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Filters Date Range Past year (3) Past month (0) Past week (0) Past day (0) Custom range... To   Search Types Map Service (3) OGC WFS Layer (3) OGC WMS Layer (3) OGC WMS Service (3) Citation (2) Contacts U.S. Geological Survey - ScienceBase U.S. Geological Survey Ecosystems Amanda W Demopoulos Upper Midwest Environmental Sciences Center More... Categories Data Release - Revised (1) Tag Types Theme (22) Place (20) USGS Scientific Topic Keyword (14) Harvest Set (17) theme (1) Resource Type (1) Status (1) Tag Schemes None (17) USGS Thesaurus (11) Geographic Names Information System (4) ISO 19115 Topic Category (16) Geographic Names Information System (GNIS) (4) USGS Biocomplexity Thesaurus (1) Roseate tern (1) More... View Results as: JSON ATOM CSV

Stable isotope values for Dry Tortugas nesting loggerheads sampled 2013-2018 We used a combination of stable isotope analysis of carbon and nitrogen values in nesting loggerhead sea turtle samples to describe the foraging area used by each turtle. Here we present the stable isotope values for United States Geological Survey (USGS) turtles sampled in the remote Dry Tortugas National Park, south Florida, and their assigned foraging area. Categories: Data; Tags: Aquatic Biology, Dry Tortugas National Park, Ecology, Loggerhead, Stable Isotopes, All tags... USGS Science Data Catalog (SDC), Wildlife Biology, biota, Fewer tags Mercury Contamination of Red-legged Kittiwakes in the Western Subarctic Pacific Ocean This dataset contains mercury concentrations and locations of wintering red-legged kittiwakes in the western subartic Pacific Ocean. These data support the following publication: Fleishman, AB, RA Orben, N Kokubun, A Will, R Paredes, JT Ackerman, A Takahashi, AS Kitaysky, and SA Shaffer. 2019. Wintering in the Western Subarctic Pacific increases mercury contamination of red-legged kittiwakes. Environmental Science and Technology, in press. Categories: Data; Tags: Pacific Ocean, USGS Science Data Catalog (SDC), Wildlife Biology, biogeography, biota, All tags... birds, contaminant exposure, distribution, hierarchical clustering, isotopic analysis, marine isoscape, mercury contamination, mesopelagic predator, migration (organisms), non-breading, seabird, seabird sentinels, stable isotopes, western subartic, Fewer tags Upper Mississippi River water and bigheaded carp otolith chemistry data Data set includes water Sr:Ca, Ba:Ca, and δ18O for the Upper Mississippi River and tributaries and otolith Sr:Ca, Ba:Ca, and δ18O data from bigheaded carp collected in pools 19-21 of the Upper Mississippi River. Abstract from manuscript: Knowledge of environments used during early life history and movement patterns of Bighead Carp (Hypophthalmichthys nobilis) and Silver Carp (H. molitrix), collectively termed bigheaded carps, in the Upper Mississippi River (UMR) would be valuable for informing control measures to limit further population expansion and impacts of these species. Lock and Dam 19 (LD19) is a high-head dam on the UMR that delineates downriver areas where bigheaded carps are well-established from upriver... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Asian Carp, Hypophthalmichthys, Pools 19-21 of the Upper Mississippi River, USGS Science Data Catalog (SDC), biota, All tags... microchemistry, otoliths, stable isotopes, Fewer tags Chemical and isotopic data on gases and waters for thermal and non-thermal features across Yellowstone National Park, v. 2.0 Degassing thermal features at Yellowstone National Park include spectacular geysers, roiling hot springs, bubbling mud pots, fumaroles, frying pans, and areas of passive degassing characterized by steaming ground. Most of these features are readily identified by visible clouds of steam that are occasionally accompanied by a strong “rotten egg” odor from emissions of hydrogen sulfide gas. Gas compositions typically are greater than 90% carbon dioxide with lesser amounts of helium, hydrogen, hydrogen sulfide, methane, nitrogen and other trace components. The composition of the gas and relative amounts of gas and steam relate both to the type of feature as well as the geographic location within the park. In 2003 we... Categories: Data, Data Release - Revised; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: USGS Science Data Catalog (SDC), Yellowstone National