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The US Prairie Pothole Region (PPR) has experienced some of the highest rates of grassland loss in North America over a time that coincides with dramatic declines in grassland songbird populations yet increasing abundance of most grassland-nesting duck species except for northern pintail. To provide more insight into this contradiction, we propose to capitalize on long-term databases to evaluate how a key population driver nest survival for North American ducks has responded to system changes in the region including landscape and climatic factors. Outcomes of these analyses will contribute to testing primary conservation planning assumptions for the PPJV a vital component of the PPJV Strategic Habitat Conservation...
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These tables serve as input data for hierarchical models investigating interactions between raven density and Greater Sage-grouse nest success. Observations were recorded over an 11 year time period, spanning from 2009 through 2019. The model is run in JAGS via R, the code is publicly available via the U.S. Geological Survey's GitLab (O'Neil et al. 2023). We recommend not making any changes or edits to the tables unless the user is experienced with hierarchical modeling. References: O'Neil, S.T., Coates, P.S., Webster, S.C., Brussee, B.E., Dettenmaier, S.J., Tull, J.C., Jackson, P.J., Casazza, M.L., and Espinosa, S.P., 2023, Code for a hierarchical model of raven densities linked with sage-grouse nest survival...
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This file contains information pertaining to the survey plot including date and time of surveyed, survey conditions, plot location, and ecological and biological conditions of the survey plot. The data providers have invested considerable effort in QA/QC, but it is possible that undetected errors remain. It is strongly recommended that careful attention be paid to the contents of the metadata file associated with these data to evaluate data set limitations, restrictions or intended use. The originators of this dataset shall not be held liable for improper or incorrect use of the data described and/or contained herein. Potential users of these data should first contact the data authors listed below, as potential...
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Map of cumulative 38-day nest survival predicted from a Bayesian hierarchical shared frailty model of sage-grouse nest fates. The midpoint of coefficient conditional posterior distributions of 38-day nest survival were used for prediction at each 30 meter pixel across the landscape.
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Ranked index of model-projected nest site selection integrated with nesting productivity (i.e., nest survival), demonstrating the spatial distribution of adaptive vs. maladaptive habitat selection at each 30 m pixel. Hierarchical models of nest selection and survival were fit to landscape covariates within a Bayesian modeling framework in Nevada and California from 2009 through 2017 to develop spatially explicit information about nest site selection and survival consequences across the landscape. Habitat was separated into 16 classes ranking from high (1) to low (16). Habitat ranked highest where the top nest selection and survival classes intersected (adaptive selection), whereas the lowest rank occurred where...
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This file contains information on avian nests found during this study including species, date and time found, location, status, estimated incubation dates, tiny tag and camera monitoring and retrieval information, and nest fate. Note, that .ttd files viewed using Tinytag Explorer may have assessment times that are off by an hour, as the times displayed by Tinytag Explorer are calculated when the data is displayed and depend on the daylight saving settings of the PC at that time. For example, if a .ttd file is opened before and after DST settings change, then all times displayed by Tinytag Explorer will go forward or back. Also, in 2019 camera date and times were not set correctly prior to deployment. See fields...
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Rasters representing median raven density estimates, calculated from approximately 28,000 raven point count surveys conducted between 2009 and 2019. Estimates were the result of a Bayesian hierarchical distance sampling model, using environmental covariates on detection and abundance.
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This file includes R code to select annual sampling units for nest survival analysis on the Arctic National Wildlife Refuge using a stratified random sampling approach. We used the Generalized Random Tessellation Stratified (GRTS) procedure (Stevens and Olsen 2004) to obtain a spatially balanced sample of 28 plots in 2019 and 48 in 2022 within two of the four strata. In 2019, plots were equally allocated between wetland and moist strata, with 14 plots allocated to each. In 2022, additional plots were allocated to the moist stratum given the proportional availability on the landscape, with the final allocation being 30 moist plots and 18 wetland plots. We also selected an additional 20 “oversample” plots in each...
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Collection of video files taken of avian nests by Plotwatcher Pro–Time Lapse cameras during field work conducted on the Arctic National Wildlife Refuge. Photos are organized in folders by year. Naming convention for each photo includes nest ID and camera number. Within each NestID folder are a series of TLV files saved directly from cameras. TLV files can be saved as an AVI file to view in Windows. Note, in 2019 camera date and times were not set correctly prior to deployment. See ‘ANWR nest survival nest data’ for date and time as set on the camera at time of deployment. The data providers have invested considerable effort in QA/QC, but it is possible that undetected errors remain. It is strongly recommended that...
