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Water-quality and streamflow datasets used in the Weighted Regressions on Time, Discharge, and Season (WRTDS) models to determine trends in the Nation’s rivers and streams, 1972-2012(output) In 1991, the U.S. Geological Survey (USGS) began a study of more than 50 major river basins across the Nation as part of the National Water-Quality Assessment (NAWQA) project of the National Water-Quality Program. One of the major goals of the NAWQA project is to determine how water-quality conditions change over time. To support that goal, long-term consistent and comparable monitoring has been conducted on streams and rivers throughout the Nation. Outside of the NAWQA project, the USGS and other Federal, State, and local agencies also have collected long-term water-quality data to support their own assessments of changing water-quality conditions. Data from these multiple sources have been combined to support... Categories: Data; Types: Citation; Tags: Puerto Rico, United States, WRTDS, carbon, discharge, All tags... nutrients, rivers, salinity, sediment, trends, usgsnawqaswtrends, weighted regression, Fewer tags Effects of food resources on fatty acid composition, growth and survival of freshwater mussels Increased nutrient and sediment loading have caused observable changes in algal community composition, and thereby, altered the quality and quantity of food resources available to native freshwater mussels. Our objective was to characterize the relationship between nutrient conditions and mussel food quality and examine the effects on the fatty acid composition, growth and survival of juvenile mussels. Juvenile Lampsilis cardium and L. siliquoidea were deployed in cages for 28 d at four riverine and four lacustrine sites in the lower St. Croix River, Minnesota/Wisconsin, USA. Mussel foot tissue and food resources (four seston fractions and surficial sediment) were analyzed for quantitative fatty acid (FA) composition.... Categories: Data; Types: Citation; Tags: Mississippi River, Prescott, WI, St Croix Falls, WI, St Croix River, St Croix River, All tags... USGS Science Data Catalog (SDC), fatty acid composition, food resources, freshwater mussels, nutrients, sediment, survival and growth, Fewer tags USGS Measurements of Water Quality in San Francisco Bay (CA), 1969-2015 (ver. 4.0, March 2023) The U.S. Geological Survey maintains a program of water-quality studies in San Francisco Bay (CA) that began in 1969. This USGS data release archives and makes available all measurements from 1969-2015. Water-quality constituent measurements include salinity, temperature, light attenuation coefficient, and concentrations of chlorophyll-a, dissolved oxygen, suspended particulate matter, and dissolved inorganic nutrients (nitrate, nitrite, ammonium, phosphate and silicate). Since the mid-1990s, sampling was conducted at least monthly at 37 fixed sampling locations along a 145-km transect from lower South San Francisco Bay to the lower Sacramento River. A map and table of sampling locations are included in the Attached... Categories: Data; Types: Citation; Tags: San Francisco Bay, California, USGS Science Data Catalog (SDC), chlorophyll-a, dissolved oxygen, nutrients, All tags... salinity, temperature, turbidity, water quality, Fewer tags Chesapeake Bay Nontidal Network 1985-2016: Short- and long-term trends Nitrogen, phosphorus, and suspended-sediment loads, and changes in loads, in rivers across the Chesapeake Bay watershed have been calculated using monitoring data from the Chesapeake Bay Nontidal Network (NTN) stations for the period 1985 through 2016. Nutrient and suspended-sediment loads and changes in loads were determined by applying a weighted regression approach called WRTDS (Weighted Regression on Time, Discharge, and Season). The load results represent the total mass of nitrogen, phosphorus, and suspended sediment that was exported from each of the NTN watersheds. To determine the trend in loads, the annual load results are flow normalized to integrate out the year-to-year variability in river discharge.... