arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1203.4482q-bio.PEcond-mat.stat-mechphysics.bio-phphysics.data-an
收藏

关于种群持续时间分布

On Species Persistence-Time Distributions

S. Suweis, E. Bertuzzo, L. Mari, I. Rodriguez-Iturbe, A. Maritan, A. Rinaldo

摘要:

我们提出了新的理论和经验的结果,在自然生态系统中的物种持续时间的概率分布。持续时间,定义为在给定的地理区域中物种的殖民化和局部灭绝之间发生的时间跨度,根据物种存在/不存在的局部观察经验估计。提出了一个连通抽样问题,推广并解析求解。物种持久性提供了一个直接的连接与关键的空间宏观生态格局,如物种面积和特有种面积的关系。我们的实证分析涉及两个不同的生态系统和类群:草本植物群落和河口鱼类数据库。尽管在生态相互作用和空间尺度的实质性差异,我们证实了早期的证据的持久性时间的缩放的一般性质,包括预测的影响的空间相互作用网络的结构。这里测试的框架允许直接调查的性质和程度的空间效应的背景下,生态系统动态。宏观生态格局的时空一致性是生态系统动态演化的基本特征。

英文摘要:

We present new theoretical and empirical results on the probability distributions of species persistence times in natural ecosystems. Persistence times, defined as the timespans occurring between species' colonization and local extinction in a given geographic region, are empirically estimated from local observations of species' presence/absence. A connected sampling problem is presented, generalized and solved analytically. Species persistence is shown to provide a direct connection with key spatial macroecological patterns like species-area and endemics-area relationships. Our empirical analysis pertains to two different ecosystems and taxa: a herbaceous plant community and a estuarine fish database. Despite the substantial differences in ecological interactions and spatial scales, we confirm earlier evidence on the general properties of the scaling of persistence times, including the predicted effects of the structure of the spatial interaction network. The framework tested here allows to investigate directly nature and extent of spatial effects in the context of ecosystem dynamics. The notable coherence between spatial and temporal macroecological patterns, theoretically derived and empirically verified, is suggested to underlie general features of the dynamic evolution of ecosystems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