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• W2139629920 abstract "Spatial autocorrelation (SAC) is often observed in species distribution data, and can be caused by exogenous, autocorrelated factors determining species distribution, or by endogenous population processes determining clustering such as dispersal. However, it remains debated whether SAC patterns can actually reveal endogenous processes. We reviewed studies measuring dispersal of the salamander Salamandra salamandra , to formulate a priori hypotheses on the scale at which dispersal is expected to determine population distribution. We then tested the hypotheses by analysing SAC in distribution data, and evaluating whether controlling for the eff ect of environmental variables can reveal endogenous processes. We surveyed 565 streams to obtain species distribution data; we also recorded landscape and microhabitat features known to aff ect the species. We used multiple approaches to tease apart endogenous and exogenous SAC: the analysis of residuals of logistic regression models considering diff erent environmental variables; the analysis of eigenvectors extracted by several implementations of spatial eigenvector mapping. In capture – mark – recapture studies, 98% of individuals moved 500 m or less. Both species distribution and environmental features were strongly autocorrelated. Th e residuals of logistic regression relating species to environmental variables were autocorrelated at distances up to 500 m; analyses considering diff erent sets of environmental variables, or assuming non-linear species habitat relationships, yielded identical results. Th e results of spatial eigenvector mapping strongly depended on the matrix of distances used. Nevertheless, the eigenvectors of models with best fi t were autocorrelated at distances up to 200 – 500 m. Th e concordance between multiple approaches suggests that 500 m is the scale at which dispersal connects breeding localities, increasing probability of occurrence. If exogenous variables are correctly identifi ed, the analysis of SAC can provide important insights on endogenous population processes, such as the fl ow of individuals. SAC analysis can also provide important information for conservation, as the existence of metapopulations or population networks is essential for long term persistence of amphibians." @default.
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• W2139629920 date "2011-12-01" @default.
• W2139629920 modified "2023-10-01" @default.
• W2139629920 title "Can patterns of spatial autocorrelation reveal population processes? An analysis with the fire salamander" @default.
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• W2139629920 doi "https://doi.org/10.1111/j.1600-0587.2011.06483.x" @default.
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