Park, Yellowstone National Park, gas chemistry, stable isotopes, All tags... volcano, Fewer tags Food-web dynamics and isotopic niches in deep-sea communities residing in a submarine canyon and on the adjacent open slopes Examination of food webs and trophic niches provide insight into organisms’ functional ecology, yet few studies have examined the trophodynamics within submarine canyons, where the interaction of morphology and oceanography influences food deposition. Stable isotope analysis and Bayesian ellipses documented deep-sea food web structure and trophic niches in Baltimore Canyon and the adjacent open slopes in the U.S. Mid-Atlantic Region. Results revealed isotopically diverse feeding groups, comprising approximately 5 trophic levels. Regression analysis indicated that consumer isotope data are structured by site (canyon vs. slope), feeding group, and depth. Benthic feeders were enriched in 13C and 15N relative to suspension... Categories: Data; Types: Citation; Tags: Atlantic Ocean, Baltimore Canyon, Bayesian ellipses, USGS Science Data Catalog (SDC), deep-sea, All tags... stable isotopes, submarine canyon, Fewer tags Data release for Seasonality of precipitation in the southwestern United States during the late Pleistocene inferred from stable isotopes in herbivore tooth enamel The late Pleistocene was a climatically dynamic period, with abrupt shifts between cool-wet and warm-dry conditions. Increased effective precipitation supported large pluvial lakes and long-lived spring ecosystems in valleys and basins throughout the western and southwestern U.S., but the source and seasonality of the precipitation are debated. Here we present stable carbon and oxygen isotope data from tooth enamel of late Pleistocene herbivores recovered from paleowetland deposits at Tule Spring Fossil Beds National Monument in the Las Vegas Valley of southern Nevada, as well as modern herbivores from the surrounding area, to investigate whether winter or summer precipitation was responsible for driving the wet... Categories: Data; Tags: Las Vegas, Nevada, Mojave Desert, Tule Springs Fossil Beds National Monument, USGS Science Data Catalog (SDC), late Pleistocene, All tags... none, paleoclimate, paleowetlands, southwestern U.S., stable isotopes, tooth enamel, Fewer tags Trophic structure of mesopelagic fishes in the Gulf of Mexico revealed by gut content and stable isotope analyses Mesopelagic fishes represent an important component of the marine food web due to their global distributions, high abundances and ability to transport organic material throughout a large part of the water column. This study combined stable isotope (SIA) and gut content analyses (GCA) to characterize the trophic structure of mesopelagic fishes in the north central Gulf of Mexico. Additionally this study examined whether mesopelagic fishes utilized chemosynthetic energy from cold seeps. Specimens were collected (9-25 August 2007) over three deep (>1000 m) cold seeps at discrete depths (surface to 1503 m) over the diurnal cycle. Gut content analyses classified 31 species (5 families) of mesopelagic fishes into 5 feeding... Categories: Data; Types: Citation; Tags: Gulf of Mexico, Gulf of Mexico, MixSIAR, USGS Science Data Catalog (SDC), chemosynthetic, All tags... gut contents, mesopelagic fishes, stable isotopes, Fewer tags Otolith microchemistry of adult bigheaded carp for determining early-life environments in the Upper Mississippi River 2016-2018 Data set includes water Sr:Ca, Ba:Ca, and δ18O for the Mississippi River and tributaries, and otolith Sr:Ca, Ba:Ca, and δ18O data from bigheaded carp (Silver Carp and BIghead Carp) collected in navigation pools 16-19 of the Upper Mississippi River in 2016 to 2018. Bigheaded carp (Bighead Carp and Silver Carp) are invasive species in the US and have spread throughout most of the lower Mississippi River Basin. Population abundance upstream of Lock and Dam 19 (LD19) on the Upper Mississippi River (UMR) has likely been limited by the high-head dam at this location, which restricts all upstream fish passage to the lock chamber. To determine early-life environments of adult bigheaded carp captured upstream LD19 at the... Categories: Data; Tags: Aquatic Biology, Asian carp, Hypophthalmichthys, Invasive carp, Invasive fishes, All tags... Navigation pools 16-19, USGS Science Data Catalog (SDC), Upper Mississippi River, biota, fish passage, microchemistry, otolith, recruitment, stable isotopes, Fewer tags Pre-breeding foraging ecology of three tern species nesting in the Gulf of Maine This dataset contains carbon (δ13C) and nitrogen (δ15N) isotope values, and C:N ratios, from eggshell tissue samples of Arctic terns (Sterna paradisaea), Common terns (S. hirundo), and Roseate terns (S. dougalii) nesting on seven islands located along the coast of Maine in 2016, 2017, and 2018. Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Gulf of Maine, Sterna sp., Terns, eggshells, foraging ecology, All tags... stable isotopes, trophic niche breadth, Fewer tags Comparison of methane concentration and stable carbon isotope data for natural samples analyzed by discrete sample introduction module - cavity ring down spectroscopy (DSIM-CRDS) and traditional methods A discrete sample introduction module (DSIM) was developed and interfaced to a cavity ring-down spectrometer to enable measurements of methane and CO2 concentrations and 13C values with a commercially available cavity ring-down spectrometer (CRDS). The DSIM-CRDS system permits the analysis of limited volume (5 - 100-ml) samples ranging six orders-of-magnitude from 100% analyte to the lower limit of instrument detection (2 ppm). We demonstrate system performance for methane by comparing concentrations and 13C results obtained by the DSIM and traditional methods for a variety of sample types, including low concentration (nanomolar) seawater and high concentration (> 90%) natural gas. The expansive concentration range... Categories: Data; Tags: Geochemistry, Temperate Northern Atlantic, Temperate Northern Pacific, U.S. Geological Survey, USGS, All tags... biogeochemistry, carbon cycle, carbon cycling, carbon dioxide, carbon isotope analysis, cavity ring-down spectroscopy, eastern continental margin of India, environment, gas hydrate resources, geochemical data, geochemistry, geochemistry, isotope geochemistry, marine chemistry, methane, methane hydrate, northern Cascadia margin, northern US Atlantic margin, ocean characteristics, oceanography, oceans, sediment geochemistry, stable isotopes, Fewer tags Host feeding ecology and trophic position significantly influence isotopic discrimination between a generalist ectoparasite and its hosts: implications for parasite-host trophic studies Despite being one of the most prevalent forms of consumerism in ecological communities, parasitism has largely been excluded from food-web models. Stable isotope analysis of consumers and their diets has been widely used in the study of food-webs for decades. However, the amount of information regarding parasite stable isotope ecology is limited, restricting the ability of ecologists to use stable isotope analysis to study parasites in food-webs. This study took advantage of distinct differences in the feeding ecology and trophic position of different species of fish known to host the same common micropredatory gnathiid isopod, to study the effects of host stable isotope ecology on that of the associated micropredator.... Categories: Data; Tags: Eastern Caribbean, Ecology, Shallow/Mesophotic Coral Reef Biota, St John, United States Virgin Islands, Stable Isotopes, All tags... USGS Science Data Catalog (SDC), Virgin Islands of the United States, biota, coral reefs, food web, parasites, stable isotope analysis, symbiosis, Fewer tags The Stable Carbon Isotope Dataset of Individual Foraminifer (Orbulina universa) Shells Measured by Secondary Ion Mass Spectrometry and Gas-Source Mass Spectrometry This data release contains data associated with the journal article, “Comparison of δ13C Analyses on Individual Foraminifer (Orbulina universa) Shells by Secondary Ion Mass Spectrometry and Gas-Source Mass Spectrometry”. Data tables are comprised of stable carbon isotope (δ13C) measurements of planktic foraminifer (Orbulina universa) shells measured by secondary ion mass spectrometry (SIMS) and conventional gas-source mass spectrometry (GSMS). The data release also includes the R code used for statistical analysis and figure generation, as well as scanning electron microscope (SEM) images of O. universa shells taken before and after SIMS analysis. Categories: Data; Tags: Blake Ridge, Catalina Island, Energy Resources, Planktic foraminifera, USGS Science Data Catalog (SDC), All tags... geochemistry, geoscientificInformation, in