Filters: Tags: Population Dynamics (X) > Categories: Data (X) > Types: Citation (X)

Filters Date Range Past year (1) Past month (0) Past week (0) Past day (0) Custom range... To   Search Extensions Citation (1) Types Map Service (5) OGC WFS Layer (5) OGC WMS Layer (5) OGC WMS Service (5) Contacts U.S. Geological Survey - ScienceBase Ecosystems U.S. Geological Survey M. Tim Tinker U.S. Geological Survey More... Categories Publication (1) Tag Types Theme (16) Place (16) Harvest Set (9) USGS Scientific Topic Keyword (3) Science Themes (3) theme (1) LCC End User Type (1) More... Tag Schemes none (3) USGS Thesaurus (11) None (5) Geographic Names Information System (3) Getty Thesaurus of Geographic Names (5) ISO 19115 Topic Category (7) USGS Geographic Names Information System (GNIS) (1) More... View Results as: JSON ATOM CSV

Movements of Sea Otters in the Santa Barbara Channel These data are .csv files of tagged sea otter re-sighting locations (henceforth, resights) collected in the field using a combination of VHF radio telemetry and direct observation using high powered (80x) telescopes. Sea otters were tracked by shore or boat-based observers from the date of tagging until the time of radio battery failure, the animal’s death, or the end of the project, whichever comes first. The frequency of re-sighting was opportunistic, depending on logistical factors such as coastal access, but generally ranged from daily to weekly. Location coordinates are reported latitude and longitude as well as X and Y coordinates in the projection/datum California Teale-Albers NAD 1927. The file contains... Categories: Data; Types: Citation; Tags: California, Santa Barbara Channel Islands, Santa Barbara County, Southern sea otter, movement patterns, All tags... population dynamics, sea otter demographics, Fewer tags Publication: Delaying conservation actions matters for species vulnerable to climate change Climate change vulnerability assessments are commonly used to identify species or populations at risk from global climate change, but few translate impact assessments to climate change adaptation actions. Furthermore, most climate change adaptation efforts emphasize where to implement management actions, whereas timing remains largely overlooked. The rate of modern climate change introduces urgency in evaluating whether delaying conservation actions compromises their efficacy for reaching important conservation targets. We evaluated the importance of multiple climate change adaptation strategies including timing of actions on preventing extinctions for a threatened climate-sensitive species, the Eastern Massasauga... Categories: Data, Publication; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Conservation NGOs, Conservation planning, Decision support, EARTH SCIENCE > LAND SURFACE > LANDSCAPE, Federal resource managers, All tags... LCC Network Science Catalog, Population and Habitat Evaluation/Projection, Publication, Publication, State agencies, Tribes, Vulnerability Assessment, climate adaptation, climate change, completed, environment, environment, population dynamics, threatened species, Fewer tags Historical Length, Weight, and Fecundity of Silver Chub (Macrhybopsis storeriana) in Western Lake Erie This data set provides a table of length, weight, sex, and estimated fecundity of Silver Chub Macrhybopsis storeriana in western Lake Erie from 1979 through 1987. These data are potentially useful to those studying recovery and restoration of Silver Chub in Lake Erie. These data were collected as part of routine trawl surveys in western Lake Erie. Other data associated with these data can be found in the Great Lakes Research Vessel Operations 1958-2018. (ver. 3.0, April 2019). A drawn map, originally packaged alongside the hard copy data sheets, is included in this data release. This map guides users in identifying specific locations of capture. Due to the legacy nature of these data, location data is estimated... Categories: Data; Types: Citation; Tags: Lake Erie, USGS Science Data Catalog (SDC), biota, endangered species, native species, All tags... population dynamics, Fewer tags Impact of Drought on Southwestern Pronghorn Population Trends and Predicted Trajectories in the Southwest in the Face of Climate Change Climate often drives ungulate population dynamics, and as climates change, some areas may become unsuitable for species persistence. Unraveling the relationships between climate and population dynamics, and projecting them across time, advances ecological understanding that informs and steers sustainable conservation for species. Using pronghorn (Antilocapra americana) as an ecological model, we used a Bayesian approach to analyze long-term population, precipitation, and temperature data from 18 populations in the southwestern United States. We determined which