When less is more: positive population-level effects of mortality.
When less is more: positive population-level effects of mortality.
复制标题
DOI：
10.1016/j.tree.2014.08.006
复制
发表时间：
2014-11
影响因子：
16.8
通讯作者：
Arne Schröder;A. van Leeuwen;T. Cameron
中科院分区：
文献类型：
--
作者：
Arne Schröder;A. van Leeuwen;T. Cameron
实验和理论研究表明，对人口施加的死亡率可能会违反直觉地增加特定生活史阶段的密度或总人口密度。人们越来越了解死亡率对人口水平的积极影响，这揭示了对人口、社区和应用生态学的影响。协调理论和数据，我们发现用于研究死亡率影响的数学模型在预测的影响和提出的机制方面有所不同。实验主要证明了死亡率随阶段特定密度的增加。我们认为，经验证据支持基于阶段结构人口模型的理论，但不支持基于非结构化模型的理论。我们的结论是，特定阶段的积极死亡率影响在自然界中可能很常见，并且考虑种群内的个体差异对于发展生态理论至关重要。
Experimental and theoretical studies show that mortality imposed on a population can counter-intuitively increase the density of a specific life-history stage or total population density. Understanding positive population-level effects of mortality is advancing, illuminating implications for population, community, and applied ecology. Reconciling theory and data, we found that the mathematical models used to study mortality effects vary in the effects predicted and mechanisms proposed. Experiments predominantly demonstrate stage-specific density increases in response to mortality. We argue that the empirical evidence supports theory based on stage-structured population models but not on unstructured models. We conclude that stage-specific positive mortality effects are likely to be common in nature and that accounting for within-population individual variation is essential for developing ecological theory.