Native Water-milfoil Weevil
... Since it is not native to Wisconsin or the United States, it has very few natural predators. EWM can form thick underwater stands of tangled stems and vast mats of vegetation at the water’s surface. It can crowd out native plants and become so thick that the larger fish cannot swim through the tangl ...
... Since it is not native to Wisconsin or the United States, it has very few natural predators. EWM can form thick underwater stands of tangled stems and vast mats of vegetation at the water’s surface. It can crowd out native plants and become so thick that the larger fish cannot swim through the tangl ...
Evaluation of macrophyte control in 38
... stocking rates of these 38 lakes ranged from < 1 to 60 grass carp per hectare of lake and 1 to 208 grass carp per hectare of vegetation. Twenty lakes were stocked with less than 25 fish per hectare of vegetation. The stocked fish were all greater than 250 mm total length to help them avoid large pre ...
... stocking rates of these 38 lakes ranged from < 1 to 60 grass carp per hectare of lake and 1 to 208 grass carp per hectare of vegetation. Twenty lakes were stocked with less than 25 fish per hectare of vegetation. The stocked fish were all greater than 250 mm total length to help them avoid large pre ...
DISTRIBUTION AND ABUNDANCE OF NATIVE RAINBOW SMELT AND A Thesis Presented
... predation and competition, and the inherent web of other interactions that shape both relatively pristine and human dominated ecosystems. Changes in any one player can pull the strings of this web and cause effects that ripple outward in multiple directions. Thus, the addition of a non-native organi ...
... predation and competition, and the inherent web of other interactions that shape both relatively pristine and human dominated ecosystems. Changes in any one player can pull the strings of this web and cause effects that ripple outward in multiple directions. Thus, the addition of a non-native organi ...
The Impact of Zooplankton Grazing on Phytoplankton
... Grazing losses were estimated for several abundant species, for the phytoplankton divisions, and for the phytoplankton community as a whole. Separate estimates for micro- and macrozooplankton grazing were possible because the slope of the relationship between algal growth rate and grazer biomass was ...
... Grazing losses were estimated for several abundant species, for the phytoplankton divisions, and for the phytoplankton community as a whole. Separate estimates for micro- and macrozooplankton grazing were possible because the slope of the relationship between algal growth rate and grazer biomass was ...
Agate Hounds - Minnesota DNR
... Most of these agates sat locked inside lava rock during hundreds of millions of years of weathering and 2 million years of on-and-off glacial movement. Then about 15,000 years ago, toward the end of the last ice age, a glacier called the Superior lobe moved south from what is now Canada. This mounta ...
... Most of these agates sat locked inside lava rock during hundreds of millions of years of weathering and 2 million years of on-and-off glacial movement. Then about 15,000 years ago, toward the end of the last ice age, a glacier called the Superior lobe moved south from what is now Canada. This mounta ...
Phosphorus Provenance and Cladophora Growth in
... conditions and that the appropriate management focus for the nearshore is now tributary and point source discharges. Exchange through longshore transport As with offshore exchange, transport through longshore mass transport has the potential to deliver phosphorus to the Ajax, Ontario nearshore from ...
... conditions and that the appropriate management focus for the nearshore is now tributary and point source discharges. Exchange through longshore transport As with offshore exchange, transport through longshore mass transport has the potential to deliver phosphorus to the Ajax, Ontario nearshore from ...
Dodson et al. 2000
... cause they have been studied for two decades, and complete species lists exist for many kinds of organisms in these systems. LTER lake sites occur in northern and southern Wisconsin and northern Alaska (Toolik Lake). However, because there are fewer than 15 LTER lakes (and only seven with measured r ...
... cause they have been studied for two decades, and complete species lists exist for many kinds of organisms in these systems. LTER lake sites occur in northern and southern Wisconsin and northern Alaska (Toolik Lake). However, because there are fewer than 15 LTER lakes (and only seven with measured r ...
Phytoplankton ecology of subarctic lakes in Finnish Lapland
... subarctic Lake Saanajärvi. Characteristic phytoplankton species in this oligotrophic, dimictic lake belonged mainly to chrysophytes and diatoms. The maximum phytoplankton biomass in Lake Saanajärvi occurs during the autumn, while spring biomass is very low. During years with heavy snow cover the lak ...
... subarctic Lake Saanajärvi. Characteristic phytoplankton species in this oligotrophic, dimictic lake belonged mainly to chrysophytes and diatoms. The maximum phytoplankton biomass in Lake Saanajärvi occurs during the autumn, while spring biomass is very low. During years with heavy snow cover the lak ...
