. doi:10.1111/j.1365-2486.2011.02528.x.
21. Liu, Z., Bowen, G., Welker, J. M., and Yoshimura, K. (2012) Winter precipitation isotope gradients
(δ18O) of the contiguous USA and their relationship to the Pacific/North American (PNA) pattern. 2012.
Climate Dynamics 10.1007/s00382-012-1548-0.
22. Cahoon, S., Sullivan, P. F., Shaver, G. R., Welker, J. M., and Post, E. (2012) Interactions among shrub
cover and microclimate may determine future carbon budgets. Ecology Letters 15: 1415-1422 doi:
10.1111/j.1461-0248.2012.01865.x.
23. Timling, L., Dahlbert, A., Walker, D. A., Gardes, M., Charcosset, J. Y., Welker, J. M. and Taylor, D. L.
(2012) Distrbution and drivers of ecotomychorrhizal fungal communiteis across the North American Arctic.
Ecosphere 3: 1-25.
Submitted
24. Rogers, M. C., O’Dell, M. B., Peacock, E. L., Simac, K., and Welker, J. M. Isotopic (13C, 15N)
characteristics of Beaufort Sea polar bear tissues and diet: food web ecology of a top predator. Polar
Biology.
25. Wolf, N., Ely, C., Rogers, M. and Welker, J. M. Tundra swan migration ecology: Use of stable isotopes
(15N & D), satellite trackers and N American isoscapes. Canadian J of Zoology.
26. Lupascu, M., Welker, J. M., Xu, X. and Czimczik, C. I. Winter snow depth affects the sources and ages
of CO2 emissions from a NW Greenland High Arctic polar semi-desert. JGR Biogeoscience.
27. Lupascu, M., Welker, J.M., Seibt, U., Xu, X., Velicogna, I., Lindsey, D. S. and Czimczik, C. I. The
amount and timing of precipitation control the magnitude, seasonality and sources (14C) of ecosystem
respiration in a polar semi-desert, NW Greenland. JGR Biogeoscience.
28. Anderson-Smith, A., Sullivan, P. F. and Welker, J. M. Increases in tundra shrub density is manifested in
vegetation spectral properties and corresponds to greater CO2 sequestration. Global Change Biology.
29. Street, J. H., Anderson, R. S., Sessions, A. L., Welker, J. M., and Paytan, A. Late Holocene changes in
North Pacific storm tracks and precipitation moisture sources to the Sierra Nevada, California. Quarternary
Review
30. Liu, Z., Yoshimura, K., Bowen, G. J., Buenning, N. H., Risi, C., Yuan, F., and Welker, J. M. PNA-like
climate teleconnections in continental North America during the mid- and late Holocene epoch. Nature
Communications.
31. Pattison, R., R., Jorgenson, J. C., Raynolds, M. K., and Welker, J. M. Trends in NDVI and tundra
community composition for in the Arctic National Wildlife Refuge, Alaska from 1988 to 2009. Ecosystems.
7
32. Csank, A.,Miller, A., Sherriff, R. L., Berg, E. E., Welker, J. M. Environmental sensitivity of trees killed
during insect outbreaks in south-central Alaska revealed by tree-ring isotope (δ13C & δ18O) chronologies.
Tree Physiology.
Manuscripts under Construction
1. Akers, P. D., Brook, G. A., Welker, J. M. High-resolution, late Quaternary (0-150 ka BP) climate and
vegetation record for the American Midwest: Isotope and pollen evidence from stalagmites and flowstones
in three caves.
2. Anderson, S., Evans, J., and Welker, J. M. Precipitation isotopic analyses (Δ17O & δ15N, NO3-) and
atmospheric modeling advance the understanding of atmospheric nitrogen deposition in the Pacific
Northwest.
3. Baltensperger, A. P., Hüttmann, F., and Welker, J. M. A comparison of the trophic niche space of
Northern red-backed voles (Myodes rutilus) using stable isotopes (δ15N, δ13C, δD, δ18O) along an Alaskan
megatransect.
4. Burnham, J., Burnham, K., Causey, D., Bargmann, N., and Welker, J. M. Mercury in High Arctic sea
and land birds: Using stable isotopes (δ13C, δ15N and δ34S) to understand feeding ecology and contaminant
exposure.
5. Blanc-Betes, E., Gonzalez-Meler, M. A., Sturchio, N. C., Guilderson, T. A., Poghosyan, A., and
Welker, J. M. Methane and CO2 isotope measurements delineate the processes affecting the C emissions in
response to long term increases and decreases in snow, N Alaska
6. Blanc-Betes, E., Gonzalez-Meler, M. A., Sturchio, N. C., Guilderson, T. A., Poghosyan, A., and
Welker, J. M. Long-term winter snow depth changes alter the magnitudes and patterns of CO2 exchange in
moist acidic tundra, transitions in NEE over 20 years.
7. Cahoon, S., Sullivan, P. F., Post, E., and Welker, J. M. Intra and interannal water sources (δ18O and δ2H)
used by grass and shrubs affect leaf-level photosynthetic magnitudes and patterns in western Greenland.
8. Carney, B., Tessler, D., Welker, J. M., Coletti, H. and Causey, D. 15 N and 13C as proxy for diet of
black oystercatchers (Haematopus bachmani) in the northern Gulf of Alaska.
9. Cherry, J. E., Cable, J. M., Cable, W., Worden, J., Crosson, E., Van Pelt, A., and Welker, J. M. Water
vapor isotope measurements over the Alaskan Boreal Forest with aircraft and satellite remote sensing.
10. Csank, A. Z., Miller, A., and Welker, J. M. Tree-ring isotopes reveal environmental perturbations 10
year prior to tree death in Alaska.
11. Csank, A. Z., Birks, J., Edwards, T., Gibson, J. and Welker, J. M. Phases of the Northern Annual Mode
have differential effects on the spatial patterns of precipitation isotope geochemistry across all of North
America: Integrating AKWIN, CANIP and USNIP.
8
12. Csank, A. Z., Czimczik, C. I., Xu, X., and Welker, J. M. Seasonal shifts in the source and age of
riverine DOC and POC in NW Greenland.
13. Delavau, C., Sun, C., Stadnyk, T., McDonald, J., Birks, J., Welker, J. M. Time series modeling of
Precipitation isotopes (δ180) across Canada and the northern United States.
14. Delavau, C., Sun, C., McDonald, J., Birks, J., Welker, J. M., and Stadnyk, T. Use of a stochastic
modeling approach with precipitation isotopes to understand the Fort Simpson Basin, NWT, Canada water
cycle.
15. Ebbs, L., Sullivan, P. F., and Welker, J. M. Long-term added snow result in divergent ecophysiological
responses of evergreen and deciduous shrubs: A stable isotope (δ13C, δ15N and δ18O) study.
16. Flowers, C, Gonzalez-Meler, M. A., Trumbore, S. and Welker, J. M. Warmer temperatures and deeper
snow alter the sources of C used in annual stem and leaf growth: Evidence from 14C analyses in N Alaska.
17. Gonzalez-Meler, M. A. Blanc-Betes, E., Sturchio, N. C., Guilderson, T. A., Poghosyan, A., and
Welker, J. M. Radioisotopes (137Cs, 40K, 210Pb) indicate that cryoturbation processes in Alaskan tussock
tundra are accelerated under deeper winter snow: Results from short and long-term winter snow depth
experiments.
18. Herman, R. L., Cherry, J., Cable, J., Welker, J. M., Noone, D., Sodemann, H. and Worden, J. Aircraft
Validation of Tropospheric Emission Spectrometer Retrievals of HDO and H2O in Arctic and Boreal
landscapes.
19. Klein, E., Nolan, M., Cable, J., Cherry, J. and J M Welker. Continuous water vapor isotopic
measurements indicate differential Arctic storm tracks: Application to McCall Glacier ice core climate
reconstructions in Northern Alaska.
20. Klein, E., Leffler, J., Cable, J., Cherry, J., and Welker, J. M. Sea-ice destroying cyclone leaves a
anomalous water vapor isotope signal along the N Slope of Alaska and in N Canada.
Leffler, J. A., & Welker, J. M. NW Greenland fine-scale summer CO2 exchange from a High Arctic tundra.
21. Levin, N. and Welker, J. M. Variations in the 17O/16O and 18O/16O of meteoric waters from the
conterminous USA.
22. Maseyk, K. S., Welker, J. M., Lett, C., Czimczik, C. I., Lupascu, M., and Seibt, U. B. Hydrology
modifies ecosystem responses to warming through interactions between soil, leaf and canopy processes in a
high Arctic ecosystem.
23. Miller, O. L., Filley, T. R., Gonzalez-Meler, M. Xu, D. and Welker, J. M. Long-term deeper snow
causes changes in litter quality, soil C and N storage in moist acidic tundra in Northern Alaska
24. O’Dell, M. B., Wolf, N., Spalinger, D. E., Collins, W. and Welker, J. M. Historical caribou diets using
archived serum samples and stable isotopes (δ13C, δ15N).
9
25. Schock, W., Causey, D., Ely, C., Fisher, J., Cable, J., and Welker, J. M. White fronted geese migratory
ecology: Using feather stable isotope (δ13C, δ15N, δ18O, and δD) values to delineate nesting locations in
Alaska.
