AndreaBozzo/ceres-open-data-index huggingface dataset:
West Twin Creek Alaska Subsurface Bromide Tracer Experiment, 2015

This data was produced as part of a subsurface tracer experiment performed on a boreal hillslope in July, 2015. The data is separated into three files: 'subsurfaceFlow_bromideTracer_well_wTwinCr_koch.csv' includes the location and depth of well screens, concentrations of the bromide tracer in time, saturation state of the subsurface at the wells, ground cover at the wells, and depth of the organic-mineral boundary which controls shallow flow. 'subsurfaceFlow_bromideTracer_probe_wTwinCr_koch.csv' includes thaw depth, gravel presence, and vegetation type within the well field. 'subsurfaceFlow_bromideTracer_breakthroughs_wTwinCr_koch.csv' includes solute concentrations in time from wells that displayed robust breakthroughs. The data includes electrical conductivity and bromide measurements, and a column that combines these two solutes based on a significant linear relationship between the two. 

Tags: alaska, geoscientificinformation, groundwater-flow, infiltration, nome-creek, percolation, permeability, runoff, soil-horizons, subsurface-flow, tracer-study, usgs-asc92, water-sampling, white-mountains
Organization: Department of the Interior
Assessment of Contemporary Genetic Diversity and Inter-Taxa/Inter-Region Exchange of Avian Paramyxovirus Serotype 1 in Wild Birds Sampled in North America, 1986-2014

Data set pertaining to avian paramyxovirus (APMV-1) sequences used in phylogenetic analyses. Data contains GenBank Accession numbers, host species common name and taxonomic order, collection year, and collection location.

Tags: animals-vertebrates, aquatic-birds, biological-science-disciplines, biology, biota, birds, canada, disease, duck, environment, genetic-diversity, genetics, goose, gull, natural-science-disciplines, phylogeny, seabird, shorebird, swan, united-states, usgs-asc91, waterfowl
Organization: Department of the Interior
Bering Land Bridge Lake Classification, Seward Peninsula, Alaska, 2012-2016

This study focuses on a 67 attribute lake cover classification scheme covering the Bering Land Bridge area of the Seward Peninsula, Alaska. The GIS dataset consists of 5170 lakes (which were extracted from a 5m resolution ifSAR/orthophoto image) and provides information on lake morphometry, hydrologic connectivity, surface area dynamics, surrounding terrestrial ecotypes, bedfast percentage, and other important conditions. The Seward Peninsula lake habitat study classification system provides lake specific information for a coastal peninsula area that will guide research and aid in the management of the natural environment.

Tags: alaska, aquatic-ecosystems, bering-land-bridge-national-preserve, environment, fluvial-landforms, fluvial-morphology, geomorphic, hydrology, imagerybasemapsearthcover, inlandwaters, lake-dynamics, lakes, land-surface, land-use-land-cover, landforms-processes, landscape, seward-peninsula, snow-and-ice-cover, stream, surface-water-non-marine, usgs-asc90, vegetation-cover, watershed-drainage-basin
Organization: Department of the Interior
Gulf Watch Alaska Nearshore Component: Monitoring Site Locations from Prince William Sound, Katmai National Park and Preserve, and Kenai Fjords National Park

These data are part of the Gulf Watch Alaska (GWA) long term monitoring program, nearshore monitoring component. Specifically, these data describe site locations for rocky intertidal, mussel sampling, soft sediment bivalve sampling, and eelgrass bed sampling in the northern Gulf of Alaska within the GWA program. The dataset consists of two comma separated files exported from a Microsoft Excel workbook. The data consists of 1. rocky intertidal, mussel sampling, and soft sediment site location information, and 2. eelgrass bed locations. Sampling will be conducted in Katmai National Park and Preserve (KATM), Kenai Fjords National Park (KEFJ), Prince William Sound (PWS) and to a lesser extent on the Lake Clark National Park and Preserve (LACL). Sites from a related project that provides similar data from Kachemak Bay (KBAY) are included here.

