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Original file (1,440 × 1,080 pixels, file size: 1.35 MB, MIME type: image/gif, looped, 29 frames, 1 min 1 s)
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Summary
| Description |
Sequential estimates of occupied ranges for grizzly bears in the Greater Yellowstone Ecosystem during 1990–2018. Range extents are based on methods described in Bjornlie et al. (2014). Verified grizzly bear locations from a variety of sources, including VHF and GPS telemetry locations, sightings, mortalities, and human-bear conflicts for consecutive 10-year period were compiled and mapped onto a 3-km by 3-km grid. Zonal analysis and ordinary kriging was then applied to develop a predicted surface of occupied range. The procedure was applied to subsequent years by moving up the 15-year time period in 1-year increments (i.e., the frame labeled 1990 used location data obtained during 1976‒1990, the frame labeled 1991 used data obtained during 1977‒1991, etc. through 2018). (Animation by D. Bjornlie, Wyoming Game and Fish Department) |
| Date | circa 2019 |
| Source | https://www.usgs.gov/media/images/animated-image-showing-grizzly-bear-range-expansion-gye-1990-2018 |
| Author | United States Geological Survey |
Licensing
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This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 15:38, 13 October 2019 | | 1,440 × 1,080 (1.35 MB) | A11w1ss3nd | {{Information |description ={{en|1=Sequential estimates of occupied ranges for grizzly bears in the Greater Yellowstone Ecosystem during 1990–2018. Range extents are based on methods described in Bjornlie et al. (2014). Verified grizzly bear locations from a variety of sources, including VHF and GPS telemetry locations, sightings, mortalities, and human-bear conflicts for consecutive 10-year period were compiled and mapped onto a 3-km by 3-km grid. Zonal analysis and ordinary kriging was th... |
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