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Patterns of abundance and co-occurrence in aquatic plant communities

机译：水生植物群落的丰度和共生模式

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摘要

Aquatic plants are well suited as subjects for studies on the distribution and abundance of co-occurring species, especially due to the simple structure of their communities, well defined toposequences and relatively easily measurable environmental factors. Here we show that underwater plants occurring in semi-natural lakes form stable communities, where species interactions dominate over dispersal dynamics to form a modular community structure with a high degree of zonation (turnover) and low within-module species richness. In turn, human-induced disturbance largely destroyed the modular structure. Our results indicate that (1) species abundance distributions (SADs) of underwater plant communities are well described by the lognormal model; (2) environmental characters did not significantly influence the SADs of underwater plant communities; (3) log-series SADs do not indicate specific types of community organization; (4) in our lake communities only few satellites (tourists) occur; (5) the co-occurrence of species is highly dependent on the turnover across lakes and water depth zones; and (6) species zonation is a function of lake properties.
机译：水生植物非常适合作为共生物种分布和丰度研究的对象，特别是由于其群落结构简单，确定的可能性和相对容易测量的环境因素。在这里，我们显示出半自然湖泊中的水下植物形成稳定的群落，其中物种相互作用在扩散动力学上占主导地位，从而形成具有高度分区（周转）和低模块内物种丰富度的模块化群落结构。反过来，人为干扰极大地破坏了模块化结构。我们的结果表明：（1）对数正态模型很好地描述了水下植物群落的物种丰富度分布（SAD）； （2）环境特征对水下植物群落的SAD没有显着影响； （3）日志系列SAD并未指明社区组织的特定类型； （4）在我们的湖泊社区中，只有很少的卫星（游客）出现； （5）物种的共存高度依赖于跨湖泊和水深区的周转率； （6）物种分区是湖泊性质的函数。

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