USE OF SPACE AND HABITATS BY THE EASTERN CHIPMUNK, TAMIAS-STRIATUS

被引:32
作者
BOWERS, MA [1 ]
机构
[1] UNIV VIRGINIA, BLANDY EXPTL FARM, CHARLOTTESVILLE, VA 22903 USA
关键词
CENTRAL-PLACE FORAGING; HABITAT USE; MICROHABITATS; PREDATION RISK; SMALL MAMMALS; TAMIAS STRIATUS;
D O I
10.2307/1382310
中图分类号
Q95 [动物学];
学科分类号
071002 ;
摘要
Regression analyses showed a significant, positive association between capture frequency of eastern chipmunks (Tamias striatus) and open-understory and closed-overstory habitats. Analyses within individual home ranges, however, showed that distance from burrows explained twice the variation in frequency of captures than did microhabitat structure (33 and 16% of the variation, respectively). Chipmunks used microhabitats in a spatially variable manner and according to some of the same rules that determine food choice in central-place foragers (i.e., they spent more time near to than far from burrows) and were more discriminating in use of microhabitat at greater than at closer distances. Capture frequency of transient (nonresident) chipmunks was more highly correlated with microhabitat than was that of residents. Analysis of patterns of spatial usage by individuals offers an alternative to population-level approaches and provides a more mechanistic basis for interpreting the use of both space and microhabitats.
引用
收藏
页码:12 / 21
页数:10
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