mantleplumes template.indd
... 2003a). What seems certain is that a Hawaii-style model for plate motion over a deeplyrooted and fixed plume is now untenable as an explanation for both the NAIP and Iceland. It appears possible to interpret the melting anomaly associated with formation of the NEA volcanic passive margin and present ...
... 2003a). What seems certain is that a Hawaii-style model for plate motion over a deeplyrooted and fixed plume is now untenable as an explanation for both the NAIP and Iceland. It appears possible to interpret the melting anomaly associated with formation of the NEA volcanic passive margin and present ...
journal.pone.0170
... provides measures of the energy transfer and trophic positions of individuals in natural communities [26]. The advantage by using stable isotopes is that they reflect the diet integrated over a longer period of time, whereas SCA only reveals which prey that recently have been ingested, although with ...
... provides measures of the energy transfer and trophic positions of individuals in natural communities [26]. The advantage by using stable isotopes is that they reflect the diet integrated over a longer period of time, whereas SCA only reveals which prey that recently have been ingested, although with ...
Yukon Coastal Plain Ecoregion
... Permafrost is continuous beneath the tundra of the Yukon Coastal Plain Ecoregion. Ground temperatures in an exploration well drilled by Imperial Oil near Blow River indicate the base of permafrost in eastern portions of the ecoregion is about 240 m deep (Fig. 21). Equilibrium nearsurface temperature ...
... Permafrost is continuous beneath the tundra of the Yukon Coastal Plain Ecoregion. Ground temperatures in an exploration well drilled by Imperial Oil near Blow River indicate the base of permafrost in eastern portions of the ecoregion is about 240 m deep (Fig. 21). Equilibrium nearsurface temperature ...
Biodiversity Research
... need to be networked with each other and with the eight biodiversity data nodes that already exist in Germany. This undertaking is supported not only by the DFG’s scientific programmes but also by its Library and Information Systems (LIS) programme. Better data provisioning was one of the key desira ...
... need to be networked with each other and with the eight biodiversity data nodes that already exist in Germany. This undertaking is supported not only by the DFG’s scientific programmes but also by its Library and Information Systems (LIS) programme. Better data provisioning was one of the key desira ...
Physical Characteristics of Arctic Fox (Alopex lagopus)
... well-known dens and included existing prey remains when defining den boundaries, so their results are not directly comparable to those from other regions, which are based on boundaries set by den entrances. Nevertheless, it appears there are substantial differences between regions as well. Both Macp ...
... well-known dens and included existing prey remains when defining den boundaries, so their results are not directly comparable to those from other regions, which are based on boundaries set by den entrances. Nevertheless, it appears there are substantial differences between regions as well. Both Macp ...
TAKE A LOOK at the Grayling Complaint filed by WWP ()
... and aesthetic benefits from the Montana fluvial Arctic grayling’s existence in the wild. Jasper Carlton, a member of the Center’s staff and former director of the Biodiversity Legal Foundation, which was incorporated into the Center, was the primary author of the petition to list the grayling as end ...
... and aesthetic benefits from the Montana fluvial Arctic grayling’s existence in the wild. Jasper Carlton, a member of the Center’s staff and former director of the Biodiversity Legal Foundation, which was incorporated into the Center, was the primary author of the petition to list the grayling as end ...
Limiting Factors in Caribou Population Ecology
... Factors responsible for population limitation and subsequent declines have been examined within the framework of animal population theory. There is, however, little agreement when factors limiting specific populations are generalized to Rangifer populations over broad geographic regions. Comparative ...
... Factors responsible for population limitation and subsequent declines have been examined within the framework of animal population theory. There is, however, little agreement when factors limiting specific populations are generalized to Rangifer populations over broad geographic regions. Comparative ...
Rate of recovery of lichen-dominated tundra vegetation after
... to a thin layer of fractured lichens and the general height of fruticose species (Cladina ssp.) everywhere was 0.5-1.5-2 cm, on the average 1.25 cm (Magomedova et Morozova 1997). For 13 years of recovery the increase in podetium height of fruticose lichens on the enclosed plots is revealed in compar ...
... to a thin layer of fractured lichens and the general height of fruticose species (Cladina ssp.) everywhere was 0.5-1.5-2 cm, on the average 1.25 cm (Magomedova et Morozova 1997). For 13 years of recovery the increase in podetium height of fruticose lichens on the enclosed plots is revealed in compar ...
EVPP 111 Lecture - Biomes
... – also known as northern coniferous forest, or boreal forest – precipitation is 25cm-100cm per year • climate is humid due to low evaporation resulting from generally low temperatures ...
... – also known as northern coniferous forest, or boreal forest – precipitation is 25cm-100cm per year • climate is humid due to low evaporation resulting from generally low temperatures ...
Prologue: On reindeer and men
... of reindeer management among the Skolt Lapps and their neighbours was not unique, but that it could be replicated in other societies practising what is commonly called a ranching economy. I realized, too, that the transition from pastoralism to ranching, which seemed to re-establish the ecological r ...
