On the brink between extinction and persistence
On the brink between extinction and persistence
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DOI：
10.1186/1745-6150-3-47
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发表时间：
2008-11-19
期刊：
影响因子：
5.5
通讯作者：
Loeschcke, Volker
中科院分区：
文献类型：
--
作者：
Pertoldi, Cino;Bach, Lars A.;Loeschcke, Volker
规模波动的性质是至关重要的，在预测未来的人口持续性，独立的变异是否源于外力或从人口更新过程的动态。截取零的风险高度依赖于总体大小的方差与其均值的关系。一个种群不灭绝所需的最小种群规模可以通过一个将方差与算术平均值联系起来的比例方程来确定。通过使用推导出的表达式定义的参数的缩放方程的调和平均值，我们展示了如何有可能分离的域的持久性从灭绝，并促进识别濒临灭绝的种群。
The nature of size fluctuations is crucial in forecasting future population persistence, independently of whether the variability stems from external forces or from the dynamics of the population renewal process. The risk of intercepting zero is highly dependent on the way the variance of the population size relates to its mean. The minimum population size required for a population not to go extinct can be determined by a scaling equation relating the variance to the arithmetic mean. By the use of a derived expression for the harmonic mean defined by the parameters of the scaling equation we show how it is possible to separate the domains of persistence from those of extinction and to facilitate the identification of populations on the brink of extinction.