Abundance and diversity of sulphate
... Abstract: The depth distribution of sulphate-reducing bacteria (SRB) in the water column of a meromictic lake, Lake Suigetsu, Fukui, Japan was investigated using quantitative competitive PCR targeting the gene coding for portions of the a -subunit of dissimilatory sulphite reductase (dsrA). The tota ...
... Abstract: The depth distribution of sulphate-reducing bacteria (SRB) in the water column of a meromictic lake, Lake Suigetsu, Fukui, Japan was investigated using quantitative competitive PCR targeting the gene coding for portions of the a -subunit of dissimilatory sulphite reductase (dsrA). The tota ...
Document
... the Potamogetonaceae family. The genus Stuckenia is described as a perennial, from rhizomes; leaves alternate, submersed, filiform to narrowly ribbon like, with characteristic mid-vein, septate; flowers 4-merous, borne in spikes, usually floating on the water surface; fruit drupe-like (Crow and Hell ...
... the Potamogetonaceae family. The genus Stuckenia is described as a perennial, from rhizomes; leaves alternate, submersed, filiform to narrowly ribbon like, with characteristic mid-vein, septate; flowers 4-merous, borne in spikes, usually floating on the water surface; fruit drupe-like (Crow and Hell ...
Texas pH Evaluation Project - TIAER
... The State of Texas 2008 303(d) list (TCEQ 2008b) includes numerous water bodies reported as having pH exceedances, either above or below applicable pH criteria. Texas Surface Water Quality Standards require a majority of water bodies to maintain a pH range of 6.5-9.0 with a few exceptions (TNRCC 200 ...
... The State of Texas 2008 303(d) list (TCEQ 2008b) includes numerous water bodies reported as having pH exceedances, either above or below applicable pH criteria. Texas Surface Water Quality Standards require a majority of water bodies to maintain a pH range of 6.5-9.0 with a few exceptions (TNRCC 200 ...
pdf
... 100 µM), and humic acids (Sigma) (HA; 32 mg l–1) were added at various concentrations to separate treatments (noted in ‘Results’ where appropriate). DFB differs from the other chelators in that it is a siderophore isolated from terrestrial fungus and is highly specific for iron relative to other met ...
... 100 µM), and humic acids (Sigma) (HA; 32 mg l–1) were added at various concentrations to separate treatments (noted in ‘Results’ where appropriate). DFB differs from the other chelators in that it is a siderophore isolated from terrestrial fungus and is highly specific for iron relative to other met ...
Abundance and Structure of Microbial Loop Components (Bacteria
... top-down control by protistan grazing is an important regulator of the bacterial community, influencing their size-structure, taxonomic composition, and activity [24, ...
... top-down control by protistan grazing is an important regulator of the bacterial community, influencing their size-structure, taxonomic composition, and activity [24, ...
The effect of water column mixing on phytoplankton succession
... grow relatively slowly and are capable of buoyancy regulation to counteract turbulent conditions. It has been stated that it is not the intensity of turbulent mixing, but rather the depth of the mixed layer, that determines the algal loss due to sinking (Reynolds, 1989; Howarth et al., 1993). Since ...
... grow relatively slowly and are capable of buoyancy regulation to counteract turbulent conditions. It has been stated that it is not the intensity of turbulent mixing, but rather the depth of the mixed layer, that determines the algal loss due to sinking (Reynolds, 1989; Howarth et al., 1993). Since ...
Estimating future cyanobacterial occurrence and importance in lakes
... adaptive regression splines, MARS) (Leathwick et al. 2005) to predict of the future biomass. ...
... adaptive regression splines, MARS) (Leathwick et al. 2005) to predict of the future biomass. ...
Bythotrephes - Association for the Sciences of Limnology and
... area due to the high invasion rate of Bythotrephes in the past decade. The region also contains several noninvaded lakes allowing for comparisons between invaded and reference lakes. Ten invaded and 10 noninvaded lakes were initially chosen for the study in 2003. However, in six of the 10 noninvaded ...
... area due to the high invasion rate of Bythotrephes in the past decade. The region also contains several noninvaded lakes allowing for comparisons between invaded and reference lakes. Ten invaded and 10 noninvaded lakes were initially chosen for the study in 2003. However, in six of the 10 noninvaded ...
Longitudinal changes in the abundance of filter feeders and
... minated by hard-weathered silicate minerals and the calcium content is low. There are no man-made dams at the outlets and although rapids are separated by sec tions of slowly running water, all streams lack pools in the investigated reaches. The stream discharge in this geographical area generally ...