situ analysis, secondary ion mass spectrometry, stable isotopes, Fewer tags Geochemical Composition of Urban Stormwater Runoff Within the Conterminous United States from Samples Collected in 2016-2017 These analyses provide the basic geochemical composition of urban stormwater runoff from rainwater/stormwater that does or has the potential to infiltrate groundwater from Green Infrastructure control measures. These measures are able to mimic the natural landscape with engineered designed systems to enhance stormwater infiltration to groundwater. Categories: Data; Tags: Geochemistry, USGS Science Data Catalog (SDC), Water Quality, alkalinity, anions, All tags... biota, cations, geochemistry, groundwater and surface-water interaction, runoff, stable isotopes, stormwater runoff chemistry, trace elements, Fewer tags Changes in Organic Carbon Source and Storage with Sea Level Rise-Induced Transgression in a Chesapeake Bay Marsh This data set includes a variety of bulk organic carbon, lignin-phenol biomarker, and sedimentation rate data from a set of sites in the Blackwater Marsh in Chesapeake Bay. At each site, a short core was taken, and all data is organized according to depth below the marsh surface. Data includes: Bulk %OC, bulk %N, atomic carbon:nitrogen ratios, stable carbon isotopes (d13C) Lignin-phenol biomarker parameters, including 8, Ad:Alv, C:V, S:V, and the individual concentrations of each lignin-phenol (in lambda units, or mg per 100 mg OC). Pb-210 and Cs-137 activities Sediment bulk densities In addition to the sediment core data, we are also including d13C values from vegetation samples collected from each of the marsh... Categories: Data; Tags: 13C, Blackwater National Wildlife Refuge, Chesapeake Bay, Ecology, Sedimentation rates, All tags... USGS Science Data Catalog (SDC), blue carbon, lignin-phenol biomarkers, organic carbon, stable isotopes, Fewer tags U.S. Fish and Wildlife Service Final Report: Stable Hydrogen-Isotope Analysis of Peregrine Falcons in the United States We addressed a United States Fish and Wildlife Service (USFWS) commitment to undertake hydrogen isotopic analyses of feathers (“Stable hydrogen isotope ratios from feathers”) collected from falconer-harvested passage peregrine falcons (Falco peregrinus) by: (1) developing a map using feathers collected from falcons of known origin, (2) linking falconer-harvested passage peregrines to natal origin, and (3) estimating the degree to which the predicted make-up of the harvest in the USFWS Final Environmental Assessment (EA) was correct (i.e., greater than 64 percent of peregrines originated from high latitudes). The USFWS coordinated the collection of 125 feathers in the United States from known-origin nestlings and... Categories: Data; Tags: Document, Falco peregrinus, North America, United States, completed, All tags... falconry, hydrogen, natal origin, peregrine falcon, stable isotopes, Fewer tags Pacific Northwest Avian Scavenger Lead and Mercury Dataset, 2012-2016 The dataset includes the bird species, region where sampled, sampling site, capture location, mercury concentration in whole blood, lead concentration in whole blood, sulfur stable isotope concentration in blood plasma, carbon isotope concentration in blood plasma, whole blood ALAD activity, and fecal corticosterone concentrations. Categories: Data; Tags: Ecology, Environmental Health, Oregon, Pacific Northwest, USGS Science Data Catalog (SDC), All tags... Washington, Wildlife Biology, biota, common raven, corticosterone, ecotoxicology, environmental exposure, hypothalamic−pituitary−adrenal axis, stable isotopes, stress, turkey vulture, Fewer tags Stable Isotopes in Biota in Lake Mead National Recreation Area near Las Vegas, Nevada This dataset presents the results of analysis of aquatic biota tissue samples, collected over multiple sampling events from in from 2007 to 2014 at three sites (Las Vegas Bay, Overton Arm, and Boulder Basin) in Lake Mead National Recreational Area. The tissue samples were analyzed for concentrations of Carbon 13 and Nitrogen 15 isotopes by the University of California, Davis in Davis, California. Data are presented in 1 spreadsheet worksheet that is organized by year, location, and taxa. General trophic level (Vander Zanden and Rasmussen, 1999) and calculations of benthic reliance (Umek and others, 2010) also are