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Chesapeake Bay Watershed, Delaware, Maryland, New York, Pennsylvania, All tags... United States, Virginia, WRTDS, Washington DC, West Virginia, load analysis, nitrogen, nutrients, phosphorus, rivers, suspended sediment, trends, water quality, weighted regression, Fewer tags Linking Excess Nutrients, Light, and Fine Bedded Sediments to Impacts on Faunal Assemblages in Headwater Agricultural Streams1 Griffith, Michael B., F. Bernard Daniel, Matthew A. Morrison, Michael E. Troyer, James M. Lazorchak, and Joseph P. Schubauer-Berigan, 2009. Linking Excess Nutrients, Light, and Fine Bedded Sediments to Impacts on Faunal Assemblages in Headwater Agricultural Streams. Journal of the American Water Resources Association (JAWRA) 45(6):1475-1492. Abstract: Biological impairments in streams are typically defined by regulatory agencies in terms of altered invertebrate or fish assemblages. While nutrients, canopy cover, and sediment fines contribute to these impairments, these stressors are often defined, at least in part, by their impacts on periphyton. Path analysis can extend these assessments to impacts on invertebrates... Categories: Publication; Types: Citation; Tags: Data Visualization & Tools, Landscapes, Northeast CASC, Other Landscapes, Science Tools For Managers, All tags... canopy cover, direct and indirect impacts, fish, macroinvertebrates, nutrients, path analysis, periphyton, sediment fines, Fewer tags High Resolution Vegetation Mapping of the Alaska Peninsula and Unimak Island The tundra biome is the dominant terrestrial ecosystem of the circumpolar north, and its fate in a rapidly changing climate is of high scientific and socioeconomic concern. One of those concerns is that the majority of caribou herds throughout the circumpolar north are declining, perhaps as a result of climate change. The principal objective of this research is to reveal the connections between soil nutrient cycling, forage quality and caribou habitat selection. This framework is underpinned by the concept that tundra ecosystem productivity is ultimately driven by the thermodynamics of the system induced by climate. Categories: Data, Publication; Types: Citation; Tags: ALPINE/TUNDRA, ALPINE/TUNDRA, CARBON, CARBON, CARBON CYCLE/CARBON BUDGET MODELS, All tags... CARBON CYCLE/CARBON BUDGET MODELS, EVEN-TOED UNGULATES, EVEN-TOED UNGULATES, Federal resource managers, HERBIVORY, HERBIVORY, LANDSCAPE PROCESSES, LANDSCAPE PROCESSES, LCC Network Science Catalog, LICHENS, LICHENS, NITROGEN, NITROGEN, NITROGEN, NITROGEN, NUTRIENTS, NUTRIENTS, ORGANIC MATTER, ORGANIC MATTER, Publication, SOIL ABSORPTION, SOIL ABSORPTION, SOIL FERTILITY, SOIL FERTILITY, SOIL PRODUCTIVITY, SOIL PRODUCTIVITY, SOIL RESPIRATION, SOIL RESPIRATION, SOIL TEMPERATURE, SOIL TEMPERATURE, State agencies, Tribes, VEGETATION COVER, VEGETATION COVER, VEGETATION COVER, VEGETATION COVER, Western Alaska Landscape Conservation Cooperative data.gov, biota, biota, environment, environment, onGoing, Fewer tags Influence of reservoirs on solute transport: a regional-scale approach Regional transport of water and dissolved constituents through heavily regulated river systems is influenced by the presence of reservoirs. Analysis of seasonal patterns in solute fluxes for salinity and nutrients indicates that in-reservoir processes within large storage reservoirs in the Rio Grande and Colorado basins (southwestern USA) are superimposed over the underlying watershed processes that predominate in relatively unregulated stream reaches. Connectivity of the aquatic system with the landscape is apparently disrupted by processes within the reservoir systems; these processes result in large changes in characteristics for solute transport that persist downstream in the absence of significant inputs. Additionally,... Categories: Publication; Types: Citation, Journal Citation; Tags: Hydrological Processes, connectivity, nutrients, regulated rivers, reservoirs, All tags... salinity, transport, Fewer tags Estimates of soil ingestion by wildlife Many wildlife species ingest soil while feeding, but ingestion rates are known for only a few species. Knowing ingestion rates may be important for studies of environmental contaminants. Wildlife may ingest soil deliberately, or incidentally, when they ingest soil-laden forage or animals that contain soil. We fed white-footed mice (Peromyscus leucopus) diets containing 0-15% soil to relate the dietary soil content to the acid-insoluble ash content of scat collected from the mice. The relation was described by an equation that required estimates of the percent acid-insoluble ash content of the diet, digestibility of the diet, and mineral content of soil. We collected scat from 28 wildlife species by capturing animals,... Categories: Publication; Types: Citation, Journal Citation; Tags: JSTOR, Journal of Wildlife Management, contaminants, diet, nutrients, All tags... risk assessment, scat, sediments, soil