Two dominant forms of multisite similarity decline – Their origins and interpretation DOI Creative Commons
David C. Deane, Cang Hui, Mélodie A. McGeoch

et al.

Ecology and Evolution, Journal Year: 2023, Volume and Issue: 13(3)

Published: March 1, 2023

Abstract The number of species shared by two or more sites is a fundamental measure spatial variation in composition. As are included the comparison composition, average across them declines, with rate increasingly dependent on only most widespread species. In over 80% empirical communities, models decline multiple (multisite similarity decline) follow one distinct forms. An exponential form assumed to reflect stochastic assembly and power law niche‐based sorting, yet these explanations largely untested, little known how forms arise nature. Using simulations, we first show that distribution differentiates forms, favored where such occupy than ~75% sites. We reasoned less cosmopolitan within communities would manifest as differences community biodiversity properties, specifically aggregated within‐species distributions, even relative abundance weaker between‐species associations. tested confirmed relationships using 80 datasets, suggesting multisite offers basis predict landscape‐scale loss gain reflected different local‐scale structures. Such understanding could, for example, be used changes competitive interactions following shifts species' distributions. propose origin decline, including high among‐site abiotic variation, sampling highly specialized (narrow niche width) taxa, strong dispersal limitation. recommend evaluated alternative hypotheses assembly.

Language: Английский

Two dominant forms of multisite similarity decline – Their origins and interpretation DOI Creative Commons
David C. Deane, Cang Hui, Mélodie A. McGeoch

et al.

Ecology and Evolution, Journal Year: 2023, Volume and Issue: 13(3)

Published: March 1, 2023

Abstract The number of species shared by two or more sites is a fundamental measure spatial variation in composition. As are included the comparison composition, average across them declines, with rate increasingly dependent on only most widespread species. In over 80% empirical communities, models decline multiple (multisite similarity decline) follow one distinct forms. An exponential form assumed to reflect stochastic assembly and power law niche‐based sorting, yet these explanations largely untested, little known how forms arise nature. Using simulations, we first show that distribution differentiates forms, favored where such occupy than ~75% sites. We reasoned less cosmopolitan within communities would manifest as differences community biodiversity properties, specifically aggregated within‐species distributions, even relative abundance weaker between‐species associations. tested confirmed relationships using 80 datasets, suggesting multisite offers basis predict landscape‐scale loss gain reflected different local‐scale structures. Such understanding could, for example, be used changes competitive interactions following shifts species' distributions. propose origin decline, including high among‐site abiotic variation, sampling highly specialized (narrow niche width) taxa, strong dispersal limitation. recommend evaluated alternative hypotheses assembly.

Language: Английский

Citations

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