Abstract Several studies attempt to understand the mechanisms underlying compensatory and synchronous dynamics, and how these mechanisms relate to community stability. For this purpose, the use of functional traits, in theory, would allow for a direct evaluation of whether functional similarity generates compensatory dynamics or interspecific synchrony. Likewise, a trait-based approach is also needed to evaluate the effect of functional biodiversity on community stability. Using phytoplankton data from the Cana Brava Reservoir (Goias State, Brazil), we tested whether interspecific synchrony depends on functional distance and whether variability in total abundance depends on community synchrony and functional diversity. We did not find a significant relationship between interspecific synchrony and functional distance. However, we found a predominance of positive correlations between pairs of species and a strong negative relationship between functional diversity and community variability. Our results suggest that interspecific synchrony cannot be reliably predicted by functional distance. Given the predominance of positive synchrony, we indirectly infer that environmental variations similarly controlled the dynamics of most species. Our findings also highlight the stabilizing role of functional diversity.

中文翻译：

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功能距离不能预测种间同步性，但功能多样性直接影响群落稳定性

摘要 几项研究试图了解补偿和同步动态背后的机制，以及这些机制如何与社区稳定性相关。为此，理论上，功能特征的使用将允许直接评估功能相似性是否产生补偿动态或种间同步。同样，还需要一种基于特征的方法来评估功能生物多样性对群落稳定性的影响。使用来自 Cana Brava 水库（巴西戈亚斯州）的浮游植物数据，我们测试了种间同步性是否取决于功能距离以及总丰度的变异性是否取决于群落同步性和功能多样性。我们没有发现种间同步性和功能距离之间存在显着关系。然而，我们发现物种对之间的正相关性占优势，功能多样性和群落变异性之间存在强烈的负相关关系。我们的结果表明，功能距离不能可靠地预测种间同步。鉴于正同步的优势，我们间接推断环境变化同样控制了大多数物种的动态。我们的发现还强调了功能多样性的稳定作用。我们间接推断，环境变化同样控制着大多数物种的动态。我们的发现还强调了功能多样性的稳定作用。我们间接推断，环境变化同样控制着大多数物种的动态。我们的发现还强调了功能多样性的稳定作用。