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Spatial analysis of habitat selection by Sitka black-tailed deer in Southeast Alaska, USA

Author:
Kang-Tsung Chang   David L. Verbyla   Jeffrey J. Yeo  


Journal:
Environmental Management


Issue Date:
1995


Abstract(summary):

We used a vector-based geographic information system (GIS) to examine habitat selection by radiocollared Sitka black-tailed deer (Odocoileus hemionus sitkensis) in logged forests of southeast Alaska. Our main objective was to explain deer habitat selection relative to old-growth/clear-cut edges and edge habitats at two different spatial scales. Deer home ranges contained higher percentages of recent clear-cuts (50-69%) than the study area (37%; P lt 0.01) and had higher old-growth/clear-cut edge densities than expected by chance (P lt 0.01). Deer relocation points were closer to old-growth/clear-cut edges (average = 135 m) than random points located within each deer's relocation area (average = 168 m; P = 0.05). Likewise, deer relocations were closer to old-growth/clear-cut edges than points randomly located within old-growth stands or recent clear-cuts (P lt 0.01). As the size of clear-cuts increased, both deer relocation density and the proportion of a clear-cut occupied by deer home ranges decreased. Because old growth is important deer habitat and clear-cuts can produce deer forage for only 20-30 years after logging in southeast Alaska, deer management plans such as preserving entire watersheds and maintaining mixes of old growth and recent clear-cut have been proposed. Our data suggest that deer need a diversity of habitats near each other within their home ranges.


Page:
579-589


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