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原文連結
論文資訊
- 類型：已發表論文
- 日期：2012
摘要
營養級 interactions govern biomass fluxes in ecosystems, and stability in 食物網s. Knowledge of how 營養級 interaction strengths are affected by differences among habitats is crucial for understanding variation in ecological systems. Here we show how substantial variation in consumption-rate data, and hence 營養級 interaction strengths, arises because consumers tend to encounter resources more frequently in three dimensions (3D) (for example, arboreal and pelagic zones) than two dimensions (2D) (for example, terrestrial and benthic zones). By combining new theory with extensive data (376 物種, with body masses ranging from 5.24 x 10(-14) kg to 800 kg), we find that consumption rates scale sublinearly with consumer body mass (exponent of approximately 0.85) for 2D interactions, but superlinearly (exponen
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