Taxonomic and functional composition of arthropod assemblages across contrasting Amazonian forests

Arthropods represent most of global biodiversity, with the highest diversity found in tropical rainforests. Nevertheless, we have a very incomplete understanding of how tropical arthropod communities are assembled. We conducted a comprehensive mass-sampling of arthropod communities within three major habitat types of lowland Amazonian rainforest, including terra firme clay, white-sand, and seasonally-flooded forests in Peru and French Guiana. We examined how taxonomic and functional composition (at the family level) differed across these habitat types in the two regions. The overall arthropod community composition exhibited strong turnover among habitats and between regions. In particular, seasonally-flooded forest habitats of both regions comprised unique assemblages. Overall, 17.7% (26 of 147) of arthropod families showed significant preferences for a particular habitat type. We present a first reproducible arthropod functional classification among the 147 taxa based on similarity amo...

节肢动物构成全球生物多样性的主体，其最高多样性见于热带雨林。然而，我们对热带节肢动物群落的组装机制仍存在极大认知空白。我们在秘鲁和法属圭亚那的亚马逊低地雨林中，针对三种主要栖息地类型（包括terra firme粘土林、白砂林和季节性洪水林）的节肢动物群落开展了全面的大规模采样。我们分析了科级水平的分类组成与功能组成在不同栖息地类型及两个区域间的差异。整体节肢动物群落组成在栖息地间及区域间表现出显著的周转效应。特别地，两个区域的季节性洪水林栖息地均包含独特的群落组合。总体而言，17.7%（147科中的26科）的节肢动物科对特定栖息地类型表现出显著偏好。我们基于相似性，提出了针对这147个类群的首个可重复的节肢动物功能分类...