Habitat complexity drives aquatic community attributes, including the beta diversity components. We tested the hypothesis that community diversity, richness and density are higher on complex artificial substrates than on simple ones. Additionally, we hypothesised that the species occurrence would change from the simplest substrates to the more complex ones because complex habitats provide more niches and methods of exploiting environmental resources, thereby supporting larger numbers of organisms. We expected that the periphytic community would present a nestedness pattern when considering the quantitative index and turnover for the qualitative index. The effect of habitat complexity on the beta diversity was mediated by the relative species abundances. The periphytic algae density was higher on the complex substrates, but contrary to our expectations, the species richness and diversity did not increase on the complex substrates. Based on our findings, we suggest that habitat complexity can play a crucial role in structuring beta diversity patterns. However, we highlight that the responses of species turnover and nestedness to the variation in habitat complexity contrasted with the abundance and species occurrence approach. Additionally, we suggest that the species richness patterns in the periphytic community are independent of increases in the number of individuals.

中文翻译：

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生境的复杂性驱动周生藻类群落的周转和嵌套模式

栖息地的复杂性驱动着水生社区的属性，包括贝塔多样性的组成部分。我们检验了以下假设：在复杂的人工基质上，群落多样性，丰富性和密度要高于在简单的人工基质上。此外，我们假设该物种的发生将从最简单的底物变为更复杂的底物，因为复杂的栖息地提供了更多的生态位和开发环境资源的方法，从而支持了更多的生物。我们预计，在考虑定量指标和定性指标的周转率时，周围植物群落将呈现出嵌套模式。相对物种丰富度介导了栖息地复杂性对β多样性的影响。在复杂的基质上，周生藻类的密度较高，但是与我们的预期相反，复杂基质上的物种丰富度和多样性并未增加。根据我们的发现，我们建议栖息地复杂性可以在构建β多样性模式中发挥关键作用。但是，我们强调指出，物种更新和嵌套对栖息地复杂性变化的响应与丰度和物种发生方法形成对比。此外，我们建议在周围植物群落中物种丰富度模式与个体数量的增加无关。我们强调，物种更新和嵌套对栖息地复杂性变化的响应与丰度和物种发生方法形成对比。此外，我们建议在周围植物群落中物种丰富度模式与个体数量的增加无关。我们强调指出，物种更新和嵌套对生境复杂性变化的响应与丰度和物种发生方法形成对比。此外，我们建议在周围植物群落中物种丰富度模式与个体数量的增加无关。