ingestion, Fewer tags Direct Effects of Soil Amendments on Field Emergence and Growth of the Invasive Annual Grass Bromus tectorum L. and the Native Perennial Grass Hilaria jamesii (Torr.) Benth Bromus tectorum L. is a non-native, annual grass that has invaded western North America. In SE Utah, B. tectorum generally occurs in grasslands dominated by the native perennial grass, Hilaria jamesii (Torr.) Benth. and rarely where the natives Stipa hymenoides Roem. and Schult. and S. comata Trin. & Rupr. are dominant. This patchy invasion is likely due to differences in soil chemistry. Previous laboratory experiments investigated using soil amendments that would allow B. tectorum to germinate but would reduce B. tectorum emergence without affecting H. jamesii. For this study we selected the most successful treatments (CaCl2, MgCl2, NaCl and zeolite) from a previous laboratory study and applied them in the field... Categories: Publication; Types: Citation, Journal Citation; Tags: Plant and Soil, Springer Netherlands, amendments, invasion, nutrients, All tags... salt, soil chemistry, Fewer tags The National Stream Quality Accounting Network: a flux-based approach to monitoring the water quality of large rivers Estimating the annual mass flux at a network of fixed stations is one approach to characterizing water quality of large rivers. The interpretive context provided by annual flux includes identifying source and sink areas for constituents and estimating the loadings to receiving waters, such as reservoirs or the ocean. Since 1995, the US Geological Survey's National Stream Quality Accounting Network (NASQAN) has employed this approach at a network of 39 stations in four of the largest river basins of the USA: the Mississippi, the Columbia, the Colorado and the Rio Grande. In this paper, the design of NASQAN is described and its effectiveness at characterizing the water quality of these rivers is evaluated using data... Categories: Publication; Types: Citation, Journal Citation; Tags: Hydrological Processes, NASQAN, flux, networks, nutrients, All tags... pesticides, rivers, sediment, water quality, Fewer tags Water-quality and streamflow datasets used in Seasonal Kendall trend tests for the Nation’s rivers and streams, 1972-2012 (output) In 1991, the U.S. Geological Survey (USGS) began a study of more than 50 major river basins across the Nation as part of the National Water-Quality Assessment (NAWQA) project of the National Water-Quality Program. One of the major goals of the NAWQA project is to determine how water-quality conditions change over time. To support that goal, long-term consistent and comparable monitoring has been conducted on streams and rivers throughout the Nation. Outside of the NAWQA project, the USGS and other Federal, State, and local agencies also have collected long-term water-quality data to support their own assessments of changing water-quality conditions. Data from these multiple sources have been combined to support... Types: Citation; Tags: Puerto Rico, Seasonal Kendall, United States, carbon, nutrients, All tags... rivers, salinity, sediment, trends, usgsnawqaswtrends, Fewer tags Stormwater contaminant loading following southern California wildfires Synopsis: The goal of this study was to examine contaminant loadings associated with stormwater runoff from recently burned areas in urban fringe areas of southern California, to derive regional patterns of runoff and contaminant loadings in this context. Postfire stormwater runoff was sampled from five wildfires that each burned between 115 and 658 km2 of natural open space between 2003 and 2009. The area is characterized by classic Mediterranean climate conditions of relatively mild to cool wet winter and warm to hot dry summers. Between two and five storm events were sampled per site over the first one to two years following the fires for basic constituents, metals, nutrients, total suspended solids, and polycyclic... Categories: Publication; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: California, California Coastal Sage, Chaparral, Forest, Land use configuration, All tags... Natural cover amount, Oak Woodlands, Southern and Baja California Pine-Oak Mountains, air quality, contaminant loading, fire effects, fire patches, forest fire, metals, nutrients, polyaromatic hydrocarbons, regional, storm-water runoff, urban fringe, water quality, woodlands, Fewer tags Cyanobacterial inoculation of heated soils: effect on microorganisms of C and N cycles and on chemical composition in soil surface