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Map of nesting habitat selection scores predicted from a resource selection function (RSF) developed from sage-grouse nest locations. Nest site selection was modeled using a generalized linear mixed model of used and random locations in a Bayesian modeling environment, and the midpoint of coefficient conditional posterior distributions were used for prediction. Continuous values were reclassified and ranked using a percent isopleth approach with respect to observed nest locations.
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We combined approximately 28,000 raven point count surveys with data from more than 900 sage-grouse nests between 2009 and 2019 within the Great Basin, USA. We modeled variation in raven density using a Bayesian hierarchical distance sampling approach with environmental covariates on detection and abundance. Concurrently, we modeled sage-grouse nest survival using a hierarchical frailty model as a function of raven density as well as other environmental covariates that influence risk of failure. Raven density commonly exceeded more than 0.5 ravens per square kilometer and increased at low relative elevations with prevalent anthropogenic development and/or agriculture. Reduced sage-grouse nest survival was strongly...
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This collection of files contains independent assessments of both the Tiny tag and camera data, as well as temperature actograms produced by Martin Bulla in his assessment of the Tiny Tag data. Each assessment is saved as a separate file, containing the name of the reviewer in the file name. Note, that .ttd files viewed using Tinytag Explorer may have assessment times that are off by an hour, as the times displayed by Tinytag Explorer are calculated when the data is displayed and depend on the daylight saving settings of the PC at that time. For example, if a .ttd file is opened before and after DST settings change, then all times displayed by Tinytag Explorer will go forward or back. Also, in 2019 camera date and...
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This collection of files contains temperature data files (.ttd files) downloaded directly from Tiny Tag devices, as well exported temperature data as .csv files for each nest monitored with Tiny Tags by year. File names include nest ID. .ttd files can be viewed using Tinytag Explorer. Note, however, that the times displayed by Tinytag Explorer are calculated when the data is displayed and depend on the daylight saving settings of the PC at that time. For example, if a .ttd file is opened before and after DST settings change, then all times displayed by Tinytag Explorer will go forward or back. All .csv files were exported using the Tinytag Explorer during the same daylight savings time as when the data were collected....
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Collection of photographs taken during nest survival field work on the Arctic National Wildlife Refuge. Photos include those taken of nests and nest habitat at time of revisit (i.e., after nests hatched or failed), completed datasheets, by crew members, and select images from the Plotwatcher Pro–Time Lapse cameras. Directories include ANWR_nest_survival_nest_photos, ANWR_nest_survival_datasheet_photos, ANWR_nest_survival_other_photos, ANWR_nest_survival_plot_camera_photos. Note, in 2019 camera date and times were not set correctly prior to deployment. See ‘ANWR nest survival nest data’ for date and time as set on the camera at time of deployment. The data providers have invested considerable effort in QA/QC, but...
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Reproductive success is a key demographic parameter that can have profound impacts on a species’ population trend; however, broad-scale nest survival data are unavailable for all Arctic-breeding shorebird species. Accordingly, we set out to 1) measure current nest survival rates across a large area of the Arctic National Wildlife Refuge, and 2) identify predators of nests, so as to help elucidate the potential role reproductive failure plays in current shorebird population declines. This information is also relevant for assessing the indirect effects of land management decisions such as oil and gas development on a species’ reproductive success. In 2019 and 2022, we monitored 129 shorebird nests of 9 species using...
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We applied spatially-explicit models to a spatiotemporally robust dataset of greater sage-grouse (Centrocercus urophasianus) nest locations and fates across wildfire-altered sagebrush ecosystems of the Great Basin ecoregion, western USA. Using sage-grouse as a focal species, we quantified scale-dependent factors driving nest site selection and nest survival across broad spatial scales in order to identify wildfire impacts and other environmental influences on variation in nesting productivity across a broad ecoregion spanning mesic and xeric shrub communities. To investigate the consequences of habitat selection and explore the potential for a source-sink reproductive landscape, we sought to classify nesting habitat...
