Long-term changes in sage grouse Centrocercus urophasianus populations in western North America

被引:149
作者
Connelly, John W. [1 ]
Braun, Clait E. [2 ]
机构
[1] Idaho Dept Fish & Game, Pocatello, ID 83204 USA
[2] Wildlife Res Ctr, Colorado Div Wildlife, Ft Collins, CO 80526 USA
关键词
Artemisia; Centrocercus urophasianus; habitat; North America; population decline; sage grouse;
D O I
10.2981/wlb.1997.028
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 [生物信息与计算生物学]; 0713 [生态学];
摘要
Available data indicate that sage grouse Centrocercus urophasianus have declined throughout their range. This species presently occurs in 11 U.S. States and in two Canadian provinces. In nine states having long-term data, breeding populations have declined by 17-47% ((x) over bar = 33%) from the long-term average. Six states have long-term information on sage grouse production. In five of these states, production has declined by 10-51% ((x) over bar = 25%) from the long-term average. Habitat deterioration, loss, and fragmentation have reduced the quantity and quality of nesting and early brood-rearing habitat causing population declines. Factors appearing to be largely responsible for the changes in habitats and, ultimately, sage grouse populations over wide areas of western North America are discussed, and hypotheses that could be tested to provide better insight into sage grouse population declines are suggested. Once these changes are better understood, conservation strategies that address protection and rehabilitation of sagebrush Artemisia spp. rangelands should be developed and implemented in each state and province to halt the decline of sage grouse and initiate recovery.
引用
收藏
页码:229 / 234
页数:6
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