26. Siess, K., Wolf, N., Welker, J. M., Rea, L., and Cornick, L. Variability in the δ13C and δ15N values of
Stellar sea lion pup vibrissae: Implications for diet and foraging studies.
27. Stanek, A., Mangipane, B., Hildebrand, G., and Welker, J. M. Stable isotope (δ13C, δ15N) analysis and
satellite telemetry depict the complexity of gray wolf (Canis lupus) diets in Southwest Alaska.
28. Terzer, S., Wassenaar, L., Rogers, M., and Welker, J. M. US Precipitation Isoscapes (δ18O and δ2H):
Improved predictions using regionalized climatic regression models.
29. Trube, S., Cole, J. and Welker, J. M. Precipitation isotopes (δ18O and δ2H) in the Desert SW USA: The
role of southern moonsoons in controlling temporal variability.
30. Vander Zanden, H, Hobson, K. A.,Wassenaar, L. I., Wunder, M. B., Welker, J. M. and Bowen, G.
Incorporating climate variability into precipitation isoscapes for interpreting animal migration.
31. Webster, S., Harris, B., Wolf, N., and Welker, J. M. Size-at-age and diet composition of Pacific halibut
(Hippoglossus stenolepis) in Cook Inlet, Alaska.
32. Yang, L., Rogers, M., and Welker, J. M. Wintering Monarch butterfly population identity in S
California: Using precipitation and wing δ2H values across the western U. S.
33. Welker, J. M., Klein, E., Leffler, J., Cherry, J., and J Cable. Coupling of continuous in situ ecosystem
water vapor, precipitation, plant and soil water isotope (δ2H, δ18O and d-excess) measurements in Arctic
Alaska to understand a changing water cycle
Publications Organized by Theme
Arctic Ecosystems & Physiological Ecology
1.
Pattison, R., and Welker, J. M. (2013) Differential ecophysiological response of deciduous shrubs and
a graminoid to long-term snow reductions and additions in moist acidic tundra, Northern Alaska.
Oecologia (resubmitted).
2.
Leffler, J. and Welker, J. M. (2013) Increases in snow elevate Salix leaf N, leaf-level photosynthesis
but without affecting plant water sources: A long-term experiment in NW Greenland. Environmental
Research Letters (in press).
3.
Lupascu, M., Xu, X., Lett, C., Maseyk, K.S., Lindsey, D.S., Thomas, J.S., Welker, J.M., and
Czimczik, C. I. (2013). Rainfall regime controls permafrost contributions to High Arctic CO2
emissions. Nature Climate Change (submitted).
10
4.
Rogers, M. C., O’Dell, M. B., Peacock, E. L., Simac, K., and Welker, J. M. (2013) Isotopic (13C,
15N) characteristics of Beaufort Sea polar bear tissues and diet: food web ecology of a top predator.
Polar Biology (submitted).
5.
Oberbauer, S. F., Elmendorf, S. C., Troxler, T., Hollister, R. D., Welker, J. M., et al. (2013)
Phenological responses of tundra plants to background climate variation tested using the International
Tundra Experiment (ITEX). Proceedings of the Royal Academy (in press).
6.
Sharp, E., Sullivan, P., Steltzer, H., Csank, A., and Welker, J. M. (2013) Complex carbon cycling
responses to multi-level warming and supplemental summer rain in a High Arctic ecosystem. Global
Change Biology DOI: 10.1111/gcb.12149.
7.
Timling, I., Dahlberg, A., Walker, D. A., Gardens, M., Charcosset, J. Y., Welker, J. M. and
Taylor, D. L. (2012) Distribution and drivers of ectomycorrhizal fungal communities along a
bioclimate gradient in the North American Arctic. Ecoscience 3:1-25.
8.
Cahoon, S., Sullivan, P. F., Shaver, G. R., Welker, J. M., and Post, E. (2012) Interactions among shrub
cover and microclimate may determine future carbon budgets. Ecology Letters 15: 1415-1422 doi:
10.1111/j.1461-0248.2012.01865.x.
9.
Tape, K. D., Hallinger, M., Welker, J. M., and Ruess, R. W. (2012) Landscape heterogeneity of shrub
expansion in Arctic Alaska. Ecosystems doi:10.1007/s10021-012-9540-4.
10.
Elmendorf, S., Henry, G. H. R., Hollister, R. D., Welker, J. M. et al. (2012a) Plot-scale evidence of
tundra vegetation change to recent summer climate warming. Nature Climate Change. 2: 453-457.
doi:10.1038/nclimate1465.
11.
Elmendorf, S., Henry, G. H. R., Hollister, R. D., Welker, J. M., et al. (2012b) Global assessment of
experimental climate warming on tundra vegetation: Heterogeneity over space and time. Ecology
Letters. 15(2): 164-175. doi: 10.1111/j.1461-0248.2011.01716.x.
12.
Meyers-Smith, I., Forbes, B., Wilmking, W., Welker, J. M. et al. (2011) Shrub expansion in tundra
ecosystems: dynamics, impacts and research priorities. Environmental Research Letters 6.
doi:10.1088/1748-9326/6/4/045509.
13.
Rogers, M. C., Sullivan, P. F., and Welker, J. M. (2011) Evidence of nonlinearity in the response of
net ecosystem CO2 exchange to increasing levels of winter snow depth in the High Arctic of Northwest
Greenland. Arctic, Antarctic and Alpine Research. 43: 95-106.
14.
Tape, K. D., Verbyla, D. and Welker, J. M. (2011) Erosion decline in Arctic Alaska uplands since
1980: The influence of shrubs, runoff, and permafrost. JGR Biogeosciences. 116: G04024.
doi:10.1029/2011JG001795.
15.
Nowinski, N., Taneva, L., Trumbore, S., and Welker, J. M. (2010) Decomposition of old organic
matter as a result of deeper active layers in a snow depth manipulation experiment. Oecologia. 163(3):
785-792. doi:10.1007/s00442-009-1556-x.
11
16.
Czimczik, C. I., and Welker, J. M. (2010) Radiocarbon content of CO2 respired from High Arctic
tundra in Northwest Greenland. Arctic, Antarctic and Alpine Research. 42(3): 342-350.
doi:10.1657/1938-4246-42.3.342.
17.
Sullivan, P. F., Arens, S., Sveinbjörnsson, B., and Welker, J. M. (2010) Modeling the seasonality of
belowground respiration along an elevational gradient in the western Chugach Mountains, Alaska.
Biogeochemistry. 101(1-3): 61-75. doi:10.1007/s10533-010-9471-0.
18.
Post, E., Forchhammer, M. C., Welker, J. M., et al. (2009) Ecological dynamics across the Arctic
associated with recent climate change. Science. 325(5946): 1355-1358. doi:10.1126/science.1173113.
19.
Sullivan P. F., Welker, J. M., Arens, S. J. T., and Sveinbjörnsson, B. (2008) Continuous estimates of
CO2 efflux from arctic and boreal soils during the snow-covered season in Alaska. JGR
Biogeosciences. 113: G04009. doi:10.1029/2008JG000715.
20.
Walker, D. A., Epstein, H. E., and Welker, J. M. (2008) Introduction to the special section:
Biocomplexity in Arctic terrestrial environments. Journal of Geophysical Research. G03S14.
21.
Sullivan, P. F, Welker, J. M., Steltzer, H., Sletten, R., Hagedorn, B., Arens, S. J. T., and Horwath,
J. L. (2008) Energy and water additions give rise to simple responses in plant canopy and soil
microclimates of a high arctic ecosystem. Journal of Geophysical Research. G03S08.
22.
Arens, S. J. T., Sullivan, P. F., and Welker, J. M. (2008) Nonlinear responses to nitrogen and strong
interactions with nitrogen and phosphorus additions drastically alter the structure and function of a high
arctic ecosystem. Journal of Geophysical Research. G03S09.
23.
Steltzer, H., Hufbauer, R. A, Welker, J. M., Casalis, M., Sullivan, P. F., and Chimner, R. A. (2008)
Frequent sexual reproduction and high intraspecific variation in Salix arctica: Implications for a
terrestrial feedback to climate change in the High Arctic. Journal of Geophysical Research. G03S10.
24.
Sullivan P. F., Arens, S.J.T., Chimner, R. A., and Welker, J.M. (2008) Temperature and
microtopography interact to control carbon cycling in a high arctic fen. Ecosystems. 11: 61-76.
25.
Oberbauer, S., Tweedie, C., Welker, J. M., et al. (2007) Tundra CO2 fluxes in response to
experimental warming across latitudinal and moisture gradients. Ecological Monographs. 77: 221-238.
26.
Sullivan, P.F., and Welker, J. M. (2007) Variation in leaf physiology of Salix arctica within and
across ecosystems in the High Arctic: Test of a dual isotope conceptual model. Oecologia. 151: 372386.
27.
Cornelissen, J. H. C., Van Bodegom, P. M., Aerts, R., Callaghan, T. V., Welker, J. M., et al. (2007)
Global negative vegetation feedback to climate warming responses of leaf litter decomposition rates in
cold biomes. Ecology Letters. 10(7): 619-627. doi:10.1111/j.1461-0248.2007.01051.x.
28.
Sullivan, P.F., Sommerkorn, M., Rueth, H., Nadelhoffer, K., Shaver, G. and Welker, J. M. (2007)
Climate and species affect fine root production with long-term fertilization in acidic tussock tundra
near Toolik Lake, Alaska. Oecologia. 153: 643-652.
