EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
9/25/2018 | 9:30 AM - 9:45 AM | Factors Driving Greater Sage-Grouse Trends in the Eastern Portion of their Range: Anthropogenic, Fire, Habitat, Hunting, Ravens, and Weather | Eccles Conference Center Auditorium
Factors Driving Greater Sage-Grouse Trends in the Eastern Portion of their Range: Anthropogenic, Fire, Habitat, Hunting, Ravens, and Weather
Degradation of sagebrush (Artemisia spp.) habitat has occurred throughout the range of greater sage-grouse (Centrocercus urophasianus; hereafter “sage-grouse”). Areas with greater loss of sagebrush habitat are avoided by sage-grouse and congruent with lower demographic rates and lek extirpation. We evaluated the effects of habitat and potential predation, including anthropogenic, fire, habitat, hunting regulations, weather, and common raven (Corvus corax; hereafter “raven”) numbers, on lek trends of sage-grouse populations in the Powder River and Wyoming Basins from 1995–2014. Instantaneous growth rate (r) was positively associated with precipitation and negatively with hunting season length in the Powder River Basin population, and r was positively associated with precipitation but negatively with raven numbers for the Wyoming Basin population. Oil and gas well density was negatively associated with initial lek counts and time-varying carrying capacity (K) for both populations. In addition, the Powder River Basin population had a negative association of human density with K, and the Wyoming Basin population had negative associations with tree proportion and major road density on initial lek count and major road density and fire, tree, and cropland proportions on K. Our results expand knowledge on how spatiotemporal factors related to initial lek count, r, and K influence sage-grouse populations. However, we could not discern whether longer hunting seasons in the Powder River Basin were associated with lower r or collinear with general trend or another factor (e.g., West Nile virus could also explain lower r rather than hunting), because spatial variability in hunting exposure could not be designated.
Presentation:
This presentation has not yet been uploaded.
Handouts:
Handout is not Available
Transcripts:
CART transcripts are NOT YET available, but will be posted shortly after the conference
Presenters/Authors
Jonathan Dinkins
(), jonathan.dinkins@oregonstate.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Jeffrey Beck
(), University of Wyoming, jlbeck@uwyo.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Kirstie Lawson
(), kirstie.lawson09@gmail.com;
Biology Department
ASHA DISCLOSURE:
Financial -
Nonfinancial -