2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
9/26/2018 | 2:40 PM - 2:55 PM | Using Emerging Hotspot Analysis to Identify Sage-Grouse Source Sink Dynamics in Wyoming | Eccles Conference Center Auditorium
Using Emerging Hotspot Analysis to Identify Sage-Grouse Source Sink Dynamics in Wyoming
It has been well documented that anthropogenic land-use changes have compounding effects on wildlife populations. Greater sage-grouse (Centrocercus urophasianus) have been subjected to land-use change/habitat destruction throughout the intermountain west, which has contributed to population declines over the last 30-years and resulted in eight listing attempts for the species under provisions of the U.S. Endangered Species Act. However, recent evidence suggests that some sage-grouse populations might be stabilizing. We investigated population variability in sage-grouse productivity across Wyoming using hotspot/coldspot analysis to identify spatially varying patterns of where sage-grouse lek attendance is higher than average and lower than average (putatively sources verses sinks). We found coldspots increased at an average rate of ~10,661 km²/year, while hotspots increased by ~6,165 km² and there was an average of ~253±46 hotspot leks, and an average ~294±61 identified as coldspot leks. While the area of hotspots (R2=0.6242, p<0.0001) and coldspots (R2=0.7011, p<0.0001) increased linearly throughout time, the average number of males on hotspot leks increased throughout time (y = 0.4358x + 22.541, R² = 0.1168) whereas the average number of males in coldspot leks decreased (y = -0.1442x + 10.123, R² = 0.1415). We also found temperature maximum, oil/gas well density, and precipitation had negative relationships with hotspottedness and positive relationships with coldspottedness. From these observations, we conclude it will be important to assess what is causing the expansion in cold and hotspottedness and what management implications there may be in light of the interaction of climate and land use on overall population viability.
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Presenters/Authors
Emma Spence
(), spencee@bgsu.edu;
SEES
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Jeffrey Beck
(), University of Wyoming, jlbeck@uwyo.edu;
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Andrew Gregory
(), Bowling Green State University, agregor@bgsu.edu;
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