included. Combined data from sampling events in 2007 and 2008 previously were published in Umek and... Categories: Data; Tags: Boulder Basin, Colorado River, Lake Mead, Lake Mead National Recreational Area, Las Vegas, All tags... Las Vegas Bay, Overton Arm, aquatic biology, aquatic ecosystems, benthic ecosystems, benthic reliance, biota, carbon 13, carbon isotope analysis, dissolved organic compounds, endocrine disrupting compounds, endocrinology, environment, field sampling, fish, food web, fragrances, gas chromatography, inlandWaters, invasive species, invertebrates, isotopes, isotopic analysis, light stable isotope analysis, mass spectroscopy, mollusks, nitrogen 15, organochlorines, periphyton, pesticides, plankton, polybrominated biphenyl ethers (PBDEs), polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), stable isotopes, surface water quality, synthetic organic compounds, trophic levels, waste indicators, wastewater discharge, yeast estrogen screen, Fewer tags Regional patterns in foraging ecology between adult roseate and common terns in the Northwest Atlantic Co-occurring species with similar resource requirements often partition ecological niches. In the Northwest Atlantic (NWA), endangered roseate terns (Sterna dougallii) nest almost exclusively in coastal island colonies alongside common terns (S. hirundo). Roseate terns are prey specialists compared to common terns, which are opportunistic generalists; however, the two species forage on similar resources during the breeding season. The degree to which these species overlap in their adult foraging ecologies is not well understood. We compared the isotopic niches of nesting adult roseate and common terns by analyzing stable carbon (δ13C) and nitrogen (δ15N) isotopes in eggshell membrane tissues collected in 2018 and... Categories: Data; Tags: Gulf of Maine, Long Island Sound, Northwest Atlantic, Southern New England, Sterna sp., All tags... Terns, USGS Science Data Catalog (SDC), Wildlife Biology, biota, eggshells, foraging ecology, stable isotopes, trophic niche, Fewer tags Synthetic Organic Compounds in Water in Lake Mead National Recreation Area near Las Vegas, Nevada This dataset presents the results of passive water sampling conducted at 2 sites in 2013 and 3 sites in 2014 in Lake Mead National Recreational Area. Polar Organic Chemical Integrative Samplers (POCIS) and Semipermeable Membrane Devices (SPMDs) were deployed in Las Vegas Bay and Overton Arm in 2013 and Las Vegas Bay, Boulder Basin, and Overton Arm in 2014. The samplers were analyzed for concentrations of polychlorinated biphenyls (PCBs), organochlorines (DDT-type compounds and their degradates), polybrominated biphenyl ethers (PBDEs), polycyclic aromatic hydrocarbons (PAHs), waste indicators (WW), and yeast estrogen screen (YES) by the U.S. Geological Survey (USGS) at the Columbia Environmental Research Center (CERC)... Categories: Data; Tags: Boulder Basin, Colorado River, Lake Mead, Lake Mead National Recreational Area, Las Vegas, All tags... Las Vegas Bay, Overton Arm, aquatic biology, aquatic ecosystems, benthic ecosystems, benthic reliance, biota, carbon 13, carbon isotope analysis, dissolved organic compounds, endocrine disrupting compounds, endocrinology, environment, field sampling, fish, food web, fragrances, gas chromatography, inlandWaters, invasive species, invertebrates, isotopes, isotopic analysis, light stable isotope analysis, mass spectroscopy, mollusks, nitrogen 15, organochlorines, periphyton, pesticides, plankton, polybrominated biphenyl ethers (PBDEs), polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), stable isotopes, surface water quality, synthetic organic compounds, trophic levels, waste indicators, wastewater discharge, yeast estrogen screen, Fewer tags Morphometric, Age, Visible Abnormalities, Skin and Liver Neoplasms, and Stable Isotopes in White Sucker Collected in the St. Louis River and Estuary, Minnesota/Wisconsin, 2011-2015 The dataset provides length, weight, age, observations of visible external abnormalities, liver and skin histopathology and stable isotopes of white sucker captured within the St. Louis river and associated bays. Categories: Data; Tags: Environmental Health, St. Louis Bay, St. Louis River, Superior Bay, USGS Science Data Catalog (SDC), All tags... biota, liver tumors, skin tumors, stable isotopes, Fewer tags 1 2 »