...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Predicted correspondence between species abundances and dendrograms of niche similarities.
【24h】

Predicted correspondence between species abundances and dendrograms of niche similarities.

机译：物种丰富度和生态位相似性树状图之间的预测对应关系。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We examine a hypothesized relationship between two descriptions of community structure: the niche-overlap dendrogram that describes the ecological similarities of species and the pattern of relative abundances. Specifically, we examine the way in which this relationship follows from the niche hierarchy model, whose fundamental assumption is a direct connection between abundances and underlying hierarchical community organization. We test three important, although correlated, predictions of the niche hierarchy model and show that they are upheld in a set of 11 communities (encompassing fishes, amphibians, lizards, and birds) where both abundances and dendrograms were reported. First, species that are highly nested in the dendrogram are on average less abundant than species from branches less subdivided. Second, and more significantly, more equitable community abundances are associated with more evenly branched dendrogram structures, whereas less equitable abundances are associated with less even dendrograms. This relationship shows that abundance patterns can give insight into less visible aspects of community organization. Third, one can recover the distribution of proportional abundances seen in assemblages containing two species by treating each branch point in the dendrogram as a two-species case. This reconstruction cannot be achieved if abundances and the dendrogram are unrelated and suggests a method for hierarchically decomposing systems. To our knowledge, this is the first test of a species abundance model based on nontrivial predictions as to the origins and causes of abundance patterns, and not simply on the goodness-of-fit of distributions.
机译：我们研究了两种关于群落结构的描述之间的假设关系：生态位重叠树状图，描述物种的生态相似性和相对丰度的模式。具体来说，我们研究了利基层次模型中这种关系的遵循方式，该模型的基本假设是丰度与底层层次社区组织之间的直接联系。我们测试了生态位层次模型的三个重要的但相互关联的预测，并显示它们在11个社区（包括鱼类，两栖动物，蜥蜴和鸟类）中得到了支持，在这些社区中都报告了丰度和树状图。首先，树状图中高度嵌套的物种的平均数量要比分支较少的物种的丰富程度低。其次，更重要的是，更公平的群落丰度与更均匀的分支树状图结构相关，而不那么公平的丰度与较不均匀的树状图相关。这种关系表明，丰富模式可以深入了解社区组织中不那么明显的方面。第三，通过将树状图中的每个分支点都视为两个物种，可以恢复包含两种物种的组合中所见比例丰度的分布。如果丰度和树状图无关，则无法实现此重构，因此建议采用一种方法对系统进行分层分解。据我们所知，这是对物种丰富度模型的首次测试，该模型基于关于丰富度模式的起源和成因的简单预测，而不仅仅是基于分布的拟合优度。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号