12
29.
Steltzer, H., and Welker, J. M. (2006) Modeling the effect of photosynthetic vegetation properties on
the NDVI-LAI relationship. Ecology. 87: 2765-2772.
30.
Schimel, J., Fahnestock, J., Michaelson, G., Milkan, C., Ping, C, Romanovsky, V., and Welker, J. M.
(2006) Cold-season production of CO2 in Arctic soils: Can laboratory and field estimates be reconciled
through a simple modeling approach? Arctic, Antarctic and Alpine Research. 33: 120-125.
31.
Sturm, M., Schimel, J., Michaelson, G., Welker, J. M., Oberbauer, S. F., Liston, G., Fahnestock, J. T.,
and Romanovsky, V. E. (2005) Winter biological processes could help convert arctic tundra to
shrubland. Bioscience. 55, 17-26.
32.
Chapin, F.S., Sturm, M., Serreze, M. C., McFadden, J. P., Key, J. R., Lloyd, A. H., McGuire, A. D.,
Rupp, T. S., Lynch, A. H., Schimel, J. P., Beringer, J., Chapman, W. L., Epstein, H. E., Euskirchen, E.
S., Hinzman, L. D., Jia, G., Ping, C-L., Tape, K. D., Thompson, C. D. C., Walker, D. A., and Welker,
J. M. (2005) Role of land-surface changes in Arctic summer warming. Science. 310(5748): 657-660.
doi:10.1126/science.1117368.
33.
Hinzman, L., Oechel, W., Sturm, M., Welker, J. M., Nelson, F., Romanovsky, V., Chapin, F. S.., et al.
(2005) Evidence for recent changes in the Arctic terrestrial landscape. Climatic Change. 72: 251-298.
34.
Sullivan, P. F., and Welker, J. M. (2005) Warming chambers stimulate early season growth of an
Arctic sedge: Results of a minirhizotron field study. Oecologia. 142: 616-626.
35.
Welker, J. M., Fahnestock, J. T., Sullivan, P. F., and Chimner, R. A. (2005) Leaf mineral nutrition of
arctic plants in response to long-term warming and deeper snow in N. Alaska. Oikos. 109: 167-177.
36.
Welker, J. M., Rayback, S., and Henry, G. (2005) Arctic and North Atlantic Oscillation phase changes
are recorded in the isotopes (18O & 13C) of Cassiope tetragona plants. Global Change Biology.
11: 1-6.
37.
Welker, J. M., Fahnestock, J. T., Henry, G. H. R., O’Dea, K. W., and Chimner, R. A. (2004) CO2
exchange in three Canadian High Arctic ecosystems: Response to long-term experimental warming.
Global Change Biology. 10(12): 1981-1995. doi:10.1111/j.1365-2486.2004.00857.x.
38.
Schimel, J. S., Bilbrough, C. B., and Welker, J. M. (2004) The effect of changing snow cover on yearround soil nitrogen dynamics in Arctic tundra ecosystems. Soil Biology and Biochemistry. 36: 217227.
39.
Welker, J. M., Jonsdottir, I., and Fahnestock, J. T. (2003) Isotopic (13C and 15N) characteristics of
Carex plants and populations along the Eurasian Coastal Arctic. Polar Biology. 27: 29-37.
40.
Welker, J. M., Fahnestock, J. T., Henry, G. H. R., O’Dea, K. W., and Piper, R. E. (2002) Microbial
activity discovered in previously ice-entombed Arctic ecosystems. EOS Transactions American
Geophysical Union. 83(26): 281-284. doi:10.1029/2002EO000198.
41.
Welker, J. M., Fahnestock, J. T., and Jones, M. H. (2000) Annual CO2 flux from dry and moist arctic
tundra: Field responses to increases in summer temperature and winter snow depth. Climatic Change.
44: 139-150.
13
42.
Fahnestock, J. T., Povirk, K. A., and Welker, J. M. (2000) Abiotic and biotic effects of increased litter
accumulation in arctic tundra. Ecography. 23: 623-631.
43.
Bilbrough, C. J., Welker, J. M., and Bowman, W. D (2000) Early-spring N uptake by snow covered
plants: A comparison of arctic and alpine plant function under snowpack. Arctic, Antarctic and Alpine
Research. 32: 404-411.
44.
Jones, M. H., Fahnestock, J. T., Stahl, P. D., and Welker, J. M. (2000) A note on summer CO2 flux,
soil organic matter and soil microbial biomass from different high arctic ecosystem types in
northwestern Greenland. Arctic, Antarctic and Alpine Research. 32: 104-106.
45.
Fahnestock, J. T., Jones, M. H., Brooks, P. D., and Welker, J. M. (1999) Significant CO2 emissions
from tundra soils during winter: Implications for annual carbon budgets of arctic communities. Global
Biogeochemical Cycles. 13: 775-779.
46.
Jones, M. H., Fahnestock, J. T., and Welker, J. M. (1999) Early and late winter CO2 efflux from Arctic
tundra in the Kuparuk River watershed, Alaska. Arctic, Antarctic and Alpine Research. 31: 187-190.
47.
Arft, A. M., Walker, M. D., Gurevitch, J., Welker J. M., et al. (1999) Response patterns of tundra
plant species to experimental warming: Meta-analysis of the International Tundra Experiment.
Ecological Monographs. 69(4): 491-511.
48.
Welker, J. M., Brown, K. B., and Fahnestock, J. T. (1999) CO2 flux in arctic and alpine dry tundra:
Comparative field responses under ambient and experimentally warmed conditions. Arctic, Antarctic
and Alpine Research. 31: 308-313.
49.
Walker, M. D., Walker, D. A., Welker, J. M., Arft, A. M., Bardsley, T., Brooks, P. D., Fahnestock,
J. T., Jones, M. H., Losleben, M., Parsons, A. N., Seastedt, T. R., and Turner, P. L. (1999) Long-term
experimental manipulation of winter snow regime and summer temperature in arctic and alpine tundra.
Hydrological Processes. 13: 2315-2330.
50.
Jones, M. H., Fahnestock, J. T., Walker, D. A., Walker, M. D., and Welker, J. M. (1998) Carbon
dioxide fluxes in moist and dry arctic tundra during the snow-free season: responses to increases in
summer temperature and winter snow accumulation. Arctic and Alpine Research. 30: 373-380.
51.
Fahnestock, J. T., Jones, M. H., Brooks, P. D., Walker, D. A., and Welker, J. M. (1998) Winter and
early spring CO2 flux from tundra communities of northern Alaska. Journal of Geophysical Research.
102 (D22): 29925-29931.
52.
Welker, J. M., Molau, U., Parsons, A. N., Robinson, C., and Wookey, P. A. (1997) Response of Dryas
octopetala to ITEX manipulations: A synthesis with circumpolar comparisons. Global Change
Biology. 3 (Suppl. 1): 61-73.
53.
Walsh, N., McCabe, T., Parsons, A. N., and Welker, J. M. (1997) Experimental manipulations of
snowdepth: Effects on mineral nutrition content of caribou forage. Global Change Biology. 3 (Suppl.
1): 158-164.
14
54.
Robinson, C. H., Wookey, P. A., Parson, A. N., Welker, J. M., Callaghan, T. V., Press, M. C., and
Lee, J. A. (1995) The response of plant litter decomposition, soil nutrient release and nitrogen
mineralization to simulate climate change in a high arctic polar semi-desert and a subarctic dwarf shrub
heath. Oikos. 74: 503-512.
55.
Wookey, P. A., Robinson, C. H., Parsons, A. N., Welker, J. M., Press, M., Callaghan, T. V., and Lee,
J. A. (1995) Environmental constraints on the growth and performance of Dryas octopetala ssp. at a
high arctic polar semi-desert. Oecologia. 102: 478-489.
56.
Parsons, A.N., Wookey, P.A., Welker, J.M., Press, M.C., Callaghan T.V., and Lee, J.A. (1995)
Growth of Calamagrostis lapponica in response to simulated environmental change in the Subarctic.
Oikos. 72: 61-66.
57.
Rieley, G., Welker, J. M., Eglinton, G., and Callaghan, T. V. (1995) Epicuticular waxes of arctic
plants: Compositional differences in relation to winter snow cover. Phytochemistry. 38: 45-52.
58.
Parsons, A.N., Welker, J. M., Wookey, P. A., Press, M.C. Callaghan, T. V., and Lee, J. A. (1994)
Growth responses of four dwarf shrubs to simulated climate change. Journal of Ecology. 82: 307-318.
59.
Wookey, P. A., Welker, J. M., Parsons, A. N., Press, M. C.,Callaghan, T. V., and Lee, J. A. (1994)
Differential growth allocation and photosynthetic responses of Polygonum viviparum L. to simulated
environmental change at a high arctic polar semi-desert. Oikos. 70: 131-139.
60.
Wookey, P. A., Parsons, A. N., Welker, J. M., Potter, J. C., Callaghan, T. V., Lee, J. A., and Press, M.
C. (1993) Comparative responses of subarctic and high arctic ecosystems to simulated climate change.
Oikos. 67: 490-502.
61.
