The role of habitat in avian community composition: physiognomy or floristics?
The role of habitat in avian community composition: physiognomy or floristics?
复制标题
栖息地在鸟类群落组成中的作用：面貌还是植物区系？
作者：
J. Rotenberry
在相当广泛的生境类型中，鸟类的分布和丰度可能与植物分类组成的关系比与植被的结构和配置的关系更密切。来自北美中部和西部八个代表性草原栖息地的鸟类样本与这一假设一致。超过一半（55%）的鸟类群落组成的变化与植物区系的变化，但只有三分之一（35%）与地貌。将植物区系和地貌的相互作用相互分离，突出了它们之间在鸟类区系方面的差异。据推测，鸟类/植物类群协会，特别是在类似的栖息地类型，介导的特定食物资源，不同的植物类群提供。摘要指数，如多样性措施模糊了植物或动物组合的分类信息内容，使用这种指数可能会阻碍检测这里所描述的关系。
SummaryIt has been proposed that within rather broad habitat types the distribution and abundance of bird species may be more closely associated with plant taxonomic composition than with the structure and configuration of the vegetation. Birds from a sample of eight representative grassland habitats in middle and western North America are consistent with this hypothesis. Over half (55%) of the variation in bird community composition was associated with floristic variation, but only a third (35%) was associated with physiognomy. Separating the interacting effects of floristics and physiognomy from each other served to accentuate the difference between them with respect to the avifauna. It is postulated that bird species/plant taxa associations, especially within similar habitat types, are mediated by the specific food resources that different plant taxa provide. Summary indices such as diversity measures obscure the taxonomic information content of plant or animal assemblages, and the use of such indices has likely impeded detection of the relationships described here.