Consequences of population topology for studying gene flow using link-based landscape genetic methods

Area of Science:

• Ecology
• Genetics
• Spatial Analysis

Background:

• Landscape genetics studies often analyze gene flow using link-based methods.
• These methods typically relate gene flow to landscape features and geographic distance.
• Population topology, the spatial arrangement of populations, is often overlooked.

Purpose of the Study:

• To highlight the importance of population topology in landscape genetics.
• To demonstrate how population topology influences gene flow analyses.
• To provide recommendations for incorporating population topology into studies.

Main Methods:

• Literature review of landscape genetics studies (first half of 2015).
• Computer simulations of gene flow.
• Theoretical examples and existing literature analysis.

Main Results:

• Population topology can significantly influence landscape genetic study outcomes.
• Careful selection of population pairs for analysis is crucial.
• Methods for incorporating topology as response and explanatory variables exist.

Conclusions:

• Population topology is a critical, underutilized factor in landscape genetics.
• Improved sampling strategies are needed to represent population topology.
• Statistical analyses in landscape genetics can be biased without considering topology.