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Overview of Sampled Lakes, Yukon Flats National Wildlife Refuge This dataset is a single comma-delimited text file (.csv). Data include the name of lakes where sampling occurred, approximate geographic coordinates of each lake, historical dynamics of the lake, and indication of measurements taken at the lake. Categories: Data; Tags: Alaska, Biogeochemical cycles, Biomass, Biomass dynamics, Biota, All tags... Community ecology, Environment, Landscape ecology, Primary production, Yukon Flats, Yukon Flats National Wildlife Refuge, Fewer tags Aboveground Net Primary Production Estimates from the Yukon Flats National Wildlife Refuge This dataset is a single comma-delimited text file (.csv). Data include the name of lakes where samples were obtained, the historical dynamics of that lake, the sampled community type, and the dry mass of annual new growth. Shrub community measurements are a combination of understory mass from quadrat harvests and shrub stem mass derived from published allometric equations. Categories: Data; Tags: Alaska, Biogeochemical cycles, Biomass, Biomass dynamics, Biota, All tags... Community ecology, Environment, Landscape ecology, Primary production, Terrestrial ecosystems, Wetland ecosystems, Yukon Flats, Yukon Flats National Wildlife Refuge, Fewer tags Soil Properties of Lake-Margin Wetlands of the Yukon Flats National Wildlife Refuge This dataset is a single comma-delimited text file (.csv). Data include the name of lakes where samples were obtained, soil pH, electrical conductivity (EC), water content (VWC), and bulk density (BD) of soil core samples within organic soil horizon in lake-margin wetland plant communities. Categories: Data; Tags: Alaska, Biogeochemical cycles, Biota, Environment, Lake drying, All tags... Landscape ecology, Nutrient cycling, Terrestrial ecosystems, Wetland ecosystems, Yukon Flats, Yukon Flats National Wildlife Refuge, Fewer tags Carbon and Nitrogen Content of Organic Soils in Lake-Margin Wetlands of the Yukon Flats National Wildlife Refuge This dataset is a single comma-delimited text file (.csv). Data include the name of lakes where samples were obtained, soil core dimensions, bulk density, and carbon/nitrogen content of soil core samples within the organic soil horizon in lake-margin wetland plant communities. Categories: Data; Tags: Alaska, Biogeochemical cycles, Biota, Carbon, Environment, All tags... Lake drying, Landscape ecology, Nitrogen, Nutrient cycling, Soil carbon storage, Terrestrial ecosystems, Wetland ecosystems, Yukon Flats, Yukon Flats National Wildlife Refuge, Fewer tags Soil flux (CO2, CH4), soil temperature, and soil moisture measurements at the Great Dismal Swamp National Wildlife Refuge (2015 - 2017) We identified nine study site locations, representing three mature vegetation communities [Atlantic White Cedar (desired community), tall pine pocosin (desired community), and red maple/black gum mixed (undesired community)] with typical water depth within each vegetation type. All measurements were replicated three times (3 vegetation types x 3 replicates = 9 sites total). We installed four flux chambers at each site to collect GHG fluxes from all nine sites. We measured CO2 and CH4 using a Los Gatos Research Ultra Portable Greenhouse Gas Analyzer and two-part 760 cm2 flux chambers (chamber base remained in situ; chamber top was placed on the bottom only when sampling). We checked the gas fluxes on a monthly time-table... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Ecology, Geochemistry, Great Dismal Swamp National Wildlife Refuge, Land Use Change, Soil Sciences, All tags... USGS Science Data Catalog (SDC), biogeochemical cycles, carbon, peatlands, soil, soil moisture/water content, terrestrial ecosystems, Fewer tags Biological Responses to Increasing Water Temperatures in Lakes of the Barrow/Atqasuk Focus Watershed: An Interdisciplinary Bioenergetics and Contamina There is currently have a very poor understanding of how climate change will affect food web structure and mercury accumulation in lakes on the Arctic Coastal Plain of Alaska. In this study, researchers are addressing this knowledge gap by adopting a space-for-time approach. Fish and food web ecology, and mercury accumulation patterns, are being investigated in several lakes that represent a gradient in temperature/ice phenology of up to two ice-free weeks and 10°C. They are also comparing food web structure and rates of mercury biomagnification among the lakes, and relating these to several climate variables. Finally, they are relating past trends in mercury accumulation in lake sediments to indices of lake productivity... Categories: Data, Project; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Academics & scientific researchers, BIOGEOCHEMICAL CYCLES, BIOGEOCHEMICAL CYCLES, CONTAMINANTS, CONTAMINANTS, All tags... Conservation Design, Federal resource managers, LAKES, LAKES, LCC Network Science Catalog, PERMAFROST MELT, PERMAFROST MELT, Project, SEDIMENTATION, SEDIMENTATION, Tribes, climatologyMeteorologyAtmosphere, climatologyMeteorologyAtmosphere, environment, environment, onGoing, Fewer tags Total carbon, organic carbon, and nitrogen data from a subset of soils within the Yukon River Basin Total and organic carbon values from soil samples taken from the Yukon River Basin, Alaska. These samples were used to create a relationship between total carbon and organic carbon for samples which were only run for total carbon. Categories: Data; Tags: Alaska, Biogeochemical cycles, Biota, Carbon, Environment, All tags... Inorganic carbon, Landscape ecology, Nitrogen, Nutrient cycling, Organic carbon, Terrestrial ecosystems, Wetland ecosystems, Yukon Flats, Yukon Flats National Wildlife Refuge, Fewer tags Soil Microbial Data from the Yukon Flats National Wildlife Refuge 2009 to 2012 This dataset includes soil properties and microbial data from lake margin soils throughout the Yukon Flats National Wildlife Refuge. Data include multiple lakes that are defined as either stable or drying. Lake margin vegetation communities include graminoid, shrub, and forest. Sols are separated into organic and mineral layers. Microbial data includes different phospholipid fatty acids and soil enzyme activity data for multiple enzymes involved in C,N, and P cycling. Data also includes information on respiration rate constants (k) and labile substrate pool (Ao) from soil incubations. Categories: Data; Tags: Alaska, Biogeochemical cycles, Biota, Carbon, Environment, All tags... Enzyme activity, Lake drying, Landscape ecology, Microbiology, Nitrogen, Nutrient cycling, PLFA, Phospholipid fatty acid, Soil carbon storage, Terrestrial ecosystems, Wetland ecosystems, Yukon Flats, Yukon Flats National Wildlife Refuge, Fewer tags Soil flux (CO2, CH4), soil temperature, and soil moisture measurements at the Great Dismal Swamp National Wildlife Refuge (2015 - 2017) We identified nine study site locations, representing three mature vegetation communities [Atlantic White Cedar (desired community), tall pine pocosin (desired community), and red maple/black gum mixed (undesired community)] with typical water depth within each vegetation type. All measurements were replicated three times (3 vegetation types x 3 replicates = 9 sites total). We installed four flux chambers at each site to collect GHG fluxes from all nine sites. We measured CO2 and CH4 using a Los Gatos Research Ultra Portable Greenhouse Gas Analyzer and two-part 760 cm2 flux chambers (chamber base remained in situ; chamber top was placed on the bottom only when sampling). We checked the gas fluxes on a monthly time-table... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Ecology, Geochemistry, Great Dismal Swamp National Wildlife Refuge, Land Use Change, Soil Sciences, All tags... USGS Science Data Catalog (SDC), biogeochemical cycles, carbon, peatlands, soil, soil moisture/water content, terrestrial ecosystems, Fewer tags