long-term (12 and 24 months) or short-term (gestation trimester and lactation period) climatic conditions best predicted annual rate of population growth... Categories: Data; Types: Citation; Tags: Antilocapra americana, Arizona, Climatology, Drought, Drought, Fire and Extreme Weather, All tags... Land Use Change, Mammals, National CASC, New Mexico, Texas, USGS Science Data Catalog (SDC), Utah, Wildlife Biology, Wildlife and Plants, climate change, density dependence, integrated Bayesian population models, large herbivores, population dynamics, rainfall effects, southwestern US, southwestern United States, southwestern United States, standardized precipitation index, ungulates, western Texas, Fewer tags Demographics of Sea Otters in the Santa Barbara Channel These data are .csv files of capture data from tagged sea otters in the Santa Barbara Channel Study. Sea otters were captured using highly specialized techniques employed by a team a rebreather divers and were processed by a shore team and veterinary crew at a mobile vet lab. Overall health assessments and morphometric data were collected, and the otters received colored flipper tags (for visual identification in the field) as well as VHF radio transmitter implants (for locating and "re-sighting" individuals) and time-depth recorder instruments (for archival logging of dive records and core body temperature for individual sea otters). Fields include an individual otter identification number, capture date, general... Categories: Data; Types: Citation; Tags: California, Santa Barbara Channel Islands, Santa Barbara County, Southern sea otter, movement patterns, All tags... population dynamics, sea otter demographics, Fewer tags Lake Erie Fish Community Data, 2013 - 2016 Lake Erie Biological Station (LEBS), located in Sandusky, Ohio, is a field station of the USGS Great Lakes Science Center (GLSC). LEBS is the primary federal agency for applied fisheries science excellence in Lake Erie. Since 2004, LEBS has participated in a collaborative, multiagency effort to assess forage fish populations in the western basin of Lake Erie. Assessing the distribution and abundance of both predator and prey (forage) fish species is a cornerstone of ecosystem-based based fishery management, and supports decision making that considers food-web interactions. The objectives of this survey were to provide estimates of densities of key forage and predator species in the western basin of Lake Erie, to... Categories: Data; Types: Citation; Tags: Field sampling, Freshwater ecosystems, Lake Erie, Michigan, Ohio, All tags... Ontario, Population dynamics, biota, inlandWaters, Fewer tags Northern Continental Divide Ecosystem grizzly bear (Ursus arctos) genetic profiles (1998-2012) Two independent sampling methods were used to collect genetic samples from grizzly bears (Ursus arctos): (i) hair traps—corrals of barbed wire with lure in the center systematically distributed using an 8 x 8 km (1998, 2000) or 7 x 7 km (2004) grid and (ii) bear rubs—naturally occurring trees or other objects that bears rub on fitted with barbed wire (1998–2000, 2004, and 2009–2012). From 1998 to 2000, sampling occurred on 8000 km2 in the northern extent of the Northern Continental Divide Ecosystem (NCDE), whereas systematic and consistent, ecosystem-wide sampling occurred in 2004 and 2009–2012. In total, there were 6160 confirmed grizzly bear detections, leading to the identification of 1115 unique individual genotypes... Categories: Data; Types: Citation; Tags: Glacier National Park, Northern Continental Divide Ecosystem, USGS Science Data Catalog (SDC), genetic diversity, genotype, All tags... population dynamics, Fewer tags Lake Erie Fish Community Data, 2013-2017 Assessing the distribution and abundance of both predator and prey (forage) fish species is a cornerstone of ecosystem-based based fishery management, and supports decision making that considers food-web interactions. In support of binational Great Lakes fishery management the objectives of this survey were to: provide estimates of densities of key forage and predator species in the western basin of Lake Erie, to assess seasonal and spatial distributions of fishes, and to assess year class strength. A systematic grid sampling approach with 41 stations was sampled during June (Spring) and September (Autumn), starting in 2013. This data release adds 2017 data to the set – making it five years of continuous observation. Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Field sampling, Freshwater ecosystems, Lake Erie, Michigan, Ohio, All tags... Ontario, Population dynamics, biota, inlandWaters, Fewer tags Impact of Drought on Southwestern Pronghorn Population Trends and Predicted Trajectories Climate Projection Data Climate often drives ungulate population dynamics, and as climates change, some areas may become unsuitable for species persistence. Unraveling the relationships between climate and population dynamics, and projecting them across time, advances ecological understanding that informs and steers sustainable conservation for species. Using pronghorn (Antilocapra americana) as an ecological model, we used a Bayesian approach to analyze long-term population, precipitation, and temperature data from 18 subpopulations in the southwestern United States. We determined which long-term (12 and 24 months) or short-term (gestation trimester and lactation period) climatic conditions best predicted annual rate of population growth... Categories: Data; Types: Citation; Tags: Antilocapra americana, Arizona, Drought, Drought, Fire and Extreme Weather, Mammals, All tags... National CASC, New Mexico, Texas, Utah, Wildlife and Plants, climate change, density dependence, integrated Bayesian population models, large herbivores, population dynamics, rainfall effects, southwestern US, southwestern United States, southwestern United States, standardized precipitation index, ungulates, western Texas, Fewer tags Impact of Drought on Southwestern Pronghorn Population Trends and Predicted Trajectories Predictor Model Climate often drives ungulate population dynamics, and as climates change, some areas may become unsuitable for species persistence. Unraveling the relationships between climate and population dynamics, and projecting them across time, advances ecological understanding that informs and steers sustainable conservation for species. Using pronghorn (Antilocapra americana) as an ecological model, we used a Bayesian approach to analyze long-term population, precipitation, and temperature data from 18 subpopulations in the southwestern United States. We determined which long-term (12 and 24 months) or short-term (gestation trimester and lactation period) climatic conditions best predicted annual rate of population growth... Categories: Data; Types: Citation; Tags: Antilocapra americana, Arizona, Drought, Drought, Fire and Extreme Weather, Mammals, All tags... National CASC, New Mexico, Texas, Utah, Wildlife and Plants, climate change, density dependence, integrated Bayesian population models, large herbivores, population dynamics, rainfall effects, southwestern US, southwestern United States, southwestern United States, standardized precipitation index, ungulates, western Texas, Fewer tags Lake Erie Collaborative Science and Monitoring Initiative 2014 In 2014, the USGS Lake Erie Biological Station participated in the Coordinated Science and Monitoring Initiative (CMSI) program, a program founded by the U.S. Environmental Protection Agency (EPA) and Environment Canada in the 1990s as a means to focus collaborative research attention on one of the five Great Lakes each year (on a rotating schedule) as a means to increase scientific knowledge for Great Lakes restoration. The Lake Erie survey examined the food web across a nearshore to offshore gradient, matching the sampling design the preceding USGS studies of the other four Great Lakes (2010-2013). We sampled all trophic levels in all three lake basins across multiple seasons in order to determine nutrient availability... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Lake Erie, Michigan, Nutrient cycling, Ohio, Ontario, All tags... USGS Science Data Catalog (SDC), Zooplankton, aquatic ecosystems, benthic ecosystems, biota, field sampling, fish, food web, inlandWaters, nutrient content (water), population dynamics, Fewer tags Lake Ontario Deepwater Sculpin Bottom Trawl Catch and Biological Data, 1996-2016 Deepwater Sculpin are important in oligotrophic lakes as one of the few fishes that use deep profundal habitats and link invertebrates in those habitats to piscivores. In Lake Ontario the species was once abundant, however drastic declines in the mid-1900s led some to suggest the species had been extirpated and ultimately led Canadian and U.S. agencies to elevate the species’ conservation status in the 1990s. Following multiple decades of annual surveys with no captures, Deepwater Sculpin were first caught in low numbers in 1996 and by the early 2000s there were indications of population recovery. These data sets were used to update the status of Lake Ontario Deepwater Sculpin through 2016 to inform resource management... Categories: Data; Types: Citation; Tags: Lake Ontario, biota, population dynamics Coastal California San Francisco Gartersnake Capture-Mark-Recapture Data (2008-2013) These data are multi-state capture histories of 273 individual San Francisco gartersnakes collected at a site before and after a portion of the site was burned. Data collection began in 2008 and continued until 2013, and the prescribed fire was applied in the fall of 2010. These data support the following paper: Halstead, B. J., Thompson, M. E., Amarello, M. , Smith, J. J., Wylie, G. D., Routman, E. J. and Casazza, M. L. (2018), Effects of prescribed fire on San Francisco gartersnake survival and movement. Jour. Wild. Mgmt.. . doi:10.1002/jwmg.21585 Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: San Mateo County, CA, USGS Science Data Catalog (SDC), Wildlife Biology, capture-mark-recapture, capturing (animals), All tags... controlled fires, endangered species, population dynamics, survival, Fewer tags Gulf Watch Alaska, Benthic Monitoring Component: Sea Otter Aerial Survey Data Kenai Fjords National Park, 2002-2016 These data are is part of the Gulf Watch Alaska (GWA) long term monitoring program, nearshore monitoring component. Specifically, these data describe sea otter (Enhydra lutris) aerial survey observations from the waters around Kenai Fjords National Park between 2002 and 2016. Sea otters are a keystone predator, well known for structuring the nearshore marine ecosystem through their consumption of invertebrate prey. The dataset consists of 3 comma delimited files exported from Microsoft Excel. The data consists of 1. Strip transect counts, 2. Intensive Search Unit (ISU) counts, and 3. Transect coordinates. For each aerial survey, a pilot flew an airplane at an altitude of 91m over pre-determined transects while an... Categories: Data; Types: Citation; Tags: Enhydra lutris, Gulf of Alaska, Kenai Fjords National Park, abundance, aerial survey, All tags... biota, coastal ecosystems, distribution, ecology, ecosystem monitoring, environment, marine ecology, marine mammals, monitoring, population dynamics, sea otters, Fewer tags Oregon Spotted Frog (Rana pretiosa) Monitoring in the Oregon Cascades 2012-2015 ***This dataset is superseded by Adams, M.J., Pearl, C.A., McCreary, B., Galvan, S.K., and Rowe, J.C., 2017, Oregon Spotted Frog (Rana pretiosa) Monitoring in the Oregon Cascades 2012-2016: U.S. Geological Survey data release, http://doi.org/10.5066/F7QC01NV*** This dataset contains information from visual encounter surveys conducted between 2012 and 2015 by USGS as part of an ongoing Oregon spotted frog (Rana pretiosa) monitoring effort in the Oregon Cascade Mountain Range. We surveyed 91 sites using a rotating frame design in the Klamath and Deschutes Basins, Oregon, which encompass most of the species' core extant range. Data consist of spotted frog counts aggregated by date, location, and life stage, as well... Categories: Data; Types: Citation; Tags: Aquatic ecology, Cascade Range, Deschutes County, Klamath County, Lane County, All tags... Linn County, Native species, OR, Oregon, Pacific Northwest, Population dynamics, USGS Science Data Catalog (SDC), Wasco County, Fewer tags Columbia Spotted Frog (Rana luteiventris) Breeding at Grazing Exclosures in Eastern Oregon 2002-2010 and 2013 We studied the short-term effects of full and partial livestock grazing exclosures on Columbia Spotted Frog (CSF; Rana luteiventris) populations using a controlled manipulative field experiment with pre- and post-treatment data. This dataset includes vegetation data collected 2002-2010 and 2013 at 94 lakes and ponds in and around the Blue Mountains in eastern Oregon. Data collection followed standardized survey protocols and included annual oviposition surveys and vegetation surveys. These data allowed for quantification of CSF breeding as related to vegetation within and outside of grazing exclosures at each site. Categories: Data; Types: Citation; Tags: Aquatic Biology, Aquatic ecology, Baker County, Blue Mountains, Ecology, All tags... Native species, OR, Oregon, Pacific Northwest, Population dynamics, USGS Science Data Catalog (SDC), Wildlife Biology, Fewer tags Electrofishing Results and Sampling of Bull Trout and Other Aquatic Vertebrates in the Vicinity of Yellow Pine, Idaho 2016 This data set summarizes electrofishing effort, observations, and tissue sampling of aquatic vertebrates near Yellow Pine, Idaho. Sampling was conducted using a backpack electrofishing unit at two reference sites including Cane Creek and Sugar Creek, and at three mine impact sites including Sugar Creek and Cinnabar Creek. Juvenile Bull Trout (Salvelinus confluentus) were present at all five sites and were the primary species targeted during our sampling effort. Additional tissue samples of Sculpin, and amphibians were taken when available. Where possible, a two pass (quantitative depletion) electrofishing survey was conducted at each site for non-USGS stakeholders (Nez Perce Tribe and Idaho Department of Fish and... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Aquatic Biology, Biota, Bull Trout, Cane Creek, Cinnabar Creek, All tags... Freshwater Ecosystems, Idaho, Population Dynamics, Salmon River, Stibnite, Sugar Creek, USGS Science Data Catalog (SDC), Yellow Pine, Fewer tags