Physiological groups of soil microorganisms, total C and N and available nutrients were investigated in four heated (350 °C, 1 h) soils (one Ortic Podsol over sandstone and three Humic Cambisol over granite, schist or limestone) inoculated (1.5 μg chlorophyll a g−1 soil or 3.0 μg chlorophyll a g−1 soil) with four cyanobacterial strains of the genus Oscillatoria, Nostoc or Scytonema and a mixture of them. Cyanobacterial inoculation promoted the formation of microbiotic crusts which contained a relatively high number of NH4+-producers (7.4×109 g−1 crust), starch-mineralizing microbes (1.7×108 g−1 crust), cellulose-mineralizing microbes (1.4×106 g−1 crust) and NO2− and NO3− producers... Categories: Publication; Types: Citation, Journal Citation; Tags: Burning, C and N cycling microorganisms, Fire, Microbiota, Microbiotic crusts, All tags... Nutrients, Reclamation, Soil Biology and Biochemistry, Fewer tags Treatment effects on performance of N-fixing lichens in disturbed soil crusts of the Colorado Plateau Biological soil crusts arrest soil erosion and supply nitrogen to arid ecosys- tems. To understand their recovery from disturbance, we studied performances of Collema spp. lichens relative to four experimental treatments plus microtopography of soil pedicels, oriented north-northwest to south-southeast in crusts. At sites in Needles (NDLS) and Island in the Sky (ISKY) districts of Canyonlands National Park, lichens were transplanted to NNW, SSE, ENE, WSW, and TOP pedicel faces and exposed to a full-factorial, randomized block experiment with four treatments: nutrient addition (P and K), soil stabilization with polyacrylamide resin (PAM), added cyanobacterial fiber, and biweekly watering. After 14.5 mo (NDLS) and... Categories: Publication; Types: Citation, Journal Citation; Tags: Collema, Colorado Plateau, Ecological Applications, Microcoleus vaginatus, Utah, All tags... biological soil crusts, cryptobiotic crusts, cyanobacteris, lichen, microbiotic crusts, microtopography, nutrients, Fewer tags The Effects of Elevated CO2 on Nutrient Distribution in a Fire-Adapted Scrub Oak Forest Elevated carbon dioxide (CO2) caused greater accumulation of carbon (C) and nutrients in both vegetation and O horizons over a 5-yr sampling period in a scrub oak ecosystem in Florida. Elevated CO2 had no effect on any measured soil property except extractable phosphorus (P), which was lower with elevated CO2 after five years. Anion and cation exchange membranes showed lower available nitrogen (N) and zinc (Zn) with elevated CO2. Soils in both elevated and ambient CO2 showed decreases in total C, N, sulfur (S), and cation exchange capacity, and increases in base saturation, exchangeable Ca2+, and Mg2+ over the 5-yr sampling period. We hypothesize that these soil changes were a delayed response to prescribed fire,... Categories: Publication; Types: Citation, Journal Citation; Tags: CO2, Ecological Applications, Ecological Society of America, Florida, O horizon, All tags... elevated, fire, nutrients, scrub oak, soils, uptake., Fewer tags Water-quality and streamflow datasets used in Seasonal Kendall trend tests for the Nation’s rivers and streams, 1972-2012 In 1991, the U.S. Geological Survey (USGS) began a study of more than 50 major river basins across the Nation as part of the National Water-Quality Assessment (NAWQA) project of the National Water-Quality Program. One of the major goals of the NAWQA project is to determine how water-quality conditions change over time. To support that goal, long-term consistent and comparable monitoring has been conducted on streams and rivers throughout the Nation. Outside of the NAWQA project, the USGS and other Federal, State, and local agencies also have collected long-term water-quality data to support their own assessments of changing water-quality conditions. Data from these multiple sources have been combined to support... Categories: Data; Types: Citation; Tags: National Water Quality Program, Puerto Rico, Seasonal Kendall, USGS Science Data Catalog (SDC), United States, All tags... Water Quality, carbon, nutrients, rivers, salinity, sediment, trends, usgsnawqaswtrends, Fewer tags Water-quality and streamflow datasets used in Seasonal Kendall trend tests for the Nation’s rivers and streams, 1972-2012 (input) In 1991, the U.S. Geological Survey (USGS) began a study of more than 50 major river basins across the Nation as part of the National Water-Quality Assessment (NAWQA) project of the National Water-Quality Program. One of the major goals of the NAWQA