Effects of patch quality and network structure on patch occupancy dynamics of a yellow-bellied marmot metapopulation.
Effects of patch quality and network structure on patch occupancy dynamics of a yellow-bellied marmot metapopulation.
复制标题
斑块质量和网络结构对黄腹土拨鼠集合种群斑块占用动态的影响。
DOI：
10.1111/j.1365-2656.2006.01038.x
复制
发表时间：
2006
期刊：
影响因子：
--
通讯作者：
M. Oli
中科院分区：
文献类型：
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作者：
A. Ozgul;K. Armitage;D. Blumstein;D. Vanvuren;M. Oli
1.某一特定地点物种的存在/不存在是在生态实地研究期间可以收集的最简单的数据形式。我们利用13年(1990-2002年)的调查数据对科罗拉多州黄腹旱獭集合种群的随机斑块占用模型进行了参数化，考察了特定斑块的重要性以及立地质量、网络特征和区域随机性对集合种群持久性的影响。2.黄腹旱獭集合种群的持续生存强烈依赖于高质量的群落点，生存概率对这些点群质量的微小变化高度敏感。3.相对较少的群落点是区域持久性的最终原因。然而，质量较低的卫星站点也对集合种群的长期持久性做出了重大贡献，特别是在区域随机性较高的情况下。4.旱獭集合种群的北方网络比南方网络更稳定，南方网络的持续性对北方网络的依赖性较大。5.尽管集合种群动态的复杂模型可以更准确地描述集合种群动态，但这种模型是数据密集型的。我们的研究是随机斑块占用模型在哺乳动物物种上的极少数应用之一，它表明随机斑块占用模型可以使用易于收集的数据为集合种群动态提供重要的见解。
1. The presence/absence of a species at a particular site is the simplest form of data that can be collected during ecological field studies. We used 13 years (1990-2002) of survey data to parameterize a stochastic patch occupancy model for a metapopulation of the yellow-bellied marmot in Colorado, and investigated the significance of particular patches and the influence of site quality, network characteristics and regional stochasticity on the metapopulation persistence. 2. Persistence of the yellow-bellied marmot metapopulation was strongly dependent on the high quality colony sites, and persistence probability was highly sensitive to small changes in the quality of these sites. 3. A relatively small number of colony sites was ultimately responsible for the regional persistence. However, lower quality satellite sites also made a significant contribution to long-term metapopulation persistence, especially when regional stochasticity was high. 4. The northern network of the marmot metapopulation was more stable compared to the southern network, and the persistence of the southern network depended heavily on the northern network. 5. Although complex models of metapopulation dynamics may provide a more accurate description of metapopulation dynamics, such models are data-intensive. Our study, one of the very few applications of stochastic patch occupancy models to a mammalian species, suggests that stochastic patch occupancy models can provide important insights into metapopulation dynamics using data that are easy to collect.