... minated by hard-weathered silicate minerals and the calcium content is low. There are no man-made dams at the outlets and although rapids are separated by sec tions of slowly running water, all streams lack pools in the investigated reaches. The stream discharge in this geographical area generally ...
Trophic structure, species richness and biodiversity in Danish lakes
... web. They also suggested that predatory control is high in oligotrophic lakes and low in eutrophic lakes, particularly because eutrophic lakes are typically dominated by cyanobacteria that are difficult for grazing zooplankton to handle. Elser & Goldman (1990) and Carney & Elser (1990) then develope ...
... web. They also suggested that predatory control is high in oligotrophic lakes and low in eutrophic lakes, particularly because eutrophic lakes are typically dominated by cyanobacteria that are difficult for grazing zooplankton to handle. Elser & Goldman (1990) and Carney & Elser (1990) then develope ...
Shallow Lowland Lakes Report – Estimates of Reference Conditions
... Reference condition is the condition of and ecosystem prior to significant human disturbance or alteration. It is useful for lake management and restoration to know the degree of departure of lakes in their current condition from their likely reference conditions. This provides an idea of the degree ...
... Reference condition is the condition of and ecosystem prior to significant human disturbance or alteration. It is useful for lake management and restoration to know the degree of departure of lakes in their current condition from their likely reference conditions. This provides an idea of the degree ...
Red Lake Peatlands
... significance and present a rare opportunity in Minnesota for landscape-scale conservation as well as for research on how peatlands develop. The southerly position of the Red Lake Peatland, just 50 miles from the prairie-forest border, makes it a bellwether for the impact of climate change on the wor ...
... significance and present a rare opportunity in Minnesota for landscape-scale conservation as well as for research on how peatlands develop. The southerly position of the Red Lake Peatland, just 50 miles from the prairie-forest border, makes it a bellwether for the impact of climate change on the wor ...
modeling wetland plant community response to assess water
... amplitude of water-level fluctuations that result in habitat development, and to the frequency of high and low water-level/flow events that determine cycling of habitat changes and result in habitat diversity. In the IJC Study, such quantitative relationships (metrics) linking various hydrologic to ...
... amplitude of water-level fluctuations that result in habitat development, and to the frequency of high and low water-level/flow events that determine cycling of habitat changes and result in habitat diversity. In the IJC Study, such quantitative relationships (metrics) linking various hydrologic to ...
In Situ Measurement of Dissolved Methane and Carbon Dioxide in
... tested the peak response of the UGGA to the injection of several CH4 and CO2 quantities, which is the core concept of the H-ICOS method. SI Figure S1A shows an example of the UGGA response to the triplicate injection of 5 mL nitrogen, containing 2 ppm of CH4, which corresponds to an injected quantit ...
... tested the peak response of the UGGA to the injection of several CH4 and CO2 quantities, which is the core concept of the H-ICOS method. SI Figure S1A shows an example of the UGGA response to the triplicate injection of 5 mL nitrogen, containing 2 ppm of CH4, which corresponds to an injected quantit ...
4th European Large Lakes Symposium
... Large lakes are not only exposed to multiple stressors but they are often iconic features in landscapes as well as often being flagship biosphere reserves for the conservation of freshwater species and habitats. To manage multiple stressors and multiple benefits raises a number of challenges. How do ...
... Large lakes are not only exposed to multiple stressors but they are often iconic features in landscapes as well as often being flagship biosphere reserves for the conservation of freshwater species and habitats. To manage multiple stressors and multiple benefits raises a number of challenges. How do ...
Decomposition and Utilization of Particulate Organic Matter by
... Enzymatic decomposition and bacterial utilization of various types of particulate and dissolved substrates was studied during spring-summer period in four lakes of Mazurian Lake District (Northern Poland). We found that seston particles, similarly as dissolved organic matter (DOM), undergo intensive ...
... Enzymatic decomposition and bacterial utilization of various types of particulate and dissolved substrates was studied during spring-summer period in four lakes of Mazurian Lake District (Northern Poland). We found that seston particles, similarly as dissolved organic matter (DOM), undergo intensive ...
Lake District
The Lake District, also known as The Lakes or Lakeland, is a mountainous region in North West England. A popular holiday destination, it is famous for its lakes, forests and mountains (or fells) and its associations with the early 19th century writings of William Wordsworth and the other Lake Poets.Historically split between Cumberland, Westmorland and Lancashire, the Lake District is now entirely in Cumbria. All the land in England higher than three thousand feet (914.4 m) above sea level lies within the National Park, including Scafell Pike, the highest mountain in England. It also contains the deepest and longest lakes in England, Wastwater and Windermere.