project is to determine how water-quality conditions change over time. To support that goal, long-term consistent and comparable monitoring has been conducted on streams and rivers throughout the Nation. Outside of the NAWQA project, the USGS and other Federal, State, and local agencies also have collected long-term water-quality data to support their own assessments of changing water-quality conditions. Data from these multiple sources have been combined to support... Categories: Data; Types: Citation; Tags: Puerto Rico, Seasonal Kendall, United States, carbon, nutrients, All tags... rivers, salinity, sediment, trends, usgsnawqaswtrends, Fewer tags Water-quality trends and trend component estimates for the Nation's rivers and streams using Weighted Regressions on Time, Discharge, and Season (WRTDS) models and generalized flow normalization, 1972-2012 Nonstationary streamflow due to environmental and human-induced causes can affect water quality over time, yet these effects are poorly accounted for in water-quality trend models. This data release provides instream water-quality trends and estimates of two components of change, for sites across the Nation previously presented in Oelsner et al. (2017). We used previously calibrated Weighted Regressions on Time, Discharge, and Season (WRTDS) models published in De Cicco et al. (2017) to estimate instream water-quality trends and associated uncertainties with the generalized flow normalization procedure available in EGRET version 3.0 (Hirsch et al., 2018a) and EGRETci version 2.0 (Hirsch et al., 2018b). The procedure... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Contiguous United States and Puerto Rico, USGS Science Data Catalog (SDC), United States, biota, carbon, All tags... concentration, loads (fluxes), major ions, nutrients, rivers, salinity, sediment, streams, surface water quality, water-quality trends, Fewer tags Water quality in the Elwha River estuary, Washington, from 2006 to 2014. This portion of the data release presents water column dissolved nutrient concentration data and water quality parameters from samples collected in the Elwha River estuary, Washington, in 2006, 2007, 2013, and 2014 (USGS Field Activities L-15-13-PS, L-24-13-PS, T-R5-13-PS, T-R6-13-PS, T-RA-14-PS, 2014-614-FA, 2014-628-FA, 2014-633-FA, 2014-666-FA). Water column samples were collected by hand in acid-washed opaque bottles from multiple locations. Water quality was measured using a handheld Hydolab Data Sonde 4a. The locations of water sample collections were determined with a hand-held global positioning system (GPS). The water samples were filtered through GF/F filters immediately after collection. The filtrate... Categories: Data; Types: Citation; Tags: Clallam County, Elwha River, Olympic Peninsula, Strait of Juan de Fuca, marine chemistry, All tags... nutrients, oceans, water quality, water quality, water-quality parameters, Fewer tags Discrete water-quality data for the Kansas River and tributaries, July 2012 - September 2016 This U.S. Geological Survey (USGS) Data Release provides discrete water-quality data collected from four sites on the Kansas River and four of its tributaries during July 2012 through September 2016. The water-quality constituents included in this data release are the cyanotoxins microcystin and cylindrospermopsin, the taste-and-odor compounds geosmin and 2-methylisoborneol, major ions, alkalinity, nutrients, suspended sediment, indicator bacteria, and actinomycetes bacteria. Categories: Data; Types: Citation; Tags: 2-methylisoborneol, Actinomycetes bacteria, Alkalinity, Big Blue River nr Manhattan, KS, Chlorophyll, All tags... Cyanobacteria, Cyanotoxins, Cylindrospermopsin, Delaware River at Perry, KS, Discrete data collection, Dissolved Oxygen, Freshwater, Geosmin, Indicator bacteria, Kansas, Kansas River, Kansas River at De Soto, KS, Kansas River at Lawrence, KS, Kansas River at Wamego, KS, Kansas River nr Lake Quivira, KS, Lower Kansas River Basin, MIB, Major ions, Microcystin, Nutrients, Phycocyanin, Republican River at Junction City, KS, River, Specific conductance, Suspended sediment, Taste-and-odor compounds, Turbidity, USGS Science Data Catalog (SDC), USGS station number 06857100, USGS station number 06887000, USGS station number 06887500, USGS station number 06890900, USGS station number 06891080, USGS station number 06891500, USGS station number 06892350, USGS station number 06892518, United States, Wakarusa River nr Lawrence, KS, Water temperature, Water-quality sample, pH, Fewer tags 1 2 3 »