... of reindeer management among the Skolt Lapps and their neighbours was not unique, but that it could be replicated in other societies practising what is commonly called a ranching economy. I realized, too, that the transition from pastoralism to ranching, which seemed to re-establish the ecological r ...
Progress in Oceanography
... The most well-documented biological change that occurred during the warm event was the increased abundance of Atlantic cod off West Greenland. From the late 1910s to the early 1930s they not only increased in numbers but also spread gradually northward from near the southern tip of Greenland to Upern ...
... The most well-documented biological change that occurred during the warm event was the increased abundance of Atlantic cod off West Greenland. From the late 1910s to the early 1930s they not only increased in numbers but also spread gradually northward from near the southern tip of Greenland to Upern ...
Waterbird Abundance Waterbird Activity Budgets
... elsewhere. For Common Loons, Barr (1986) found that 33% more clutches hatched successfully in territories with water-level fluctuations less than 1.5 m. and Belant and Anderson (199la) reported nest failure when receding water levels increased the distance of the nest to water by 3 m. Loon nests awa ...
... elsewhere. For Common Loons, Barr (1986) found that 33% more clutches hatched successfully in territories with water-level fluctuations less than 1.5 m. and Belant and Anderson (199la) reported nest failure when receding water levels increased the distance of the nest to water by 3 m. Loon nests awa ...
Fact sheet summarizing all of the papers/data on drowning, starving
... The proportion of polar bear maternal dens on pack ice decreased between 1985 and 2005 in the Southern Beaufort Sea as fall ice freeze-up was delayed and stable ice and snow cover declined (Fischbach et al. 2007). Denning habitat along the Alaska coast is being threatened by increasing coastal e ...
... The proportion of polar bear maternal dens on pack ice decreased between 1985 and 2005 in the Southern Beaufort Sea as fall ice freeze-up was delayed and stable ice and snow cover declined (Fischbach et al. 2007). Denning habitat along the Alaska coast is being threatened by increasing coastal e ...
thesis_introduction
... Arctic than in any other region on the globe and predictions suggest that the degree of change is expected to be the greatest in this biome. The Northern Barents Region, including the waters surrounding the Svalbard Archipelago, has experienced the most dramatic environmental changes recorded to dat ...
... Arctic than in any other region on the globe and predictions suggest that the degree of change is expected to be the greatest in this biome. The Northern Barents Region, including the waters surrounding the Svalbard Archipelago, has experienced the most dramatic environmental changes recorded to dat ...
Chapter 3
... 300 days, pption .75 to 1.5 mts, good amount of light reaches the ground Permanent residents: certain salamanders (Plethodontidae), skinks (Eumeces spp), garter snakes (Thamnophis spp), turkeys (Meleagris gallopavo), pileated woodpecker (Hylatomus pileatus), squirrels (Sciurus spp), bobcats (Lynx ru ...
... 300 days, pption .75 to 1.5 mts, good amount of light reaches the ground Permanent residents: certain salamanders (Plethodontidae), skinks (Eumeces spp), garter snakes (Thamnophis spp), turkeys (Meleagris gallopavo), pileated woodpecker (Hylatomus pileatus), squirrels (Sciurus spp), bobcats (Lynx ru ...
as a PDF
... Role of food in hare population cycles Lloyd B. Keith Keith, L. B. 1983. Role of food in hare population cycles. - Oikos 40: 385-395. The snowshoe hare has a well-documented 10-yr cycle in North America's Boreal Forest; the Arctic hare probably has cyclic fluctuations of comparable periodicity, ampl ...
... Role of food in hare population cycles Lloyd B. Keith Keith, L. B. 1983. Role of food in hare population cycles. - Oikos 40: 385-395. The snowshoe hare has a well-documented 10-yr cycle in North America's Boreal Forest; the Arctic hare probably has cyclic fluctuations of comparable periodicity, ampl ...
EDMUND RICE INTERNATIONAL (ERI) Biodiversity and Human Rig
... ecosystem changes, and often reaches a new dynamic balance. Sometimes it is permanently damaged2, sometimes it is partially destroyed3, sometimes it is replaced by an artificial ecosystem, maintained by humans4. In each case, biodiversity is reduced, usually severely. Small low-density stable human ...
... ecosystem changes, and often reaches a new dynamic balance. Sometimes it is permanently damaged2, sometimes it is partially destroyed3, sometimes it is replaced by an artificial ecosystem, maintained by humans4. In each case, biodiversity is reduced, usually severely. Small low-density stable human ...
Biomes Section 1
... • Explain how temperature and precipitation determine which plants grow in an area. • Explain how latitude and altitude affect which plants grow in an area. ...
... • Explain how temperature and precipitation determine which plants grow in an area. • Explain how latitude and altitude affect which plants grow in an area. ...