Tags: alaska, alaska-peninsula, algae, benthic, biota, community-ecology, ecology, ecosystem-monitoring, eelgrass, environment, gulf-of-alaska, intertidal, invertebrates, kachemak-bay, katmai-national-park-and-preserve, kenai-fjords-national-park, lake-clark-national-park, mussels, nearshore-ecology, prince-william-sound, usgs-asc89
Organization: Department of the Interior
Walrus Used and Available Resource Units for Northeast Chukchi Sea, 2008-2012

Sea ice loss represents a stressor to the Pacific walrus (Odobenus rosmarus divergens), which feeds on benthic macroinvertebrates in the Bering and Chukchi seas. However, no studies have examined the effects of sea ice on foraging walrus space use patterns. Thus, we examined walrus foraging resource selection as a function of proximity to resting substrates and prey biomass with a matched use-availability design. We quantified biomass of 17 benthic taxa, which included amphipods, bivalves, polychaete, sand dollars, tunicates, and sipunculids. We included covariates for distance to sea ice and distance to land, and systematically developed a series of candidate models to examine interactions among benthic prey biomass and resting substrates. We ranked candidate models with Bayesian Information Criterion and made inferences on walrus resource selection based on the top-ranked model. Biomass of the bivalve family Tellinidae, distance to ice, distance to land, and the interaction of distances to ice and land were in the top-ranked model. Standardized model coefficients indicated that distance to ice explained the most variation in walrus foraging resource selection patterns followed by Tellinidae biomass. Distance to land and the interaction of distances to ice and land accounted for similar levels of variation in foraging walrus resource selection. These data represent the used and available resource units with the covariates of distance to land and distance to ice.

Tags: alaska, animal-behavior, animals-vertebrates, biota, chukchi-sea, discrete-choice, environment, mammals, marine-ecosystems, marine-mammals, odobenus-rosmarus-divergens, pacific-walrus, resource-selection, species-life-history, telemetry, use-availability, usgs-asc65, wildlife
Organization: Department of the Interior
qfasar: Quantitative Fatty Acid Signature Analysis in R

An implementation of Quantitative Fatty Acid Signature Analysis (QFASA) in R.  QFASA is a method of estimating the diet composition of predators.  The fundamental unit of information in QFASA is a fatty acid signature (signature), which is a vector of proportions describing the fatty acid composition of adipose tissue.  Signature data from at least one predator and from samples of all potential prey types are required.  Calibration coefficients, which adjust for the differential metabolism of individual fatty acids by predators, are also required.  Given those data inputs, a predator signature is modeled as a mixture of potential prey signatures and its diet estimate is obtained as the mixture that minimizes a measure of distance between the observed and modeled signatures.  A variety of estimation options, goodness-of-fit diagnostic procedures to assess the suitability of estimates, and simulation capabilities are implemented.  Please refer to the package vignette and the documentation files for individual functions for details and references.

Tags: aitchison-distance-measure, biota, bootstrap-sampling, chi-square-distance-measure, clustering, diet-composition, diet-estimation, distance-measure, goodness-of-fit, kullback-leibler-distance-measure, linear-mixing-model, numerical-optimization, predator-prey, qfasa, quantitative-fatty-acid-signature-analysis, r_, rsolnp, simulation, usgs-asc64
Organization: Department of the Interior
Fish Creek Watershed Lake Classification, NPRA, Alaska, 2016

This study focuses on the development of a 20 attribute lake cover classification scheme for the Fish Creek Watershed (FCW), which is located in the National Petroleum Reserve-Alaska (NPR-A). The GIS dataset consists of 4,362 lakes (which were extracted from a 5m resolution IfSAR/orthophoto image) covering 18% of the 4,900 km2 FCW and provides information on lake morphometry, hydrologic connectivity, surface area dynamics, surrounding terrestrial ecotypes, and other important aquatic conditions. The FCW lake cover classification scheme provides lake specific information for an arctic watershed that will guide research and aid in the management of the natural and human-modified environment.

Tags: alaska, aquatic-ecosystems, environment, fluvial-landforms, fluvial-morphology, geomorphic, hydrology, imagerybasemapsearthcover, inlandwaters, lake-dynamics, lakes, land-surface, land-use-land-cover, landforms-processes, landscape, national-petroleum-reserve-alaska, npr-a, npra, stream, surface-water-non-marine, usgs-asc61, vegetation-cover, watershed-drainage-basin
Organization: Department of the Interior
Arctic Cisco Stomach Content Data, Prudhoe Bay, August 2009

This data set documents the stomach contents of age-0 Arctic cisco (Coregonus autumnalis) captured in Prudhoe Bay, Alaska in August 2009

Tags: alaska, anadromous-species, animals-vertebrates, arctic-cisco, beaufort-sea, biota, coastal-ecosystems, coastal-zone, coregonus-autumnalis, diets, environment, estuarine-habitat, fish, fisheries, marine-ecosystems, migratory-species, prudhoe-bay, salmon-trouts, usgs-asc60
Organization: Department of the Interior
Arctic Cisco Stable Isotope Data, Prudhoe Bay, August 2009

This data set documents the carbon and nitrogen stable isotope ratios of age-0 Arctic cisco (Coregonus autumnalis) captured in Prudhoe Bay, Alaska in August 2009.

