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原文連結
論文資訊
- 類型：已發表論文
- 日期：2008
摘要
族群 densities of birds and mammals have been shown to decrease with body mass at approximately the same rate as metabolic rates increase, indicating that energetic needs constrain endotherm 族群 densities. In ectotherms, the exponential increase of metabolic rate with body temperature suggests that environmental temperature may additionally constrain 族群 densities. Here we test simple bioenergetic models for an ecologically important group of ectothermic vertebrates by examining 483 lizard 族群s. We find that lizard 族群 densities decrease as a 冪次定律 of body mass with a slope approximately inverse to the slope of the relationship between metabolic rates and body mass. Energy availability should limit 族群 densities. As predicted, environmental productivity has a positive effect on lizard density, str
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