Frontiers in Polar Biology - Division on Earth and Life Studies
... spark our curiosity: How can a hibernating mammal survive when its body temperature plunges below freezing during a long polar winter? Why does the blood of polar fish remain in the liquid state at sub-zero temperatures? Although these species have been the subject of research for several decades, t ...
... spark our curiosity: How can a hibernating mammal survive when its body temperature plunges below freezing during a long polar winter? Why does the blood of polar fish remain in the liquid state at sub-zero temperatures? Although these species have been the subject of research for several decades, t ...
Ecological monitoring in Cambridge Bay
... Fig. 2.1. NMDS ordination of the spider community across all replicates and time periods using the log values of species relative abundance. Each point indicates the location of a sampled microhabitat: where the triangles denote the two dry ecosites and the squares denote the two wet habitats. Point ...
... Fig. 2.1. NMDS ordination of the spider community across all replicates and time periods using the log values of species relative abundance. Each point indicates the location of a sampled microhabitat: where the triangles denote the two dry ecosites and the squares denote the two wet habitats. Point ...
Print
... Unsustainable and non-traditional hunting may have an impact on narwhal populations, especially the smaller ones. Currently, only Inuit may hunt narwhal for subsistence, and they do so within a quota, or maximum number of catches. Recently, this type of management has been evolving towards a communi ...
... Unsustainable and non-traditional hunting may have an impact on narwhal populations, especially the smaller ones. Currently, only Inuit may hunt narwhal for subsistence, and they do so within a quota, or maximum number of catches. Recently, this type of management has been evolving towards a communi ...
The Boreal biogeographical region
... In parts of the region the land uplift is still occurring at a rate of nearly 1 cm per year (http://www.sgu.se/search/index.htm search: uplift). It is felt mostly along the northern very shallow coast of the Baltic Sea, where strips of land gradually emerge from the sea, broad enough to induce cattl ...
... In parts of the region the land uplift is still occurring at a rate of nearly 1 cm per year (http://www.sgu.se/search/index.htm search: uplift). It is felt mostly along the northern very shallow coast of the Baltic Sea, where strips of land gradually emerge from the sea, broad enough to induce cattl ...
Reports
... and arctic habitats (Hultén 1959). The northern European Dryas heaths may be characterized as biodiversity hotspots relative to other alpine plant communities in this region. Dryas may be a key species with both negative and positive impacts on ecosystem carbon gain (Welker et al. 1997), population ...
... and arctic habitats (Hultén 1959). The northern European Dryas heaths may be characterized as biodiversity hotspots relative to other alpine plant communities in this region. Dryas may be a key species with both negative and positive impacts on ecosystem carbon gain (Welker et al. 1997), population ...
presentation source
... July), except under more severe drought conditions. There are portions of this location whose annual NDVI values more closely resemble those of prairie grasslands, while other fractions appear as denser forest stands similar to those represented by the first boreal endmember. Thus, based on the temp ...
... July), except under more severe drought conditions. There are portions of this location whose annual NDVI values more closely resemble those of prairie grasslands, while other fractions appear as denser forest stands similar to those represented by the first boreal endmember. Thus, based on the temp ...
Canada Of lemmings and snowshoe hares: the
... The structure of these two northern ecosystems is most readily seen in the food web for each (figure 1). One of the main jobs of ecologists is to understand the structure of food webs of these types by measuring the strength of the interactions between species and in particular to discover the relat ...
... The structure of these two northern ecosystems is most readily seen in the food web for each (figure 1). One of the main jobs of ecologists is to understand the structure of food webs of these types by measuring the strength of the interactions between species and in particular to discover the relat ...
Arctic ecology
Arctic ecology is the scientific study of the relationships between biotic and abiotic factors in the arctic, the region north of the Arctic Circle (66 33’). This is a region characterized by stressful conditions as a result of extreme cold, low precipitation, a limited growing season (50–90 days) and virtually no sunlight throughout the winter. The Arctic consists of taiga (or boreal forest) and tundra biomes, which also dominate very high elevations, even in the tropics. Sensitive ecosystems exist throughout the Arctic region, which are being impacted dramatically by global warming. The earliest inhabitants of the Arctic were the Neanderthals. Since then, many indigenous populations have inhabited the region, which continues to this day. Since the early 1900s, when Vilhjalmur Stefansson led the first major Canadian Arctic Expedition, the Arctic has been a valued area for ecological research. In 1946, The Arctic Research Laboratory was established in Point Barrow, Alaska under the contract of the Office of Naval Research. This launched an interest in exploring the Arctic examining animal cycles, permafrost and the interactions between indigenous peoples and the Arctic ecology. During the Cold War, the Arctic became a place where the United States, Canada, and the Soviet Union performed significant research that has been essential to the study of climate change in recent years. A major reason why research in the Arctic is essential for the study of climate change is because the effects of climate change will be felt more quickly and more drastically in higher latitudes of the world as above average temperatures are predicted for Northwest Canada and Alaska. From an anthropological point of view, researchers study the native Inuit peoples of Alaska as they have become extremely accustomed to adapting to ecological and climate variability.