Vieira Thiago Bernardi, Brasil Leandro Schlemmer, da Silva Liriann Chrisley N, Tejerina-Garro Francisco Leonardo, de Aquino Pedro de Podestà Uchôa, Pompeu Paulo S, de Marco Paulo
Laboratório de Ictiologia de Altamira Faculdade de Ciências Biológicas Universidade Federal do Pará Altamira Pará Brazil.
Programa de Pós-graduação em Zoologia Universidade Federal do Pará Belém Pará Brazil.
Ecol Evol. 2020 Oct 15;10(21):12024-12035. doi: 10.1002/ece3.6804. eCollection 2020 Nov.
The identification of the mechanisms underlying patterns of species co-occurrence is a way to identify which process(es) (niche, neutral, or both) structure metacommunities. The current paper had the goal of identifying patterns of co-occurrence in Neotropical stream fish and determining which processes structure the fish metacommunity, and identifying any gradients underlying this structure. Results indicated that the metacommunity formed by the species pool was structured by a pattern of nested co-occurrence (hyperdispersed species loss) and a mass-effect mechanism. However, a set of core species, displaying a Clementsian pattern, was structured by a species-sorting mechanism. Both, hyperdispersed species loss and the Clementsian patterns point to a discrete set of communities within the metacommunity. These communities could be isolated by the water physicochemical conditions or morphological characteristics of the stream channel.
识别物种共存模式背后的机制是一种确定哪些过程（生态位、中性或两者皆有）构建元群落结构的方法。当前论文的目标是识别新热带溪流鱼类的共存模式，确定哪些过程构建了鱼类元群落的结构，并识别该结构背后的任何梯度。结果表明，由物种库形成的元群落是由嵌套共存模式（超分散物种损失）和质量效应机制构建的。然而，一组呈现克莱门茨模式的核心物种是由物种分选机制构建的。超分散物种损失和克莱门茨模式都指向元群落内一组离散的群落。这些群落可能被溪流的水理化条件或河道形态特征所隔离。