Tags: alaska, anadromous-species, animals-vertebrates, beaufort-sea, biota, carbon-isotopes, coastal-ecosystems, coastal-zone, environment, estuarine-habitat, fish, fisheries, isotopic-analysis, marine-ecosystems, migratory-species, nitrogen-isotopes, prudhoe-bay, salmon-trouts, stable-isotopes, usgs-asc59
Organization: Department of the Interior
Walrus Bayesian State-space Model Output from the Bering Sea and Chukchi Sea, 2008-2012

State-space models offer researchers an objective approach to modeling complex animal location datasets, and state-space model behavior classifications are often assumed to have a link to animal behavior.  We evaluated the behavioral classification accuracy of a Bayesian state-space model in Pacific walruses using Argos satellite tags outfitted with sensors to detect animal behavior in real time.  Specifically, tags were targeted to attach midway between the shoulders and each tag had a conductivity sensor and pressure transducer sensor integrated with an Argos satellite telemetry tag.  At 1 s intervals, the pressure transducer recorded the depth of the tag and the conductivity sensor indicated whether the tag was in salt water.  Two simple algorithms that ran onboard the tag summarized behavior information within 1-hr intervals to facilitate behavior data transmission through the Argos system using two indicator variables.  One algorithm set the forage indicator variable to 1 if &gt;50% of depth measurements exceeded 10 m during a 1-hr interval and to 0 if otherwise.  A second algorithm set the wet indicator variable to 1 if &gt;10% of conductivity measurements indicated the tag was in salt water during that 1-hr interval and to 0 if otherwise.  Based on the values of these two indicator variables, we categorized each 1-hr interval into one of three behavior states.  A combination of wet = 0 and forage = 0 for a 1-hr interval indicated the animal was primarily hauled-out during that period.  Variable indicators of wet = 1 and forage = 0 indicated a walrus was primarily in water and not foraging (swimming) during the associated 1-hr interval.  Finally, combinations of wet = 1 and foraging = 1 represented an individual foraging at depth for the corresponding 1-hr interval.  To compare these real behaviors to modeled behaviors, we fit a two-state discrete-time continuous-space Bayesian state-space model to data from 306 Pacific walruses tagged in the Chukchi Sea.  We matched predicted locations and behaviors from the state-space model (resident, transient behavior) to true animal behavior (foraging, swimming, hauled-out) and evaluated classification accuracy with kappa statistics and root mean square error.  These data represent Bayesian state-space model output for 8 hr and 12 hr time steps.

Tags: alaska, animal-movement, animal-tracking, animals-vertebrates, aquatic-ecosystems, behavior, bering-sea, biologging, biota, carnivores, chukchi-sea, coastal-ecosystems, environment, kernel-overlap, mammals, marine-ecosystems, radio-telemetry, seals-sea-lions-walruses, space-use, state-space-model, telemetry, usgs-asc58, utilization-distributions, wildlife
Organization: Department of the Interior
Larus Gull Microsatellite DNA Data, 2006-2009

This data set describes nuclear microsatellite genotypes derived from eleven autosomal loci (Lar24, Lar12, Lar26, Lar19, Rbg13, K16, Rbg18, Hg18, Hg16, Hg25, Rbg29). A total of 651 Larus gulls were examined for this study with samples collected throughout North America, Europe, Russia, and South America. 

Tags: alaska, alleles, animals-vertebrates, biodiversity, biota, birds, coastal-ecosystems, dna, dna-sequencing, environment, europe, evolution, gene-flow, genetic-diversity, genetic-markers, genetic-variance, genetics, genotype, microsatellite-repeats, polymerase-chain-reaction, population-genetics, russia, south-america, systematics-and-taxonomy, usgs-asc51, waders-gulls-auks-and-allies, wildlife
Organization: Department of the Interior
Stable Isotope Data from Diets and Tissues of Captive Bears Fed Experimental Diets

This dataset contains stable isotope incorporation and discrimination results for several sets of feeding experiments with captive brown and polar bears. Experiments were designed to determine the effects of dietary lipid content and fasting behavior on discrimination in blood, hair, and fat. Data are divided into three components of the study: one to estimate isotopic discrimination with varying dietary lipid content, one to estimate the potential effects of fasting on tissue isotope values, and one to determine incorporation rates of isotopes in various tissues. The experiments were conducted between 2009 and 2013 with captive grizzly bears at Washington State University and captive polar bears at the Oregon and Alaska zoos.

