ArticleLandscape ecology2026
Time-lag in the interacting effects of habitat amount and fragmentation on genetic diversity in red squirrels (
Article in Landscape ecology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Authors and funding
4 authors.
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Abstract
Context: Genetic diversity is important for adaptation and persistence of populations. It is influenced by many scale-dependent factors including demographic history and interactions with surrounding landscape, including the availability of habitat. Objectives: We aim to determine the independent and interactive effects of habitat amount and habitat fragmentation on red squirrel ( Methods: We deployed over 1100 hair tubes across five 16 × 16 km study areas in the south of France to gather red squirrel hair samples, and genotyped 443 individuals at 16 microsatellite loci. Using moving windows, we calculated the proportion and number of patches of forest habitat around sample locations across time periods from 1900 to 2019 and within distances between 4 and 18 km. We fit mixed-effects models correlating genetic diversity to these metrics. Results: We found a significant positive interaction between the amount of forest habitat and the number of patches when modeling genetic diversity. We present evidence that genetic diversity is most closely related to landscape conditions roughly 40 generations (40 years) prior to sampling, and at broad spatial scales (12 km radius or larger). Conclusions: Our research provides additional insight into the effects of habitat fragmentation per se (i.e. independently of habitat amount) on biodiversity, in addition to the scales of effect. Understanding the scales at which habitat loss and fragmentation impact genetic diversity is important for predicting and mitigating future biodiversity impacts. Supplementary Information: The online version contains supplementary material available at 10.1007/s10980-026-02374-3.
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