Authors
Stephen F Spear, Niko Balkenhol, Marie‐Josee Fortin, Brad H McRae, KIM Scribner
Publication date
2010/9
Journal
Molecular ecology
Volume
19
Issue
17
Pages
3576-3591
Publisher
Blackwell Publishing Ltd
Description
Measures of genetic structure among individuals or populations collected at different spatial locations across a landscape are commonly used as surrogate measures of functional (i.e. demographic or genetic) connectivity. In order to understand how landscape characteristics influence functional connectivity, resistance surfaces are typically created in a raster GIS environment. These resistance surfaces represent hypothesized relationships between landscape features and gene flow, and are based on underlying biological functions such as relative abundance or movement probabilities in different land cover types. The biggest challenge for calculating resistance surfaces is assignment of resistance values to different landscape features. Here, we first identify study objectives that are consistent with the use of resistance surfaces and critically review the various approaches that have been used to parameterize …
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