Testing a mechanistic explanation for the latitudinal gradient in mammalian species richness across North America
作者： David J. Currie , A. Marm Kilpatrick , Warren P. Porter , William A. Mitchell
DOI:
关键词: Biology 、 Body size and species richness 、 Mammal 、 Optimal foraging theory 、 Ecology 、 Habitat 、 Spatial variability 、 Species richness 、 Species diversity 、 Range (biology)
摘要: Hypothesis: Spatial variation in species richness is caused by increased maintenance metabolic costs that increase habitat overlap and decrease richness. Organisms: Non-volant mammals North America. Results: The latitudinal gradient could be completely explained costs. Additional spatial was positively correlated with the number of habitats (vegetation types range elevation) an area. Conclusion: Local processes selection availability are important mechanisms determining
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