Welker, J. M., Wookey, P., Parsons, A. P., Callaghan, T. V., Press, M. C., and Lee, J. A. (1993) Leaf
carbon isotope discrimination and demographic responses of Dryas octopetala to water and
temperature manipulations in a high arctic polar semi-desert, Svalbard. Oecologia. 95:463-470.
Isotope Biogeochemistry
62.
63.
Winnick, M., Welker, J. M., and Chamberlain, P. (2013) Stable Isotope evidence of El Nino like
circulation in Pliocene western United States. Climate of the Past 9: 903-912.
von Biela, V. R., Zimmerman, C. E., Cohn, B. R., and Welker, J. M. (2013) Evidence of multiple
carbon sources and prey communities in young-of-the-year Arctic cisco (Coregonus autumnalis) using
13C, 15N and diet analyses. Polar Biology 36: 137-146.
64.
Wolf, N., Ely, C., Rogers, M. and Welker, J. M. (2013) Tundra swan migration ecology: Use of
stable isotopes (15N & D), satellite trackers and N American isoscapes. Ecology (submitted)
65.
Welker, J. M. (2012) ENSO effects on the isotopic (δ18O, δ2H and d-excess) of precipitation across
the US using a long-term network (USNIP). Rapid Communication in Mass Spectrometery 17: 16551660.
15
66.
Liu, Z., Bowen, G., Welker, J. M., and Yoshimura, K. (2012) Winter precipitation isotope gradients
(δ18O) of the contiguous USA and their relationship to the Pacific/North American (PNA) pattern.
2012. Climate Dynamics 10.1007/s00382-012-1548-0.
67.
Liu, Z., Bowen, G., Yoshimura, K., and Welker, J. M. (2012) GCM-based analysis of Pacific/North
American (PNA) teleconnection controls on precipitation isotopes across the contiguous USA. J of
Planetary and Earth Sciences (Submitted).
68.
Van Wilgenburg, S. L., Hobson, K. A., Brewster, K. R., and Welker, J. M. (2012) Assessing dispersal
in threatened migratory birds using stable hydrogen isotope (D) analysis of feathers. Endangered
Species Research. 16: 17-29. doi:10.3354/esr00383.
69.
Kikuchi, C., Ferre, T. P., and Welker, J. M. (2012) Groundwater-surface water interactions in an
Alaskan freshwater stream. Journal of Hydrology. doi:10.1016/j.jhydrol.2012.04.002.
70.
Werner, C., Welker, J. M., et al. (2012) Linking carbon and water cycles using stable isotopes across
scales: Progress and challenges. Biogeosciences Discussions. 8: 2659-2719. (Online Journal).
71.
Miles, G. R., Mitchell, M, J., Mayer, B., Likens, G., Welker, J. M. (2011) Long-term analysis of
Hubbard Brook stable oxygen isotope ratios of stream water and precipitation sulfate. Biogeochemistry
doi:10.1007/s10533-011-9670-3.
72.
Stevenson, B. A., Kelly, E., McDonald, E., Busacca, A., and Welker, J. M. (2010) Oxygen isotope
ratios in Holocene carbonates across a climatic gradient, eastern Washington State, USA: Evidence for
seasonal effects on pedogenic mineral isotopic composition. The Holocene. 20(4): 575-583.
doi:10.1177/0959683609356588.
73.
Vachon, R. W., Welker, J. M., White, J. W. C., and Vaughn, B. H. (2010) Monthly precipitation
isoscapes (δ18O) of the United States: Connections with surface temperatures, moisture source
conditions, and air mass trajectories. JGR Atmospheres. 115: D21126. doi:10.1029/2010JD014105.
74.
Vachon, R. W., Welker, J. M., White, J. W. C., and Vaughn, B. H. (2010) Moisture source
temperatures and precipitation 18O-temperature relationships across the US. Water Resources
Research. 46: W07523. doi:10.1029/2009WR008558.
75.
Liu, Z., Bowen, G., and Welker, J. M. (2010) Atmospheric circulation is reflected in precipitation
isotope gradients over the conterminous United States. JGR Atmospheres. 115: D22120.
doi:10.1029/2010JD014175.
76.
Craine, J., Elmore, A., Aidar, M., Amundson, R., Bustamante, M., Coetsee, C., Dawson, T., Hawkins,
H., Hobbie, E., Kahmen, A., Koba, K., Mack, M., Makarov, M., McLauchlan, K., Michelsen, A.,
Nardoto, G., Pardo, L., Peñuelas, J., Reich, P., Schuur, E., Stock, W., Tateno, R., Templer, P., Virginia,
R., Welker, J.M., and Wright, I. (2009) Global patterns of foliar nitrogen isotopes and their
relationships with nitrogen availability. New Phytologist. 183(4): 980-992. doi:10.1111/j.14698137.2009.02917.x
16
77.
Sjostrom, D. and Welker, J. M. (2009) The influence of air mass source on the seasonal isotopic
composition of precipitation, eastern USA. Journal of Geochemical Exploration-Isoscapes Special
Issue. 102(3):103-112. doi:10.1016/j.gexplo.2009.03.001.
78.
Still, C. J., Riley, W.J., Biraud, S.C., Noone, D.C., Buenning, N.H., Randerson J.T., Torn, M.S.,
Welker, J. M., White, J.W.C., Vachon, R., Farquhar, G.D., and Berry, J.A. (2009) The influence of
clouds and diffuse radiation on ecosystem-atmosphere CO2 and CO18O exchanges. Biogeosciences. 7:
210-217. doi:10.1029/2007JG000675.
79.
Vachon, R., White, J. W., Welker, J. M., Gutman, S. (2007) Seasonality of precipitation affects the
annual isotopic (18O) values across the United States: A sensitivity study. Geophysical Research
Letters. 34 L21707.
80.
McGuire, K .J., McDonnell, J. J., Weiler, M., McGlynn, B. L., Kendall, C., Welker, J. M., and Seibert,
J. (2005) The role of topography on catchment-scale water residence time. Water Resources Research.
41: 1-14.
81.
Kohn, M. J. and Welker, J. M. (2005) On the temperature correlation of 18O in modern precipitation.
Earth and Planetary Science Letters. 231(1-2): 87-96. doi:10.1016/j.epsl.2004.12.004.
82.
Dutton, A. L., Wilkinson, B. H., Bowen, G., Welker, J. M., and Lohmann, K. C. (2005) Comparison
of river water and precipitation 18O across the 48 contiguous United States. Hydrological Processes.
19: 3551-3572.
83.
Bowling, D. R., McDowell, N. G., Welker, J. M., Bond, B. J., Law, B. E., and Ehleringer, J. R. (2003)
Oxygen isotope content of CO2 in nocturnal ecosystem respiration: 1. Observations in forests along a
precipitation transect in Oregon, USA. Global Biogeochemical Cycles. 17(4): 1120.
84.
Bowling, D. R., McDowell, N. G., Welker, J. M., Bond, B. J., Law, B. E., and Ehleringer, J. R. (2003)
Oxygen isotope content of CO2 in nocturnal ecosystem respiration: 2. Short-term dynamics of foliar
and soil component fluxes in an old-growth ponderosa pine forest. Global Biogeochemical Cycles.
17(4): 1124.
85.
Larson, R. M., Todd, L. C., Kelly, E. F., and Welker, J. M. (2001) Carbon isotopic analysis of bison
dentition. Great Plains Research. 11: 25-64.
86.
Welker, J. M. (2000) Isotopic (18O) characteristics of weekly precipitation collected across the
United States: An initial analysis with application to water source studies. Hydrological Processes. 14:
1449-1464.
87.
Harvey, F. E., and Welker, J. M. (2000) Stable isotopic composition of precipitation in the semi-arid
north-central portion of the US Great Plains. Journal of Hydrology. 238: 90-109.
88.
Dodd, M. B., Lauenroth, W. K., and Welker, J. M. (1998) Differential water resource use by
herbaceous and woody plants in a shortgrass steppe community. Oecologia. 117: 504-512.
17
89.
Welker, J. M., Heaton, T. H. E., Sprio, B. and Callaghan, T. V. (1995) Indirect effects of winter
climate on the 13C and the D characteristics of annual growth segments in the long-lived arctic plant
Cassiope tetragona: A preliminary analysis. Palaeoclimate Research. 15: 105-120.
86.
Welker, J. M., Gordon, D. R., and Rice, K. J. (1991) Capture and allocation of nitrogen by Quercus
douglasii seedlings in competition with annual and perennial grasses. Oecologia. 87:459-466.
87.
Welker, J. M., Rykiel, E. J., Briske, D. D. and Goeschl, J. D. (1985) Carbon import among vegetative
tillers within two bunchgrasses: Assessment with carbon-11 labeling. Oecologia. 67:209-212.
Plant-Animal Interactions
88.
Cahoon, S. M. P., Sullivan, P. F., Post, E., and Welker, J. M. (2012) Large herbivores limit CO2
uptake and suppress carbon cycle responses to warming in West Greenland. Global Change Biology.
18: 469-479.
89.
Chimner, R., and Welker, J. M. (2011) Influence of grazing and precipitation on ecosystem carbon
cycling in a mixedgrass prairie. Pastorialism. 1: 20-27.
90.
Chimner, R., Welker, J. M., Morgan, J., LeCain, D. and Reader, J. (2010) Experimental manipulations
of winter snow and summer rain influence ecoystem C cycling in a mixedgrass prairie, Wyoming,
USA. Ecohydrology. 3(3): 284-297. doi:10.1002/eco.106.
