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首页> 外文期刊>Aquatic Sciences >Disentangling the role of niche-based and spatial processes on anuran beta diversity in temporary ponds along a forest-grassland transition
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Disentangling the role of niche-based and spatial processes on anuran beta diversity in temporary ponds along a forest-grassland transition

机译：阐明基于生态位和空间过程对沿森林-草原过渡的临时池塘中无水生物β多样性的作用

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Evaluating beta diversity patterns along environmental gradients and different geographic ranges helps comprehend the roles of niche-based and spatial processes to metacommunity structure. Pond-breeding anuran composition depends on environmental predictors such as climate, vegetation type and habitat features as well as spatial processes (e.g., dispersal limitation or distances among patches). Here, we investigated the role of spatial and local (water chemistry and habitat structure) and regional (climate) environmental predictors to tadpole beta diversity (and its turnover and nestedness-resultant components) in temporary ponds distributed along a forest-grassland transition in the southern Brazilian Coastal Plain. Additionally, we investigated the role of the assessed predictors within forest and grassland sub-regions to test for congruence in their contribution across vegetation types. Turnover was the most relevant component of beta diversity. Spatial predictors alone explained beta diversity (and both components) at the broadest scale. However, the contribution of environmental and spatial predictors to beta diversity differed between sub-regions. Spatial and local environmental predictors independently explained beta diversity in the grassland, while in the forest sub-region, local predictors and spatially-structured climate were the most important. Our results revealed a complex interplay of niche-based and spatial assembly processes shaping anuran metacommunities. The different relationships of environmental and spatial predictors with beta diversity in the forest and grassland sub-regions suggest that the contribution of assembly processes to anuran metacommunity structure change with vegetation type.
机译：评估沿环境梯度和不同地理范围的β多样性模式有助于理解基于生态位和空间过程对元社区结构的作用。池塘养殖的无水铀组成取决于环境预测因素，例如气候，植被类型和栖息地特征以及空间过程（例如，扩散限制或斑块之间的距离）。在这里，我们研究了空间和局部（水化学和生境结构）和区域（气候）环境预测因素对沿森林-草原过渡带分布的临时池塘中poleβ多样性（及其周转率和巢度导致的成分）的作用。巴西南部沿海平原。此外，我们调查了森林和草地次区域内评估指标的作用，以检验其对植被类型贡献的一致性。营业额是Beta多样性中最相关的组成部分。仅空间预测变量就可以在最广泛的范围内解释β多样性（以及这两个组成部分）。但是，环境和空间预测因素对β多样性的贡献在各分区之间有所不同。空间和局部环境预测因素独立地解释了草原的β多样性，而在森林分区，局部预测因素和空间结构的气候最为重要。我们的研究结果揭示了基于小生境的空间组装过程与无脊椎动物元社区的复杂相互作用。森林和草地次区域中环境和空间预测因子与β多样性之间的不同关系表明，组装过程对无脊椎动物亚族群落结构的贡献随植被类型而变化。

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