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Multiple Causes of High Extinction Risk in Large Mammal Species
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Multiple Causes of High Extinction Risk in Large Mammal Species
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Journal Article
Multiple Causes of High Extinction Risk in Large Mammal Species
2005
Overview
Many large animal species have a high risk of extinction. This is usually thought to result simply from the way that species traits associated with vulnerability, such as low reproductive rates, scale with body size. In a broad-scale analysis of extinction risk in mammals, we find two additional patterns in the size selectivity of extinction risk. First, impacts of both intrinsic and environmental factors increase sharply above a threshold body mass around 3 kilograms. Second, whereas extinction risk in smaller species is driven by environmental factors, in larger species it is driven by a combination of environmental factors and intrinsic traits. Thus, the disadvantages of large size are greater than generally recognized, and future loss of large mammal biodiversity could be far more rapid than expected.
Publisher
American Association for the Advancement of Science,The American Association for the Advancement of Science
Subject
/ Animal, plant and microbial ecology
/ Animals
/ Biological and medical sciences
/ Conservation of Natural Resources
/ Conservation, protection and management of environment and wildlife
/ Female
/ Fundamental and applied biological sciences. Psychology
/ Humans
/ Mammalia
/ Mammals
/ Modeling
/ Multiple Regression Analysis
/ Parks, reserves, wildlife conservation. Endangered species: population survey and restocking
/ Risk
/ Species
/ Weaning