91.
Ingram, L. I., Stahl, P. D., Schuman, G., Buyer, J. S., Vance, G. F., Ganjegunte, G. K., Welker, J. M.,
and Derner, J. D. (2008) Grazing impacts on soil carbon and microbial communities in a mixed-grass
ecosystem. Soil Science Society of America Journal. 72: 939-948. doi:10.2136/sssaj2007.0038.
92.
Ganjegunte, G. K., Vance, G. F., Preston, C. M., Schuman, G. E., Ingram, L. I., Stahl, P. D., Welker,
J. M. (2005) Soil organic carbon composition in a northern mixed-grass prairie: Effects of grazing.
Soil Science Society of America Journal. 69: 1746-1756. doi:10.2136/sssaj2005.0020.
93.
Welker, J. M., Fahnestock, J. T., Povirk, K. L., Bilbrough, C. J., and Piper, R. E. (2004) Alpine
grassland CO2 exchange and nitrogen cycling: Grazing history effects, Medicine Bow Range,
Wyoming, U.S.A. Arctic, Antarctic and Alpine Research. 36(1): 11-20. doi:10.1657/15230430(2004)036[0011:agcean]2.0.co;2
94.
Alstad, K. P., Welker, J. M., Williams, S. and Trilica, M. J. (1999) Carbon and water relations of Salix
monticola in response to winter browsing and changes in surface water hydrology: an isotopic study
using 13C and 18O. Oecologia. 120: 375-385.
95.
Welker, J. M. and Menke, J. W. (1990) The influence of simulated browsing on tissue water relations,
growth and survival of Quercus douglasii (Hook and Arn.) seedlings under slow and rapid rates of soil
drought. Functional Ecology. 4: 807-817.
96.
Welker, J. M., Briske, D. D., and Weaver, R. W. (1987) Nitrogen-15 partitioning within a three
generation tiller sequence of the bunchgrass Schizachyrium scoparium: Response to selective
defoliation. Oecologia. 24: 330-334.
18
Climate Change--Ecosystem and Organismic Responses
97.
Cable, J., Olge, K., Bolton, D., Bentley, L., Romonvsky, V., Iwata, H., Harazona, Y., and Welker, J.
M. (2012) Permafrost thaw effects boreal deciduous plant through increased soil water, increased thaw
and warmer temperatures. Ecohydrology (submitted).
98.
Ives, S., Sullivan, P. F., Dail, R., Berg, E., and Welker, J. M. (2012) Seasonal and inter-annual
patterns in the magnitudes of CO2 exchange along a hydrologic gradient in the Kenai Lowlands, AK:
Feedback implications of wetland drying and vegetation succession. Ecohydrology doi:10.1002/
eco.274.
99.
Blumenthal, D., Chimner, R., Welker, J. M., and Morgan, J. (2008) Increased snow facilitates plant
invasion in mixedgrass prairie. New Phytologist. 179(2): 440-448. doi:10.1111/j.14698137.2008.02475.x.
100. Chimner, R. A., and Welker, J. M. (2005) Ecosystem respiration responses to experimental
manipulations of winter and summer precipitation in a Mixedgrass Prairie, WY, USA.
Biogeochemistry. 73(1): 257-270. doi:10.1007/s10533-004-1989-6.
101. Rustad, L. E., Campbell, J., Marion, G. M., Norby, R., Mitchell, M., Hartley, A., Cornelissen, J.,
Gurevitch, J. and GCTE-NEWS (Network of Ecosystem Warming Studies (Welker, J. M. and 15
others). (2001) A meta-analysis of the response of soil respiration, net nitrogen mineralization, and
aboveground plant growth to experimental ecosystem warming. Oecologia. 126(4): 543-562.
doi:10.1007/s004420000544.
102. Welker, J. M., Bowman, W., Williams, M., and Seastedt, T. (2001) Environmental change and future
directions in alpine research. In: Bowman, W. and Seastedt, T. (Eds). Structure and function of an
alpine ecosystem. Oxford University Press: Oxford. Pp. 304-322.
103. Werkman, B. R., Callaghan, T. V., and Welker, J. M. (1996) Responses of bracken to increased
temperature and nitrogen availability. Global Change Biology. 2(1): 59-66. doi:10.1111/j.13652486.1996.tb00049.x
104. Zhang, Y., and Welker, J. M. (1996) Tibetan alpine tundra responses to simulated changes in climate:
Aboveground biomass and community responses. Arctic and Alpine Research. 28(2): 203-209.
105. Welker, J. M., and Briske, D. D. (1992) Clonal biology of the temperate, caespitose, graminoid
Schizachyrium scoparium: A synthesis with reference to climate change. Oikos. 63(3): 357-365.
Carbon Cycling
106. Cable, J. Ogle, K., Welker, J. M. and 10 additional authors. (2011) The temperature responses of soil
respiration in deserts: A seven desert synthesis. Biogeochemistry. 103(1-3): 71-90.
doi:10.1007/s10533-010-9448-z.
107. Hunt, E. R., Kelly, R. D., Smith, W. K., Fahnestock, J. T., Welker, J. M. and Reiners, W. A. (2004)
Estimation of carbon sequestration by combining remote sensing and net ecosystem exchange data for
19
northern mixed-grass prairie and sagebrush-steppe ecosystems. Environmental Management. 33(1):
S432-S441. doi:10.1007/s00267-003-9151-0.
108. Smith, W. K., Kelly, R. D., Welker, J. M., Fahnestock, J. T., Reiners, W. A., and Hunt, E. R., Jr.
(2002) Leaf-to-aircraft measurements of net CO2 exchange in a sagebrush steppe ecosystem. Journal of
Geophysical Research – Atmospheres. 108(D3): 4122. doi:10.1029/2002JD002512.
109. Kelly, R. D., Hunt, E. R., Reiners, W. A., Smith, W. K., and Welker, J. M. (2002) Relationships
between daytime carbon dioxide uptake and absorbed photosynthetically active radiation for three
different mountain/plains ecosystems. Journal of Geophysical Research – Atmospheres. 107(D14):
4223. doi:1029/2001JD001181.
110. Hunt, E. R., Jr., Fahnestock, J. T., Kelly, R. D., Welker, J. M., Reiners, W. A., and Smith, W. K.
(2002) Carbon sequestration from remotely sensed NDVI and net ecosystem exchange. In: Muttiah,
R. S. (Ed.), From Laboratory Spectroscopy to Remotely Sensed Spectra of Terrestrial Ecosystems.
Kluwer: Dordrecht, The Netherlands. Pp.161-174.
111. Povirk, K. A., Welker, J. M., and Vance, G. W. (2001) Carbon sequestration in arctic and alpine
tundra and mountain meadow ecosystems. In: Kimble, J. M., Lal, R., and Follett, R. F. (Eds.) The
Potential of U. S. Grazing Lands to Sequester Carbon and Mitigate the Greenhouse Effect. Lewis
Publishers: Washington, D.C. Pp.189-228.
112. Zeller, K., Zimmerman, G., Hehn, T., Donev, E., Denny, D., Welker, J. M. (2001) Analysis of
inadvertent microprocessor lag time on eddy covariance results. Journal of Applied Meteorology.
40(9): 1640-1646.
Plant and Soil Water Relations
113. McGuire, K. J., McDonnell, J. J., Weiler, M., McGlynn, B. L., Kendall, C., Welker, J. M., and Seibert,
J. (2005) The role of topography on catchment-scale water residence time. Water Resources Research.
41: 1-14.
114. Momen, B., Menke, J. W., Welker, J. M., Rice, K. J., and Chapin, F. S. (1994) Blue oak regeneration
and seedling water relations in four sites within a California oak savanna. International Journal of
Plant Sciences. 155(6): 744-749.
115. Rice, K. J., Gordon, D. R., Hardison, J. L. and Welker, J. M. (1993) Phenotypic variation in seedlings
of a "keystone" tree species (Quercus douglasii): The interactive effects of acorn source and
competitive environment. Oecologia. 96: 536-547.
116. Momen, B., Menke, J. W., and Welker, J. M. (1992) Tissue water relations of Quercus wislizenii
seedlings in response to drought. Acta Oecologica. 13: 127-136.
117. Welker, J. M., McClelland, S., and Weaver, T. W. (1991) Soil water retention after natural and
simulated rainfall on a temperate grassland. Theoretical and Applied Climatology. 44: 447-453.
118. Gordon, D. R., Welker, J. M., Menke, J. W., and Rice, K. J. (1989) Competition for soil water
between blue oak seedlings and annual plants. Oecologia. 79: 533-541.