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These rasters are the result of calculating the difference in Greater Sage-grouse nest survival after a simulated reduction of raven density to 0.1 ravens per square kilometer. The difference in nest survival represents spatial variation in potential to improve nest survival by reducing raven impacts. The extent of each individual raster is the extent of the field site at which sage-grouse nest observations were recorded.
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Native grasslands have been altered to a greater extent than any other biome in North America. The habitats and resources needed to support breeding performance of grassland birds endemic to prairie ecosystems are currently threatened by land management practices and impending climate change. Climate models for the Great Plains prairie region predict a future of hotter and drier summers with strong multiyear droughts and more frequent and severe precipitation events. We examined how fluctuations in weather conditions in eastern Colorado influenced nest survival of an avian species that has experienced recent population declines, the Mountain Plover (Charadrius montanus). Nest survival averaged 27.2% over a 7-yr...


map background search result map search result map Drought and Cooler Temperatures Are Associated with Higher Nest Survival in Mountain Plovers Spatially-explicit Predictive Maps of Greater Sage-grouse Nest Selection Integrated with Nest Survival in Nevada and Northeastern California, USA Greater Sage-grouse Nest Survival, Nevada and California 2019 Greater Sage-grouse Nest Selection, Nevada and California 2019 Greater Sage-grouse Nest Site Source-Sink, Nevada and California 2019 Evaluating patterns of long-term system change and demographic response for grassland nesting ducks in the US Prairie Pothole Region Data to Support Hierarchical Models and Decision Support Maps to Guide Management of Subsidized Avian Predator Densities Estimates of Raven Impacts on Greater Sage-Grouse Nest Survival Delineated by Field Site in California, Nevada, and Idaho (2009 - 2019) Median Estimates of Raven Density in California, Nevada, and Idaho (2012 - 2019) Raven Observations near Greater Sage-Grouse Nests in the Great Basin and Bi-State Regions of the Western United States (2009 - 2019) Shorebird Nest survival on the Arctic National Wildlife Refuge Alaska Arctic National Wildlife Refuge shorebird nest survival camera images Arctic National Wildlife Refuge shorebird nest survival tiny tag data Arctic National Wildlife Refuge shorebird nest survival nest data Arctic National Wildlife Refuge shorebird nest survival photographs Arctic National Wildlife Refuge shorebird nest survival plot data Arctic National Wildlife Refuge shorebird nest survival plot selection Arctic National Wildlife Refuge shorebird nest survival protocols Arctic National Wildlife Refuge shorebird nest survival publications Arctic National Wildlife Refuge shorebird nest survival tiny tag camera assessment Shorebird Nest survival on the Arctic National Wildlife Refuge Alaska Arctic National Wildlife Refuge shorebird nest survival camera images Arctic National Wildlife Refuge shorebird nest survival tiny tag data Arctic National Wildlife Refuge shorebird nest survival nest data Arctic National Wildlife Refuge shorebird nest survival photographs Arctic National Wildlife Refuge shorebird nest survival plot data Arctic National Wildlife Refuge shorebird nest survival plot selection Arctic National Wildlife Refuge shorebird nest survival protocols Arctic National Wildlife Refuge shorebird nest survival publications Arctic National Wildlife Refuge shorebird nest survival tiny tag camera assessment Spatially-explicit Predictive Maps of Greater Sage-grouse Nest Selection Integrated with Nest Survival in Nevada and Northeastern California, USA Greater Sage-grouse Nest Selection, Nevada and California 2019 Greater Sage-grouse Nest Site Source-Sink, Nevada and California 2019 Greater Sage-grouse Nest Survival, Nevada and California 2019 Data to Support Hierarchical Models and Decision Support Maps to Guide Management of Subsidized Avian Predator Densities Estimates of Raven Impacts on Greater Sage-Grouse Nest Survival Delineated by Field Site in California, Nevada, and Idaho (2009 - 2019) Median Estimates of Raven Density in California, Nevada, and Idaho (2012 - 2019) Raven Observations near Greater Sage-Grouse Nests in the Great Basin and Bi-State Regions of the Western United States (2009 - 2019) Drought and Cooler Temperatures Are Associated with Higher Nest Survival in Mountain Plovers Evaluating patterns of long-term system change and demographic response for grassland nesting ducks in the US Prairie Pothole Region