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~ ~~ interagency Steering Committee for the California Spotted Owl Assessment. The 13 chapters cover the assessment of thecurrent status of theCaliforniaspotted owl, its biology and habitat use, and forests wherethe subsoecies occurs in the
Development of the Northwest Forest Plan (NWFP) was motivated by concerns about the over-harvest of late-seral forests and the effects of intensive forest management on the long-term viability of the Northern Spotted Owl (Strix occidentalis caurina). Following several years of intense political and legal debates, the final NWFP was approved in 1994. Even(More)
Designing a reserve system for a threatened territorial species such as the Northern Spotted Owl requires the balancing of biological necessity against economic reality. The Spotted Owl conservation plan and the Pacific Northwest timber industry are in conflict because both demand large areas of mature and old-growth coniferous forests. The pri-may focus of(More)
The Northern Spotted Owl (Strix occidentalis cau-rina) is closely associated witb mature and old-growth coniferous forests in the Pacific Northwest There has been a rapid loss and fragmentation of this habitat over the last half century, which may jeopardize tbe long-term survival of the species through reduction of dispersal success. In this paper we(More)
Spotted owls in the Southern California Province have an insular population structure characterized by large (about 200 pair sites) to small (about 2-4 pair sites) local populations distributed among discrete mountain ranges (fig. 9A, table 9A). The distribution of habitat "islands" is discontinuous across the landscape, reflecting natural discontinuities(More)
Breeding birds were censused along four elevational gradients in the Adirondack Mountains, New York, and the Green Mountains, Vermont. The bird communities of the four gradients were basically similar in species composition, richness and amplitude patterns. Three measures of species diversity decreased with increasing elevation. Low-elevation communities(More)
Spatially explicit population models are becoming increasingly useful tools for population ecologists, conservation biologists, and land managers. Models are spatially explicit when they combine a population simulator with a landscape map that describes the spatial distribution of landscape features. With this map, the locations of habitat patches,(More)
Linear conservation areas may function as biological corridors, but they may not mitigate against additional habitat loss H abitat loss and fragmentation are among the most pervasive threats to the conservation of biological diversity (Wilcove et al. 1986, Wilcox and Murphy 1985). Habitat fragmentation often leads to the isolation of small populations,(More)