20
Fulbright Presentations (2012-2013)
Carbon Cycling Processes in a High Arctic Winter-UNIS March 2013
Ancient and modern C processes in the High Arctic of Greenland and Svalbard-CENPERM, Feb. 2013
A Changing High North: Feedbacks and Consequences: US Ambassador to Norway Residence, Feb 2013
Carnivore and Herbivore Food Web Ecology in Alaska, Trondheim University, January 2013
Arctic Tundra Responses to Changes in Climate, As University, December 2012
American Geophyical Union Meeting, 6 posters, December 2012
High and Low Arctic C and N processes in a changing climates, Texas A&M University, November 2012
Tundra feedback responses to climate Changes, Trans-Atlantic Science Week, November 2012
TEACHING AND INSTRUCTION
Fundamentals of Ecology, UAA, Fall 2013
Winter Ecology Processes in the High Arctic, UNIS Spring 2013
Climate Change Seminar-UNIS Spring 2013
Winter Ecology Processes in the High Arctic, UNIS Fall 2012
Climate Change Seminar-UNIS Fall 2012
Isotopes in Environmental Sciences, Spring 2012
Isotope Geochemistry, team instruction, Spring 2010
Graduate Seminar: Ecological Studies in the North, Fall 2009
Isotope Biogeochemistry, University of Alaska Anchorage, Spring 2005
Physiological Plant & Ecosystem Ecology, University of Wyoming, 1999 – 2000
Principles of Rangeland Ecology and Management, University of Wyoming, 1996 - 1999
Stable Isotopes in the Biological and Earth Sciences, 1997 & 1999
Ecophysiology and Biogeochemistry, Colorado State University, 1995
Guest Lectures and Presentations (Recent Examples)
Ungulate and Carnivore diet ecology in Alaska, Trondheim University, Center for Conservation Biology
Broad perspectives on Arctic Change, Norwegian Natural Science University, December 2012
Changes in Climate across the Arctic, Texas A&M University, November 2012
Arctic changes, resource management and policy implications, Transatlantic Science Week, Houston, TX
November 2012
C&N cycling in a changing Arctic, University Center on Svalbard, Undergraduate Seminar, November 2012
Climate Changes in the Arctic, Alaska Pacific University, April 2011
Climate Changes in the Arctic, Alaska Pacific University, March 2010
Winter Processes in Northern Alaska, Alaska Pacific University, March 2009
An Overview of Biocomplexity in the High Arctic, Thule Air Base, Greenland, August 2003
Northern Rangeland Responses to Changing Climates: Examples from AK and Scandinavia. Rangeland
Ecosystem Science Department, Colorado State University, 2002
The Global Carbon Cycle and Isotopic Applications, Geology and Geophysics Department, University of
Wyoming, 2001
Isotopes in Terrestrial Ecosystem Biogeochemistry, Botany Department, University of Wyoming, Spring
1999
Our Changing Climate: How Will it Affect Rangelands? Laramie Sunrise Rotary Club, December 1997
The Causes and Consequences of Global Climate Change; Department of Plant, Soil and Insect Sciences,
University of Wyoming, Soil Microbial Ecology Class, Fall 1997
21
Climate Change in High and Mid-Latitudes: What can we expect? Institute of Environment and Natural
Resources, University of Wyoming, Fall 1997
National Activities
Editorial Responsibilities
Associate Editor, Arctic, Antarctic and Alpine Research, 2006-present
Corresponding Editor, EOS, American Geophysical Union, 2005-present
Advisory Appointments
Prince William Sound Science Center, Board of Directors, 2009-2012
Advisory Panelist, Office of Polar Programs, National Science Foundation, 2006
Advisory Panelist, Office of Polar Programs, National Science Foundation, 2005
Advisory Panelist, IGERT, National Science Foundation, 2004
Advisory Panelist, Biocomplexity in the Environment, National Science Foundation, 2001
Advisory Panelist, Ecosystem Studies Program, National Science Foundation, 1999 and 2000
Advisory Panelist, NEON Instrumentation, National Science Foundation, 2000
Infrastructure Planning
NEON Taiga Implementation Committee Chair, 2009, 2010, 2011
NEON Taiga Regional Representative, 2006, 2007, 2008
Organization of Taiga domain information and site determination
NEON Tundra-Taiga Planning Initiative Organizer (Anchorage, AK), February, 2006
International Activities
Research Recognition
IPY Montreal, Co-author and mentor of Adam Csank’s 2nd place “Young Investigator Researcher
Excellence” award-winning poster presentation, April 2012
Research Program Participation
Shrub-Hub participant--Tundra science network
International Polar Year, Two NSF IPY projects, 2006-2009
International Tundra Experiment (ITEX) PI, 1994-present
International Conference of Arctic Research Planning Meeting, Copenhagen, March 2006
SwedArc--Swedish-Russian Expedition in the Eastern Arctic, 1998
Terrestrial Initiative of Global Change Research (TIGER), National Environment Research Council,
England, 1996-1998
Arctic Special Topic, National Environment Research Council, England, 1990-1993
External Examiner
Jean Birks, University of Waterloo, Canada, PhD
22
University Appointments
UAA Research Committee, 2012-present
UAA Vice Provost for Research, Search Committee, 2011
UAA and Chugach National Forest Research and Outreach Partnership, 2010
UA Center for Global Climate Change Graduate and Undergraduate Fellowship Review Committee, Spring
2009, 2010, 2011, 2012
UAA Committee for Undergraduate Research, 2008-2009
UA EPSCoR Phase 4 Proposal Committee, 2009
UA Committee on Climate Change, 2009-present
Research Council, College of Arts and Sciences, 2008, 2009, 2010
UAA Research Cabinet, Vice Provost for Research and Graduate Studies Office, Fall 2007
UA IPY Scientific Subcommittee, August 2007-present
IPY Organizing Committee, Vice Provost for Research and Graduate Education, 2007-present
Vice President for Research and Graduate Education Council-University of Alaska Anchorage, September
2004-2007
Council of Chairs Budget Planning Retreat, February, 2006, Anchorage
Integrated Sciences Building Space and Planning Committee, UAA, 2004-present
Chancellor’s Council on Budget and Planning-University of Alaska Anchorage, 2004-2007
Dean’s Council of Chairs and Directors-University of Alaska Anchorage, September 2004-present
Goldwater Scholarship Committee, University of Wyoming, 1998-2001
Dean’s Five-year Review Committee, University of Wyoming, 1998-1999
Cross-college Life Sciences Program, University of Wyoming, 1999
Faculty Senator, University of Wyoming, 1997-2001
Dean’s Council, College of Agriculture, 1998-2001
Leadership Training
UAA Effective Leadership Module, Human Resources Department, November 2007
UA Presidential Leadership Forum, October 2007
UA Presidential Leadership Forum, September 2005
UAA Planning and Budget Workshop, L Gates-Seminar Leader, January 2005
Public Outreach and Education (recent examples)
US Embassy, Oslo,Norway; Fulbright Evening Reception-Keynote Address-February 2013
Korean Arctic Climate Change News Broadcast, June 2012
UAA-USFS Classrooms for Climate Symposium Session Chair, May 2011
Field Tour, Global Climate Change in the High Arctic, Thule Greenland, 2010
Anchorage School District, Climate Change Symposium, 2010
Channel 2 interview, Glacial Retreat in Alaska, 2010
Norwegian Parliamentarians, Energy and Environment Committee: Opportunities and challenges for Alaska
& Norway under changing climates and increasing energy demands, Dinner speaker, September 2007
Anchorage Channel 2 television commentary & interview: United Nations and Bush Administration Climate
Change Sessions, September 2007
UAA Sustainability Workshop, Arctic Climate Change: Today’s perspective, September 2007
23
Anchorage School District Science Teacher Training, Climate Change Science in the Classroom, August
2007
Alaska Newspaper Featured Article on Greenland Climate Change, August 2007
DOD Stars & Stripes Newspaper Featured Arctic on field research in NW Greenland, July 2007
UAA “Witness the Arctic” featured insert, ARCUS Winter 2006
US Arctic Research Commission, ENRI Arctic Studies, June 2005 & 2006
North Pacific Research Board meeting: ENRI & UAA Research trajectories for 2010, June 2006
Mayor of Anchorage “Trade Mission” meeting with Seattle Mayor Greg Nickels: Presentation on Climate
Change in the Arctic, July 2006
“Strengthening our Cities: Mayors Responding to Global Warming” sponsored by Mayor Mark Begich,
Field trip leader and speaker, September 2006
KUAC Public Radio, “Alaska News Nightly” interview and commentary on the changing Arctic, June 2006
Invited Presentation to the Alaska Conservation Alliance Annual Meeting on Climate Change in the Arctic,
September 2005
Dr. A. Bement, Director of the National Science Foundation and Chancellor Maimon: An ENRI Overview,
September 2005
MENTORED UNDERGRADUATE STUDENTS
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
Leland Miller- University of Alaska Anchorage-2012
Lacey Miller- REU student, University of Alaska Anchorage-2012
Brianna Traxinger-Colorado College-2012
Andy DuComb, University of Colorado--Summer 2011
Brian Kramp, Alaska Pacific University--Summer 2011
Leland Miller, University of Alaska Anchorage--Summer 2011
Isaac Hayward, University of Wyoming--Summer 2011
Amber Lewis, University of Alaska Anchorage--REU student 2010
Brett Frazer, University of Alaska Anchorage--REU student 2008, 2009, 2010
Andy Anderson-Smith, University of Alaska Anchorage, 2009
Eian Prohl, University of New Hampshire--REU 2009
Heidi Kristensen, University of Alaska Fairbanks--REU student 2007
Jeremy Chignell, University of Alaska Anchorage--REU student 2007
Katy Nagel, University of Minnesota, 2007
Haley Ohms, Biology, University of Alaska Anchorage, 2006
Meg Olson, University of Alaska Anchorage, 2004
Kara Bastin, Life Sciences Program, CSU, 2002-present
Travis Davis, Resource Management, CSU, 2003
Nick Levitt, Chemistry, Texas A&M University, 2003
Kristy Olin, Natural Resources, Colorado State University, 2003
Vanessia Thames, Natural Resource Management, CSU, 2002-present
Brad Holliday, Renewable Resources, University of Wyoming, 1999-2000
Todd Spivey, Renewable Resources, University of Wyoming, 1999-2001
Tom Antionti, Renewable Resources, University of Wyoming, 1999-2001
Mark McNeal, Botany Department, University of Wyoming, 1999-2000
Jason Thomas, Botany Department, University of Wyoming, 1999-2001
Judd Hill, Biology Department, Wake Forest University, 1999
Mary Clever, Renewable Resources, University of Wyoming, 1999
Jessica Surlock, Renewable Resources, University of Wyoming, 1998-1999
24
30.