Tags: animal-behavior, animals-vertebrates, bears, bioenergetics, biota, brown-bear, carbon-isotopes, carbon-isotopes-carbon-13, carbon-isotopes-isotopes, carnivores, diet-composition, diet-estimation, diets-animal-nutrition, diets-nutrition, environment, grizzly-bear, mammals, metabolism, nitrogen-isotopes, polar-bear, predator-prey, species-life-history, stable-isotopes, ursus-arctos, ursus-maritimus, usgs-asc50, wildlife
Organization: Department of the Interior
Eelgrass (Zostera marina) Microsatellite DNA Data, Pacific Coast of North America, 2000-2009

This data set contains genetic information collected from eelgrass (Zostera marina) populations along the Pacific coast of North America from Alaska to Baha California. A total of 447 samples were collected comprising 401 unique individuals (genets) and 46 clones (ramets) from which 10 microsatellite DNA loci were obtained.

Tags: alaska, alleles, angiosperms-flowering-plants, aquatic-ecosystems, baja-california, biota, coastal-habitat, dna, eelgrass, environment, gene-flow, genetic-diversity, genetic-markers, genetic-structure, genetic-variance, genotype, mexico, microsatellite-repeats, monocots, plants, polymerase-chain-reaction, population-genetics, sea-grass, seagrass, usgs-asc49, zostera-marina
Organization: Department of the Interior
Spectacled Eider (Somateria fischeri) Nest Records Yukon-Kuskokwim Delta, Alaska

This dataset contains nest visit records of Spectacled Eiders (Somateria fischeri) near the Kashunuk River and on Kigigak Island on the Yukon-Kuskokwim Delta, Alaska since 1991.

Tags: alaska, animals-vertebrates, biota, birds, coastal-ecosystems, ducks-geese-swans, ecological-dynamics, environment, environmental-conditions, freshwater-ecosystems, kashunuk-river, kigigak-island, metapopulations, nesting-success, population-dynamics, somateria-fischeri, species-life-history, species-population-interactions, spectacled-eider, usgs-asc48, wetland-ecosystems, yukon-delta, yukon-delta-national-wildlife-refuge
Organization: Department of the Interior
Spectacled Eider (Somateria fischeri) Capture, Banding, and Mark-Resight Records; Kigigak Island, Yukon-Kuskokwim Delta, Alaska, 1992-2004

Data set containing body morphometric measurement and location data for captured Spectacled Eiders, and resight data for marked Spectacled Eiders on Kigigak Island, within the Yukon-Kuskokwim Delta, Alaska. 

Tags: alaska, animals-vertebrates, band, biological-classification, biosphere, biota, birds, ducks-geese-swans, ecological-dynamics, environmental-conditions, kigigak-island, lead, mark-recapture, metapopulations, population-dynamics, resight, species-life-history, species-population-interactions, spectacled-eider, usgs-asc47, yukon-delta, yukon-delta-national-wildlife-refuge
Organization: Department of the Interior
Spectacled Eider (Somateria fischeri) Nest, Capture, and Resight Records, Yukon-Kuskokwim Delta, Alaska

This dataset contains nest visit records and capture, measurement, and resight data from Spectacled Eiders (Somateria fischeri) near the Kashunuk River and on Kigigak Island on the Yukon-Kuskokwim Delta, Alaska since 1991.

Tags: alaska, animals-vertebrates, biota, birds, coastal-ecosystems, ducks-geese-swans, ecological-dynamics, environment, environmental-conditions, freshwater-ecosystems, kashunuk-river, kigigak-island, mark-resight, metapopulations, nest-success, population-dynamics, somateria-fischeri, species-life-history, species-population-interactions, spectacled-eider, usgs-asc46, wetland-ecosystems, yukon-delta, yukon-delta-national-wildlife-refuge
Organization: Department of the Interior
Spectacled Eider (Somateria fischeri) Banding Records; Kashunuk River, Alaska, 1992-2002

Data set containing body morphometric measurement and location data associated with marked Spectacled Eiders, captured near the Kashunuk River, within the Yukon-Kuskokwim Delta, Alaska.

