Open AccessDistribution, movements and habitats of sage grouse Centrocercus urophasianus on the Upper Snake River Plain of Idaho: changes from the 1950s to the 1990s
Author(s) -
Leonard Kara M.,
Reese Kerry P.,
Connelly John W.
Publication year - 2000
Publication title -
wildlife biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.566
H-Index - 52
eISSN - 1903-220X
pISSN - 0909-6396
DOI - 10.2981/wlb.2000.025
Subject(s) - habitat , rangeland , range (aeronautics) , geography , population , ecology , population decline , grouse , environmental science , physical geography , biology , demography , materials science , sociology , composite material
The sage grouse Centrocercus urophasianus population level on the Upper Snake River Plain of Idaho has declined significantly over the past 40 years. We investigated migration patterns and seasonal ranges of these birds to compare to patterns from the 1950s and 1960s. Furthermore, we examined landscape changes that occurred between 1975 and 1992. Migration patterns have not changed since the 1950s. The grouse currently migrate up to 125 km and use an annual population range of at least 2,764 km 2 . The major landscape change since 1975 that occurred in sage grouse habitat was a decline in the total amount of winter range. Between 1975 and 1992,29,762 ha of sagebrush Artemisia spp. rangeland were converted to cropland, a 74% increase in cropland. Regression analysis suggested a relationship between sagebrush habitat loss and grouse population decline (R 2 = 0.59, P = 0.002). Approximately 1,244 km 2 of privately‐owned sagebrush on the study area could potentially be converted to cropland, which we predict would have serious negative implications for the sage grouse population.