31.
32.
33.
34.
35.
Kyra Povirk, Renewable Resources, University of Wyoming, 1996-1997
Robert Piper, Renewable Resources, University of Wyoming, 1996-1998
Amy Davison, Rangeland Ecology and Watershed Management, UW, 1996-1997
Megan Ordway, Rangeland Ecosystem Science Department, CSU, 1995-1996
Amy Oscarson, Rangeland Ecosystem Science Department, CSU, 1994-1995
Jeff Leonard, Rangeland Ecosystem Science Department, CSU, 1993-1994
GRADUATE STUDENT SUPERVISION
Major Professor and/or Co-advisor
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
Ken Tape, PhD student, UAA-UAF Joint PhD program, NSF EPSCoR fellowship, 2008-2012
Matt O’Dell, MS UAA, 2011-present
Matt Winnick, PhD student, Stanford University, 2011-present
Andy Baltensperger, PhD student UAF, Institute of Arctic Biology, 2010-present
Andy Anderson-Smith, MS student, University of Alaska, Anchorage, 2010-present
Ashley Stanek, MS student, University of Alaska Anchorage, 2010-present
Lisa Ebbs, MS student, University of Alaska Anchorage, 2009-present
Sean Cahoon, MS student, University of Alaska Anchorage, 2008-2009 (currently PhD student at PSU)
Beth Sharp, MS student, University of Alaska Anchorage, 2009-2012 (currently Enviornmental
Scientists-BP Alaska)
Seth Arens, MS student, University of Alaska Anchorage, 2005-2007 (currently program manager, City
of Salt Lake, UT)
Matt Rogers, MS student, University of Alaska Anchorage, 2006-2008 (currently isotope analyst, UAA)
Allison Sayer, MS student, University of Alaska Anchorage, 2005-2007 (graduated May 2008)
Paddy Sullivan, Francis Clark Fellow, CSU, Graduate Degree Program in Ecology, PhD awarded 2005
(Currently a Research Scientist at ENRI-UAA)
Derek Esposito, CNR 3F Fellow, CSU, Graduate Degree Program in Ecology, MS, 2002
Kevin O’Dea, UW Renewable Resources, MS 2000-present
Robert Piper, UW Renewable Resources Department, MS, 1999-2001 (Currently a Soil Scientist at
North Wind Environmental Corporation)
Ted Hehn, UW Renewable Resources Department, MS, 1997-1999 (Currently a Research Associate
for NEON)
Karla Brown, CSU Rangeland Ecosystem Science Department, MS, 1994-1996 (Currently a CSU
Extension Agent.)
Karrin Alstad, CSU Rangeland Ecosystem Science Department, MS, 1995-1998 (Currently a PhD
student at Northern Arizona University)
Andrea Rayte, CSU Rangeland Ecosystem Science Department, MS, 1994-1996
Graduate Committee Member
1.
2.
3.
4.
5.
6.
7.
James Willacker, PhD University of Alaska Fairbanks / UAA, 2010-present
Wade Schock, MS student, University of Alaska Anchorage, 2010-present
Dan Rinella, PhD student, University of Alaska Fairbanks / UAA, 2005-2009
Ryan Vachon, PhD student, University of Colorado, Boulder, 2002-2007 (Currently a Postdoctoral
Associate with CIRES, CU Boulder)
Steven Blecker, GDPE, Colorado State University, PhD, 2001-2004
Danielle Bilyeu, GDPE, Colorado State University, PhD, 2002-2004
John Stark, GDPE, Colorado State University, PhD, 2002-2004
25
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
Mark Lyford, UW Botany Department, PhD, 1999-2001 (Currently an instructor at the University of
Wyoming)
Brenda Greer, UW Geology and Geophysics, PhD, 2000
Michele Slayton, UW Botany Department, PhD, 1999-2000 (Currently an Assistant Professor at
Western State College, Gunnison, CO)
Jerry Winslow, UW Botany Department, PhD, 1996-1999 (Currently an Assistant Professor, Texas
Tech University)
Rachel Toner, UW Geology and Geophysics, MS, 1997-2000
Matt Germino, UW Botany Department, PhD, 1997-2000 (Currently an Research Scientists with USGS,
Boise, ID)
Cynthia Wilson, UW Botany Department, MS, 1997-1999 (Currently a PhD student at Duke
University)
Nicole Waginspock, UW Anthropology Department, MS, 1997-1999 (Currenty a PhD student at the
University of Arizona)
Mike Dodd, CSU Rangeland Ecosystem Science, PhD, 1994-1997 (Currently a Research Scientist in
New Zealand)
Rich Alward, CSU Biology Department and GDPE, PhD, 1996-1999 (Currently an Associate Director
of a University of Nebraska Field Station)
Byran Stevenson, CSU Soil and Crop Sciences Department, 1995-1998 (Currently a Research Scientist
with ARS)
Jace Fahnestock, CSU Biology Department, 1997-1999, (Currently a VP for Natural Resources, North
Wind Environmental Consulting Firm, Idaho)
SUPERVISED POSTDOCTORAL FELLOWS
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
Dr. Adam Csank, NSF 14C project, 2010-2012 (currently Assistant Professor, Lepzing Univ., Canada)
Dr. Josh Leffler, NSF AON project, 2012-present
Dr. Nathan Wolf, USFWS LCC project, 2012-present
Dr. Pat Tomco, NASA Copper River project, 2011-present
Rommel Zulueta, NASA Copper River project, 2010-present
Dr. Jessica Cable, NSF OPP Postdoctoral Fellow, 2009-2011 (Currently Res. Assistant Professor-UAF)
Dr. Lina Taneva, NSF IPY Project Postdoctoral Fellow, 2007-2009 (currently a staff scientist in a nonprofit)
Dr. Robert Pattison, NSF IPY Project Postdoctoral Fellow, 2007-2009 (currently a USFS Research
scientist)
Dr. Paddy Sullivan, Biocomplexity Project, 2004-2005 (currently a Research Scientist at ENRI)
Dr. Heidi Steltzer, 2003-2005 NREL, Colorado State University (Currently an Assistant Professor, Fort
Lewis College, CO)
Dr. Rod Chimner, 2003-2005, NREL, Colorado State University (Currently Assistant Professor,
Michigan Technology University)
Dr. Jace Fahnestock, 1999-2002, Colorado State University (Currently the VP for Natural Resources,
North Wind Inc.)
Dr. Carol Bilbrough, 1998-2000, University of Wyoming (Currently a Research Scientist with Wyoming
Department of Environmental Quality)
Dr. M. Jones, 1995-1998.
Dr. A. N. Parsons, 1994-1996 (Currently a Program Officer, Natural Environment Research Council,
UK)
Dr. P. A. Wookey, 1991-193, (Currently, Professor, Sheffield University, UK)
26
SUPERVISED RESEARCH ASSOCIATES
1.
2.
3.
4.
5.
4.
5.
6.
7.
8.
Nicchole Van Hoey, DOE Project Summer 2012
Dustin Grossheim, NSF 14C project, Summer 2012
Matt Rogers, Isotope Analyst, UAA Stable Isotope Laboratory, 2011-present
Naomi Bargmann, Assistant Isotope Analyst, Stable Isotope Lab, 2011-present
Brian Cohn, Isotope Analyst, UAA Stable Isotope Laboratory, 2007-2011
Daniel Reuss, Laboratory Manager, CSU Stable Isotope Facility, Colorado State University
Derek Esposito, NREL, Colorado State University, 2001-2002
L. Walsh, NREL, Colorado State University, 2003
Kyra Povirk, University of Wyoming, Fall 1999-2000 (Currently an Rangeland Management Specialist
at Whitebark, Inc., Missoula, Montana)
M. Larson, University of Wyoming, Stable Isotope Facility, 1998-2000. (Currently Isotope Lab
Manager at the University of Wyoming)
PROFESSIONAL SERVICE
International External Examiner
Jean Birks, PhD exam, University of Waterloo, Canada. December 2003. Water isotopes in precipitation and
climate proxies of the Central Great Plains, Canada.
International Program Participation
1.
2.
3.
4.
5.
6.
7.
International Tundra Experiment (ITEX) (http://www.geog.ubc.ca/itex/). A network of arctic and alpine
climate warming studies. 1991-present.
Global Network of Isotopes in Precipitation (GNIP) (http://www-naweb.iaea.org/napc/ih/
IHS_resources_gnip.html). A network of national programs sponsored by the IAEA (International
Atomic Energy Agency) for the study of water isotopes in precipitation as applied to freshwater
processes. 1994-present.
