Spatial variation in direct and indirect effects of climate and productivity on species richness of terrestrial tetrapods
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2021
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Resumo
Aim: We aimed to dissect the spatial variation of the direct and indirect effects of
climate and productivity on global species richness of terrestrial tetrapods.
Location: Global.
Time period: Present.
Major taxa studied: Terrestrial tetrapods.
Methods: We used a geographically weighted path analysis to estimate and map the
direct and indirect effects of temperature, precipitation and primary productivity on
species richness of terrestrial tetrapods across the globe.
Results: We found that all relationships shift in magnitude, and even in direction,
among taxonomic groups, geographical regions and connecting paths. Direct effects
of temperature and precipitation are generally stronger than both indirect effects
mediated by productivity and direct effects of productivity.
Main conclusions: Richness gradients seem to be driven primarily by effects of cli mate on organismal physiological limits and metabolic rates rather than by the amount
of productive energy. Reptiles have the most distinct relationships across tetrapods,
with a clear latitudinal pattern in the importance of temperature versus water.
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Biodiversity gradients, Climate, Geographically weighted regression, Metabolic theory, Non stationarity, Water–energy hypothesis, Path analysis, Structural equation modelling, Productivity, Species–energy relationship
Citação
BARRETO, Elisa et al. Spatial variation in direct and indirect effects of climate and productivity on species richness of terrestrial tetrapods. Global Ecology and Biogeography, Hoboken, v. 30, n. 9, p. 1899-1908, 2021. DOI: 10.1111/geb.13357. Disponível em: https://onlinelibrary.wiley.com/doi/epdf/10.1111/geb.13357. Acesso em: 31 ago. 2023.