Beta diversity of diatoms is driven by environmental heterogeneity, spatial extent and productivity
Beta diversity of diatoms is driven by environmental heterogeneity, spatial extent and productivity
复制标题
DOI：
10.1007/s10750-017-3117-3
复制
发表时间：
2017-02
期刊：
影响因子：
2.6
通讯作者：
Stéfano Zorzal-Almeida;L. M. Bini;D. C. Bicudo
中科院分区：
文献类型：
--
作者：
Stéfano Zorzal-Almeida;L. M. Bini;D. C. Bicudo
生产力、环境异质性和空间范围对微生物群落β多样性的同时影响很少被研究。在这里，我们评估了这些成分如何与热带水库中的硅藻贝塔多样性有关。我们假设硅藻β多样性与环境异质性、生产力和空间范围之间存在正相关关系。回归模型被用来模拟贝塔多样性作为非生物环境异质性、生产力、储集层形态、空间范围和栖息地异质性的不同度量的函数。我们的结果表明，贝塔多样性与环境异质性、生产力和空间范围有很强的关系。然而，与我们的假设相反，生产力与贝塔多样性呈负相关。我们推测，人工富营养化可能导致贝塔多样性降低(生物均质化)。此外，贝塔多样性和非生物环境异质性之间的关系取决于如何衡量这一组成部分。综上所述，环境异质性和扩散限制可能是决定热带储集层硅藻多样性的主要因素。
Simultaneous effects of productivity, environmental heterogeneity and spatial extent on beta diversity of microbial communities have seldom been investigated. Here, we evaluated how these components are related to diatom beta diversity in tropical reservoirs. We hypothesised positive relationships between diatom beta diversity and environmental heterogeneity, productivity and spatial extent. Regression models were used to model beta diversity as a function of different measures of abiotic environmental heterogeneity, productivity, reservoir morphology, spatial extent, and habitat heterogeneity. Our results suggest a strong relationship between beta diversity and environmental heterogeneity, productivity and spatial extent. However, contrary to our hypothesis, productivity was negatively related to beta diversity. We speculate that artificial eutrophication can lead to decreased beta diversity (biotic homogenisation). Furthermore, the relationship between beta diversity and abiotic environmental heterogeneity depends how this component was measured. In conclusion, environmental heterogeneity and dispersal limitation were likely the main factors that determined diatom beta diversity in tropical reservoirs.