Spatial Analysis of Northern Goshawk Territories in the Black Hills, South Dakota

The condor

Robert W. Klaver¹ 

关键词: Accipiter gentilis;    Black Hills;    South Dakota;    forest management;    Northern Goshawk;    Ripley'sKfunction;    spatial statistics;   

DOI  :  10.1525/cond.2012.110080

学科分类：动物科学

来源: Central Ornithology Publication Office

【 摘 要 】

Abstract. The Northern Goshawk (Accipiter gentilis) is the largest of the three North American species of Accipiter and is more closely associated with older forests than are the other species. Its reliance on older forests has resulted in concerns about its status, extensive research into its habitat relationships, and litigation. Our objective was to model the spatial patterns of goshawk territories in the Black Hills, South Dakota, to make inferences about the underlying processes. We used a modification of Ripley's K function that accounts for inhomogeneous intensity to determine whether territoriality or habitat determined the spacing of goshawks in the Black Hills, finding that habitat conditions rather than territoriality were the determining factor. A spatial model incorporating basal area of trees in a stand of forest, canopy cover, age of trees >23 cm in diameter, number of trees per hectare, and geographic coordinates provided good fit to the spatial patterns of territories. There was no indica...

【 授权许可】

CC BY