Filters: Tags: Kabetogama Lake (X)
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The U.S. Geological Survey, Voyageurs National Park, South Dakota State University, and Missouri Department of Conservation conducted a cooperative study to measure ratios of strontium to calcium (Sr:Ca) in cross sections of pectoral fin rays obtained from lake sturgeon (Acipenser fulvescens) captured in lakes and rivers of Namakan Reservoir in Minnesota and Ontario. We measured Sr:Ca ratios in cross sections of 37 pectoral fin rays collected from 10 locations (5 rivers and 5 lakes) in Namakan Reservoir as part of a larger study to investigate whether relations between Sr:Ca in water and pectoral fin rays were significant and useful for determining migratory histories of lake sturgeon in Namakan Reservoir. Pectoral...
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Aquatic Biology,
Crane Lake,
Echo River,
Ecology,
Hydrology,
These data tables summarize land cover classifications, slope measurements, and inundated area estimates for several lakes in northern Minnesota, as part of a larger project seeking to identify associations between young-of-year Yellow Perch mercury content and water level metrics, temperature, and annual deposition data in a multivariate analysis. One table presents inundated area estimates for a range of water surface elevations in 0.1 meter increments between a range of seasonal minimum and maximum water surface elevation values. The other table summarizes the percent cover and number of hectares of each land cover class within a specified buffered area around each study sampling site, along with a measure of...
Categories: Data;
Tags: Crane Lake,
Kabetogama Lake,
Little Vermilion Lake,
Minnesota,
Namakan Lake,
Water level fluctuations substantially alter the fauna, flora and microbial community of near-shore aquatic ecosystems. Water level management therefore has the potential to strongly influence a wide variety of ecosystem processes. Many northern temperate lake food webs experience substantial methylmercury contamination, which is partially mediated by the action of sulfate reducing bacteria occurring in sediments that are periodically inundated. For lakes with methylmercury problems, water level management could be designed to reduce methylmercury contamination. These data summarize inundated areas at varying water surface elevations for several northern Minnesota lakes, as part of the project described above. The...
This data release provides phytoplankton identification, phytoplankton enumeration, chlorophyll concentration, phaeophytin concentration, phycocyanin data, and nutrient quality assurance data from three recurring algal bloom sites in Kabetogama Lake, Voyaguers National Park, Minnesota in 2016 and 2017. The goal of this research is to better understand the drivers of algal bloom toxicity in the large lakes of Voyageurs National Park so that resource managers may better predict, manage, and mitigate the occurrence of harmful algal blooms. A total of 126 environmental samples were collected at three recreational areas where blooms frequently occur. One site, Sullivan Bay, was chosen for more intensive sampling, including...
Water level fluctuations substantially alter the fauna, flora and microbial community of near-shore aquatic ecosystems. Water level management therefore has the potential to strongly influence a wide variety of ecosystem processes. Many northern temperate lake food webs experience substantial methylmercury contamination, which is partially mediated by the action of sulfate reducing bacteria occurring in sediments that are periodically inundated. For lakes with methylmercury problems, water level management could be designed to reduce methylmercury contamination. These data summarize land cover and slope characteristics within specified, buffered areas around study sites that were sampled in several northern Minnesota...
Categories: Data;
Tags: Crane Lake,
Kabetogama Lake,
Little Vermilion Lake,
Minnesota,
Namakan Lake,
Multiple linear regression models were developed using data collected in 2016 and 2017 from three recurring bloom sites in Kabetogama Lake in northern Minnesota. These models were developed to predict concentrations of cyanotoxins (anatoxin-a, microcystin, and saxitoxin) that occur within the blooms. Virtual Beach software (version 3.0.6) was used to develop four models: two cyanotoxin mixture (MIX) models and two microcystin (MC) models. Models include those using readily available environmental variables (for example, wind speed and specific conductance) and those using additional comprehensive variables (based on laboratory analyses). Many of the independent variables were averages over a certain time period...
Categories: Data;
Tags: Kabetogama Lake,
Koochiching County Minnesota,
Minnesota,
USGS Science Data Catalog (SDC),
Voyageurs National Park,
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