Data from: Do flood pulses structure amphibian communities in floodplain environments?

Beta diversity can provide insights into the processes that regulate
communities subjected to frequent disturbances, such as flood pulses,
which control biodiversity in floodplains. However, little is known about
which processes structure beta diversity of amphibians in floodplains.
Here, we tested the influence of flood pulses on the richness,
composition, and beta diversity of amphibians in Amazonian floodplain
environments. We also evaluated indicator species for each environment. We
established linear transects in three environments: low várzea, high
várzea, and macrophyte rafts. Species richness decreased and beta
diversity increased according to the susceptibility of habitats to flood
pulses. Indicator species differed among environments according to forest
succession promoted by the flood pulse. The decrease in species richness
between high and low várzea is due to non-random extinctions. The higher
rates of species turnover between várzeas and macrophyte rafts are driven
by the colonization of species adapted to open areas. Our results
highlight that the maintenance of complex environments is needed to
protect biodiversity in floodplains.

β多样性（beta diversity）可揭示调控频繁受干扰群落的过程机制，例如控制洪泛区生物多样性的洪水脉冲。然而，目前对洪泛区两栖动物β多样性的构建过程知之甚少。本研究探讨了洪水脉冲对亚马逊洪泛区环境中两栖动物物种丰富度、群落组成及β多样性的影响，同时评估了各环境中的指示物种。我们在三种环境中设置了线性样带：低 várzea、高 várzea 和大型水生植物浮筏。物种丰富度随栖息地对洪水脉冲的敏感性增加而降低，β多样性则随之升高。指示物种在不同环境间的差异与洪水脉冲驱动的森林演替相关。高、低 várzea 之间物种丰富度的下降源于非随机灭绝事件；várzea 与大型水生植物浮筏之间较高的物种周转速率由适应开阔区域的物种定殖所驱动。研究结果强调，维持复杂的环境结构对于保护洪泛区生物多样性至关重要。