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原文連結
論文資訊
- 類型：已發表論文
- 日期：2015-01-27
摘要
營養級 cascades are indirect positive effects of 捕食者s on resources via control of intermediate consumers. Larger-bodied 捕食者s appear to induce stronger 營養級 cascades (a greater rebound of resource density toward carrying capacity), but how this happens is unknown because we lack a clear depiction of how the strength of 營養級 cascades is determined. Using consumer resource models, we first show that the strength of a 營養級 cascade has an upper limit set by the interaction strength between the basal 營養級 group and its consumer and that this limit is approached as the interaction strength between the consumer and its 捕食者 increases. We then express the strength of a 營養級 cascade explicitly in terms of 捕食者 body size and use two independent parameter sets to calculate how the strength of a 營養級 cascade depe
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