Data and Tools

Biology and Ecosystems

Learn more about research and monitoring on freshwater, terrestrial, and marine ecosystems and the fish and wildlife within them. Healthy ecosystems provide our society with essential ecosystem services, such as crop pollination, water and air purification, harvestable populations of fish and wildlife, soil replenishment, pest control, and nutrient cycling.

Filter Total Items: 269
Date published: April 16, 2018

Dataset for Reproductive success and contaminant associations in tree swallows (Tachnycineta bicolor) nesting in the U.S. and Binational Great Lakes' Areas of Concern

During 2010-2014, tree swallow (Tachycineta bicolor) reproductive success was monitored at 68 sites across all 5 Great Lakes, including 58 sites located within Great Lakes Areas of concern (AOCs) and 10 non-AOCs. Sample eggs were collected from tree swallow clutches and analyzed for contaminants

Date published: April 12, 2018

2017 Known and Probable Grizzly Bear Mortalities in the Greater Yellowstone Ecosystem

Identifying the locations and causes of grizzly bear mortality is another key component in understanding the dynamics of this population. Over 80% of all documented bear mortalities are human-caused. Tracking human-caused bear deaths helps define patterns and trends that can direct management programs designed to reduce bear mortality.

Date published: April 12, 2018

2018 Known and Probable Grizzly Bear Mortalities in the Greater Yellowstone Ecosystem

Known mortality - a carcass is in hand; Probable mortality - evidence strongly suggests a mortality has occurred but no carcass is recovered.

Abbreviations: BOR = Bureau of Reclamation; BLM = Bureau of Land Management; BTNF = Bridger-Teton National Forest; COY = cub-of-the-year; CTNF = Caribou-Targhee National Forest; GNF = Gallatin National Forest; GTNP = Grand Teton National Park;...

Date published: April 6, 2018

Collection, analysis, and age-dating of sediment cores from salt marshes on the south shore of Cape Cod, Massachusetts, from 2013 through 2014

Elevation of the marsh surface was measured with RTK-GPS to evaluate where the marsh falls within the current tidal frame. The historic marsh surface elevation was then reconstructed using the calculated age of each depth interval and its elevation, assuming that elevations within this shallow zone (less than 30 cm) have been preserved for the past century.

 

Date published: March 30, 2018

How many birds have been banded in North America since 1960?

Explore our data and learn how USGS-BBL science is making a difference

Date published: March 30, 2018

Summaries of Banding and Encounter Data

Explore our data and learn how USGS-BBL science is making a difference

Date published: March 30, 2018

BBL Longevity Records

Explore our data and learn how USGS-BBL science is making a difference

Date published: March 29, 2018

If you want to request data from the BBL

Banding and encounter data are available for research purposes. Individual banding data records exist electronically starting in 1960. Pre-1960 banding data are available only for birds that have been encountered. Individual encounter data are available from 1913.

Date published: March 22, 2018

Variable Terrestrial GPS Telemetry Detection Rates: Parts 1 - 7—Data

Here we explore environmental effects on GPS fix acquisition rates across environmental conditions and detection rates for bias correction of terrestrial GPS-derived large mammal habitat use. We also evaluate patterns in missing data that relate to potential animal activities that change the orientation of antennae and characterize home-range probability of GPS detection for four species.

Date published: March 22, 2018

Flow management and fish density regulate salmonid recruitment and adult size in tailwaters across western North America—Data

These data are a compilation of rainbow and brown trout monitoring data collected by state agencies over several decades in tailwaters downriver of dams in Colorado, Utah, Montana, Wyoming, Idaho, New Mexico, Arizona, California, and Oregon.

Date published: March 22, 2018

Riparian vegetation, Colorado River, and climate: Five decades of spatiotemporal dynamics in the Grand Canyon with river regulation—Data

These data include image-based classifications of total vegetation from 1965, 1973, 1984, 1992, 2002, 2004, 2005, and 2009, and characteristics of the river channel along the riparian area of the Colorado River between Glen Canyon Dam and Lake Mead Reservoir.

Date published: March 19, 2018

Annual Variation Birds as indicators of contaminants in the Great Lakes

Tachycineta bicolor eggs and nestlings were collected from sites across the Great Lakes to quantify normal annual variation in total polychlorinated biphenyl (PCBs) exposure and to validate the sample size choice in earlier work. A sample size of 5 eggs or 5 nestlings per site was adequate to quantify exposure to PCBs in tree swallows given the current exposure levels and variation.