Competition and Coexistence with Multiple Life‐History Stages
Competition and Coexistence with Multiple Life‐History Stages
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多个生命史阶段的竞争与共存
DOI：
10.1086/587517
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Joel s. Brown
中科院分区：
文献类型：
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作者：
Jason D. Moll;Joel s. Brown
复杂的生活史会影响竞争者共存的条件吗？我们使用两物种、两阶段Ricker模型对此进行了研究。在复杂的生活史中，与每个生活史阶段相关的竞争系数表明了三种竞争结果之一-共存，交替稳定状态或竞争排斥-这取决于种内和种间竞争的相对大小。当这两个阶段暗示相同的结果时，只有那个结果才可能发生。当这些阶段表明不同的结果时，任何一个都可能占上风。也有可能出现紧急结果，其中结果不是由任何一个阶段暗示的。这可能发生在两个阶段表明竞争排斥相反的物种或当一个阶段表明交替稳定状态和其他建议共存。因此，确定具有复杂生活史的物种的共存机制可能需要考虑所有生活史阶段中的竞争相互作用。
Do complex life histories affect the conditions under which competitors can coexist? We investigated this using a two‐species, two‐stage Ricker model. With complex life cycles, the competition coefficients associated with each life‐history stage suggest one of three competitive outcomes—coexistence, alternate stable states, or competitive exclusion—that depend on the relative magnitudes of intraspecific and interspecific competition. When the two stages suggest the same outcome, only that outcome can occur. When the stages suggest different outcomes, either one may prevail. It is also possible to have emergent outcomes, in which the outcome is not suggested by either stage. This can occur when the two stages suggest competitive exclusion by opposite species or when one stage suggests alternate stable states and the other suggests coexistence. Therefore, determining the mechanisms of coexistence in species with complex life histories may require consideration of competitive interactions within all life‐history stages.