Age, sex, density, winter weather, and population crashes in Soay sheep
Age, sex, density, winter weather, and population crashes in Soay sheep
复制标题
DOI：
10.1126/science.292.5521.1528
复制
发表时间：
2001-05-25
期刊：
影响因子：
56.9
通讯作者：
Grenfell, BT
中科院分区：
文献类型：
--
作者：
Coulson, T;Catchpole, EA;Grenfell, BT
量化密度，外在气候波动和人口对人口波动的影响是生态学中的一个持续挑战。我们分析了这些过程对Soay羊的人口崩溃的不规则模式的影响圣基尔达群岛，英国。由于种群的年龄和性别结构的波动与种群规模无关，而且由于不同年龄和性别的动物对密度和天气的反应不同，相同的天气条件可能导致相同规模的种群出现不同的动态。此外，密度依赖过程的强度是天气事件分布的函数。将人口异质性纳入人口模型可以影响动态及其对气候变化的反应。
Quantifying the impact of density, extrinsic climatic fluctuations, and demography on population fluctuations is a persistent challenge in ecology. We analyzed the effect of these processes on the irregular pattern of population crashes of Soay sheep on the St. Kilda archipelago, United Kingdom. Because the age and sex structure of the population fluctuates independently of population size, and because animals of different age and sex respond in different ways to density and weather, identical weather conditions can result in different dynamics in populations of equal size. In addition, the strength of density-dependent processes is a function of the distribution of weather events. Incorporating demographic heterogeneities into population models can influence dynamics and their response to climate change.