Tags: alaska, animals-vertebrates, biological-classification, biosphere, biota, birds, ducks-geese-swans, ecological-dynamics, environmental-conditions, kashunuk-river, lead, metapopulations, population-dynamics, somateria-fischeri, species-life-history, species-population-interactions, spectacled-eider, usgs-asc45, yukon-delta, yukon-delta-national-wildlife-refuge
Organization: Department of the Interior
Long-tailed Duck (Clangula hyemalis) Microsatellite DNA Data, Alaska, Canada, Russia, 1994-2002

This data set describes nuclear microsatellite genotypes derived from twelve autosomal loci (6AB, Aph02, Aph08, Aph19, Aph23, Bca10, Bca11, Hhi5, Sfi11, Smo07, Smo09, and CRG), and two Z-linked microsatellite loci (Bca4 and Smo1). A total of 111 Long-tailed Ducks were examined for this genotyping with samples coming from the two primary breeding locales within Alaska (Arctic Coastal Plain of Alaska and the Yukon Delta, Western Alaska) and a representative locale in the central Canadian Arctic (Queen Maud Gulf Bird Sanctuary, Nunavut, Canada). The sex of most samples was determined in the field by plumage and later confirmed by using the CHD molecular sexing protocol (Griffiths et al., 1998).

Tags: alaska, alleles, animals-vertebrates, biota, birds, clangula-hyemalis, colville-river-delta, dna, ducks-geese-swans, environment, gene-flow, genetic-markers, genetics, genotype, indigirka-river, long-tailed-duck, microsatellite-repeats, nunavut, polymerase-chain-reaction, population-genetics, queen-maud-gulf, russia, terrestrial-ecosystems, usgs-asc44, wildlife, yukon-delta
Organization: Department of the Interior
Recreation Survey Results in Brown Bear Habitats, 2013

These data are the results of a modified Delphi survey in which expert opinion was solicited on the occurrence and frequency of recreational activities in brown bear habitats and their potential impacts. Twelve bear experts were surveyed and identified by either 1) their scientific publications on the impacts of one or more human recreational activity on bears, or 2) their experience in managing bear populations impacted by human recreational activities. Respondents were asked to estimate the frequency of each identified recreational activity for the bear populations they have experience with, estimate the proportion of each specific bear population exposed to each activity, and indicate the potential impacts of recreational activities in those bear populations. The frequency of occurrence of a recreational activity category and the proportion of the bear population exposed are reported from the final survey. We report the percentage of experts that noted potential for an impact on reduced survival, decreased nutritional intake, displacement, and reduced reproduction.

Tags: animals-vertebrates, bears, biota, brown-bear, brown-bears, carnivores, delphi-method, displacement, environment, europe, grizzly-bear, habitats, human-dimensions, human-impacts, mammals, north-america, population-and-community-ecology, recreation, recreational-activities-areas, social-behavior, ursus-arctos, usgs-asc43
Organization: Department of the Interior
Laysan Teal (Anas laysanensis) Microsatellite DNA Data, Laysan Island 1999-2009, Midway Atoll 2007-2010

The geographically closed, non-migratory populations of endangered Laysan Teal (Anas laysanensis) were sampled in the wild. This species was once widespread across the Hawaiian archipelago, but became isolated on Laysan Island (415 ha) from the mid-1800s until 2004 when a translocation to Midway Atoll (596 ha) was undertaken to reduce extinction risks. We compared genetic diversity and quantified variation at microsatellite loci sampled from 229 individuals from the wild populations at Laysan Island (1999–2009) and Midway Atoll (2007–2010; n = 133 Laysan, n = 96 Midway birds). We identified polymorphic markers by screening nuclear microsatellites (N = 83). Low nuclear variation was detected, consistent with the species' insular isolation and historical bottleneck. Six of 83 microsatellites were polymorphic.

Tags: alleles, anas-laysanensis, animal-species-reintroduction, animals-vertebrates, biota, birds, dna, dna-mitochondrial, dna-sequencing, ducks-geese-swans, environment, genetic-diversity, genetic-markers, genetics, island-endemic, laysan-duck, laysan-island, microsatellite-repeats, midway-atoll, polymerase-chain-reaction, polymorphism-genetic, population-dynamics, population-genetics, reintroduction-biology, usgs-asc33, waterfowl, wildlife
Organization: Department of the Interior
Assessing the Robustness of Quantitative Fatty Acid Signature Analysis to Assumption Violations (Supplementary Data)

This dataset contains fatty acid (FA) data expressed as mass percent of total FA for bearded seals, ringed seals and walrus. This is one of many datasets used in Bromaghin et al., In press, Assessing the robustness of quantitative fatty acid signature analysis to assumption violations, Methods in Ecology and Evolution. These supplemental data were used in computer simulations to compare the bias of several quantitative fatty acid signature analysis (QFASA) estimators and develop recommendations regarding estimator selection.

Tags: biota, diet-composition, diet-estimation, predator-prey, qfasa, usgs-asc31
Organization: Department of the Interior