Contrasting responses of β-diversity and functional composition of aquatic insect communities across local to regional scales in Neotropical streams

Supplementary Material from the original research article entitled: “Contrasting responses of β-diversity and functional composition of aquatic insect communities across local to regional scales in Neotropical streams”. Authors: Gilberto Nicacio, Erlane José Cunha, Neusa Hamada and Leandro Juen. This article is a preprint and has not been certified by peer review available on bioRxiv (DOI: 10.1101/2020.09.14.297077). ARTICLE INFORMATION: In this manuscript, we tested variation in community composition of Ephemeroptera, Trichoptera, and Plecoptera between regions with distinct ecological gradients known as Amazonian interfluves. We calculated beta diversity by computing Sorensen dissimilarities and evaluated environmental factors interact to structure taxonomical and functional composition in streams. Thus, we addressed discussion about effects of habitat structure and geographical distances considered as the main determinants for driving species diversity and distribution. Then, our results provide empirical support for patterns of beta diversity and functional composition of aquatic insect assemblages between regional contexts. In summary, species replacement generated most of community dissimilarities and were associated with geographical distances and environmental variation.

本数据集为题为《新热带溪流局域至区域尺度水生昆虫群落的β多样性（β-diversity）与功能组成的差异化响应》的原创研究论文的补充材料。作者为Gilberto Nicacio、Erlane José Cunha、Neusa Hamada及Leandro Juen。本文为预印本，尚未经过同行评议，发布于bioRxiv平台（DOI: 10.1101/2020.09.14.297077）。

论文信息：本研究针对被称为亚马逊河间地块（Amazonian interfluves）的不同生态梯度区域，对比了蜉蝣目(Ephemeroptera)、毛翅目(Trichoptera)及襀翅目(Plecoptera)的群落组成差异。本研究通过计算索伦森相异度（Sorensen dissimilarities）估算β多样性，并评估了环境因子的交互作用如何塑造溪流中的分类学与功能组成。据此，本研究围绕生境结构与地理距离（二者被认为是驱动物种多样性与分布的核心决定因素）的效应展开讨论。本研究结果为不同区域背景下水生昆虫群落的β多样性与功能组成模式提供了实证支持。综上，物种更替是群落相异度的主要来源，且与地理距离及环境变异显著相关。