Cited by 1,081Genetic diversity and population structureWildlife-Road Interactions and ConservationForensic and Genetic Research

ISOLATION BY RESISTANCE

McRae, Brad H.·2006·Evolution

Abstract

Despite growing interest in the effects of landscape heterogeneity on genetic structuring, few tools are available to incorporate data on landscape composition into population genetic studies. Analyses of isolation by distance have typically either assumed spatial homogeneity for convenience or applied theoretically unjustified distance metrics to compensate for heterogeneity. Here I propose the isolation-by-resistance (IBR) model as an alternative for predicting equilibrium genetic structuring in complex landscapes. The model predicts a positive relationship between genetic differentiation and the resistance distance, a distance metric that exploits precise relationships between random walk times and effective resistances in electronic networks. As a predictor of genetic differentiation, the resistance distance is both more theoretically justified and more robust to spatial heterogeneity than Euclidean or least cost path-based distance measures. Moreover, the metric can be applied with a wide range of data inputs, including coarse-scale range maps, simple maps of habitat and nonhabitat within a species' range, or complex spatial datasets with habitats and barriers of differing qualities. The IBR model thus provides a flexible and efficient tool to account for habitat heterogeneity in studies of isolation by distance, improve understanding of how landscape characteristics affect genetic structuring, and predict genetic and evolutionary consequences of landscape change.

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  8. Yen L., 2005, Proceedings of the 13th European symposium on artificial neural networks, 317

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Authors
McRae, B. H.
Affiliations
University of California, Santa Barbara (US)
Corresponding author
McRae, Brad H.
Venue
Evolution
Published
2006-08
Volume
60
Issue
8
Pages
1551-1561
ISSN
  • 0014-3820 (ISSN-L)
  • 1558-5646
OpenAlex
W4295978838
Cited by
1,081
References
47
Citations by year
2026: 68 · 2025: 54 · 2024: 71 · 2023: 70 · 2022: 69 · 2021: 80 · 2020: 74 · 2019: 79 · 2018: 78 · 2017: 86 · 2016: 71 · 2015: 61 · 2014: 49 · 2013: 43 · 2012: 32
FWCI
4.93
Type
journal article
Language
en
Open access
closed
Locations
Evolution (publishedVersion)
Funders
U.S. Environmental Protection Agency
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic diversity and population structure
  • Physical Sciences › Environmental Science › Ecology › Wildlife-Road Interactions and Conservation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Forensic and Genetic Research
Keywords
isolation by resistance, resistance distance, isolation by distance, genetic differentiation, landscape heterogeneity, habitat heterogeneity, random walks, effective resistance, landscape genetics, population structure, habitat barriers, range map

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