NDLI: Modeling patch occupancy: Relative performance of ecologically scaled landscape indices

Content Provider	Springer Nature Link
Author	Rizkalla, Carol E. Moore, Jeffrey E. Swihart, Robert K.
Copyright Year	2008
Abstract	In fragmented landscapes, the likelihood that a species occupies a particular habitat patch is thought to be a function of both patch area and patch isolation. Ecologically scaled landscape indices (ESLIs) combine a species’ ecological profile, i.e., area requirements and dispersal ability, with indices of patch area and connectivity. Since their introduction, ESLIs for area have been modified to incorporate patch quality. ESLIs for connectivity have been modified to incorporate niche breadth, which may influence a species’ ease in crossing the non-habitat matrix between patches. We evaluated the ability of 4 ESLIs, the original and modified indices of area and connectivity, to explain patterns in patch occupancy of 5 forest rodents. Occupancy of eastern gray squirrels (Sciurus carolinensis), North American red squirrels (Tamiasciurus hudsconicus), fox squirrels (Sciurus niger), white-footed mice (Peromyscus leucopus), and eastern chipmunks (Tamias striatus) was modeled at 471 sites in 35 landscapes sampled from the upper Wabash River basin in Indiana. Models containing ESLIs received support for gray squirrels, red squirrels, and chipmunks. Modified ESLIs were important in models for red squirrels. However, none of the models demonstrated high predictive ability. Incorporating habitat quality and using surrogate measures of dispersal can have important effects on model results. Additionally, different responses of species to area, isolation, and habitat quality suggest that generalizing patterns of metapopulation dynamics was not justified, even across closely related species.
Starting Page	77
Ending Page	88
Page Count	12
File Format	PDF
ISSN	09212973
Journal	Landscape Ecology
Volume Number	24
Issue Number	1
e-ISSN	15729761
Language	English
Publisher	Springer Netherlands
Publisher Date	2008-10-05
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Connectivity Forest rodent Metapopulation Niche breadth Patch area Plant Sciences Ecology Forestry Plant Ecology Landscape Ecology Forestry Management
Content Type	Text
Resource Type	Article
Subject	Geography, Planning and Development Ecology Nature and Landscape Conservation

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