FLUXNET (http://fluxnet.ornl.gov/). A Network of sites that are quantifying the exchange of mass and
energy between the biosphere and the atmosphere. 1996-present.
GCTE-NEWS (IGBP-Global Change and Terrestrial Ecology, Network of Environmental Warming
Studies) (http://www.igbp.net/5.57b1bf74133dc13fe9980003412.html). A consortium of studies
examining the effects of changes in climate on soil N mineralization, respiration and primary
production. 1998-present.
GLDN (Global Litter Decomposition Network). A network of studies examining how land use and
climate change affect litter decomposition under common conditions. 1996-present.
University of the Arctic Field Course. A 4-week modular field course designed to instruct U. S. and
foreign students on the complexity and sustainability of Arctic Ecosystems (approved and under
development as part of my NSF-BE project)
TIGER (Terrestrial Initiative for Global Environmental Research). A consortium program addressing
climate change processes in Western Europe. 1995-1998.
National Program Participation
27
1.
2.
3.
4.
North American Tundra Experiment (NATEX). A network of sites in North America (Northern
Ellesmere Island, Barrow, Alaska and Toolik Lake, Alaska) conducting comparative studies of Arctic
tundra responses to similar changes in climate. 1999-present.
BASIN (Biogeosphere-Atmosphere Stable Isotope Network) (http://basin.yolasite.com/). A consortium
of studies examining the 13C and 18O of CO2 and water as a means of characterizing the coupling of
carbon and water processes in terrestrial ecosystems. 2000-present.
USNIP (United States Network for Isotopes in Precipitation) (http://www.uaa.alaska.edu/enri/databases/
usnip/index.cfm). A national network that I have established examining the isotopes of water in
precipitation as applied to plant water sources, niche partitioning and palaeoclimatology. 1999-present.
AmeriFlux. A network of research sites quantifying the patterns of magnitudes of carbon exchange
between terrestrial ecosystems and the atmosphere (http://public.ornl.gov/ameriflux/). 1998-present.
Reviewer for Granting Agencies and Foundations
National Science Foundation (>100 proposals reviewed to date)
USDA-NRI (5 proposals reviewed to date)
STRATEGIC PLANNING, CONSORTIUM DEVELOPMENT, PARTNERSHIPS
AND SYNTHESIS ACTIVITIES
Strategic Planning
1.
Restructuring the Environment and Natural Resources Institute and creating an operational Strategic
Plan (2006-2007). Using faculty, staff and stakeholder participation, I have led the reorganizing of
ENRI at UAA. We are currently in the implementation phase of the plan
Consortiums
1.
2.
3.
4.
5.
6.
Migration distances of Arctic and Sub-Arctic caribou herds dictate their vulnerability to changes in
winter and summer climates. Collaboration between USFWS LCC Caribou Ecology programs in
Western and Arctic Alaska plus collaborations with colleagues in Norway and Canada. Macrosystems
Biology team. 2012.
3RIVERS: A Southcentral Alaska long-term research, education and outreach program. Collaboration
between UAA, Chugach National Forest, APU, USGS, NPS, USFWS. This program would compare
and contrast the ecohydrology of three adjoining watersheds: The 20-Mile, the Portage and the Placer.
Transitions in the Copper River watershed and adjoining marine system in Southcentral Alaska:
Workshops organization and program development leadership, (2007) Collaboration between UAA,
private and Native corporations, federal and state agencies, and UAF researchers.
IPY Snow-shrub interactions and feedbacks. A research team of UAA faculty addressing the role of
changes in snow on the processes governing shrub development and expansion in the Arctic. NSF IPY
funds acquired.
IPY-ITEX studies in the Pan Arctic. A research team of UAA and US scientists using long-term
warming experiments to identify what changes can be expected from climate warming in arctic and
alpine tundra. NSF IPY funds acquired.
Predator-prey dynamics in central Alaska: Proposal consortium of UAA and agency scientists designed
to address wolf-moose interaction in central Alaska. Initial discussions with USDA have taken place
and project development is underway.
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7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
Biocomplexity in arctic systems--University of Alaska Anchorage, University of Washington,
University of California. NSF-Biocomplexity in the Environment funds acquired.
Coupled changes in climate on mixed-grass prairie--Colorado State University & Agricultural Research
Service. USDA National Research Initiative funds acquired.
Carbon sequestration on temperate rangelands--University of Wyoming and Agricultural Research
Service (USDA). USDA funding obtained under the NRI-Soil and Soil Biology Program
Winter carbon flux in tundra habitats--University of Wyoming, California and Alaska. NSF-funding
obtained under OPP-ATLAS (Arctic transitions of the land-atmosphere system) program.
Species and tundra ecosystem responses to warming and increased snow--University of Wyoming,
Florida, Alaska, Michigan, British Columbia, and Woods Hole Institute. NSF-funding obtained under
the NATEX (North American Tundra Experiment) program.
Carbon flux on range and forested lands in Wyoming--University of Wyoming, U. S. Forest Service,
Bureau of Land Management, and Kirkbride Cattle and Land Company. NSF, Agricultural Experiment
Station and USFS funding obtained under the NSF-TECO (Terrestrial Ecology and Global Climate
Change) program.
U. S. Network of Isotopes in Precipitation--Colorado State University, University of Colorado, Illinois
State Water Survey and the National Atmospheric Deposition Program. NSF funding obtained under
the Earth System History Program and the GNIP (Global Network of Isotopes in Precipitation-IAEA)
program.
Plant-animal interactions in Rocky Mountain National Parks--University of Wyoming, Colorado State
University, Rocky Mountain National Park and Wind Cave National Park. USGS-BRD funding
obtained.
Moorland responses to climatic change--Merlewood Research Station, Manchester University,
Birmingham University, and Aberdeen University. NERC (Natural Environment Research Council)
funding obtained under the TIGER (Terrestrial Initiative for Global Environmental Research) program.
Comparative arctic tundra responses to changes in climate--Merlewood Research Station and the
University of Manchester. NERC funding obtained under the Arctic Ecology Special Topic.
Controls on woody seedling development on hardwood rangelands--University of California, UC Sierra
Field Station, Hopland Field Station. USDA and UC funding obtained under the UC Hardwood Range
Research Initiative.
NOTE: In each one of these cases I was instrumental in developing the program vision, organizing the
consortiums, developing and crafting the proposals, and implementing the projects.
Planning and Synthesis Activities
Diet Ecology of Svalbard Reindeer, November & December 2012
Comparative Carnivore Ecology in Alaska and Scandinavia, December 2012
Insect herbivory and food selection in response to experimental warming, December 2012
NEON Planning, Fairbanks, March 2010
NEON Planning; Las Cruces, NM, February 2006
NEON-Tundra-Taiga Planning; Anchorage, AK, March 2005
NSF Land-Atmosphere Ice Interactions: Terrestrial Ecosystems in the Arctic; Seattle, WA, January 2005
CORREO of the Consortium of Regional Representatives of NEON; Michigan, November 2005
Community of Scientific Practice, Synthesis and Integration, National Science Foundation, Arctic System
Science; Seattle, WA, Oct. 2004
Isotopic characteristics of Precipitation across North America, Biosphere-Atmosphere Stable Isotope
Network Annual Workshop; Pt. Reyes, CA
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NSF Arctic System Science Webinar: Open forum to discuss the future structure and function of the NSF
ARCSS program; November 2005
NEON, Isotope Workshop; Park City, UT, October 2004
BASIN Workshop; San Francisco, CA, October 2004
NEON, Rocky Mountain Group; Boulder, CO Spring, 2004
Isotopes in the Earth Sciences, Integrating water isotopes in General Circulation Models, National Center for
Atmospheric Research; Boulder, CO, January 2004
NIGEC (National Institute for Global Environmental Change-DOE) Soil Respiration Workshop; Boulder,
CO, October 2003
SEARCH, NSF Office of Polar Programs, Synthesis and Planning Workshop; Seattle, WA, October 2003
Biocomplexity in the Environment, Principle Investigator Synthesis and Future Directions; Washington DC,
September 2003
North American Carbon Program, Planning and research trajectories; Washington D.C., March 2003
International Tundra Experiment (ITEX), synthesis and future directions; Finse, Norway, October 2002
Arctic systems in transitions, NSF-Office of Polar Programs; Victoria, Canada, October 2002
Front Range Ecology, Systematics and Climate Observatory (FRESCO) proposal workshop for a National
Environmental Observatory Network (NEON); Denver Botanical Gardens, February, 2001
Future Arctic Research Initiatives: Planning and Implementation, LAII (Land-Atmosphere Ice Interactions)
meeting; Victoria, Canada, February 2001
Cross-College Life Sciences Program Development and Strategic Planning; University of Wyoming, 1999
Planning for the Toolik Lake Field Station Winter Residence; February, 1997
Toolik Lake Field Station: Planning for the 21st Century; Bodega Bay, CA, March 1995
An Arctic Laboratory for British Studies: Planning and implementation of the NERC Arctic Special Topic;
London, England, May 1991
Hardwood Range Programs for the State of California. California State Department of Forestry; Sacramento,
CA, 1986
PROFESSIONAL SOCIETIES
The Wildlife Society of America
American Geophysical Union
Ecological Society of America
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