Variable effects of dispersal on productivity of bacterial communities due to changes in functional trait composition.
Variable effects of dispersal on productivity of bacterial communities due to changes in functional trait composition.
复制标题
DOI：
10.1371/journal.pone.0080825
复制
发表时间：
2013
期刊：
影响因子：
3.7
通讯作者：
Lindström ES
中科院分区：
文献类型：
--
作者：
Severin I;Östman Ö;Lindström ES
以往的研究表明，不同的扩散率和生态系统功能之间的关系，但原因和机制的变化扩散率功能模式是目前未知的。在这项研究中，我们在实验室实验中使用了六个细菌湖水社区，以调查社区之间的传播如何影响社区生产力，通过评估三种不同的机制：1）分类多样性的变化，2）系统发育多样性的变化或3）功能性状组成的变化。实验分两个阶段进行;（A）透析袋实验，其中操纵六个群落之间的扩散速率，并记录随后的细菌多样性和生长速率的变化，以及（B）再生长实验，其中我们操纵可用资源以研究分类群在某些有机碳资源上生长的情况，即它们的功能性状。因此，从实验（B）中，我们可以估计实验（A）中群落功能性状的变化。细菌生产的影响，分散，但不一致的湖泊。无论是在分类或系统发育多样性与扩散的变化可以解释所观察到的扩散生产力的关系。相反，性状组成的变化与传播，特别是社区的能力，使用p-香豆酸，芳香族化合物，可以解释所观察到的扩散生产力的关系。这种特性的变化引起的传播似乎特别重要的细菌生产力在沃茨具有高芳香性的有机物池。我们的结论是，细菌群落的扩散的影响可以影响生态系统功能以不同的方式，通过改变功能的关键性状，这是重要的当地环境。
Previous studies have shown variable relationships between dispersal rate and ecosystem functioning, but the reasons for and mechanisms behind variable dispersal rate – functioning patterns are currently unknown. In this study we used six bacterial lake water communities in a laboratory experiment in order to investigate how dispersal among communities influences community productivity by evaluating three different mechanisms: 1) changes in taxonomic diversity, 2) changes in phylogenetic diversity or 3) changes in the composition of functional traits. The experiment was conducted in two phases; (A) a dialysis bag experiment where the dispersal rate among six communities was manipulated and the subsequent change in bacterial diversity and growth rate was recorded, and (B) a regrowth experiment where we manipulated available resources to study how well a taxon grows on certain organic carbon resources, i.e. their functional traits. From experiment (B) we could thus estimate changes in functional traits in communities in experiment (A). Bacterial production was affected by dispersal, but not consistently among lakes. Neither change in taxonomic or phylogenetic diversity with dispersal could explain the observed dispersal – productivity relationships. Instead, changes in trait composition with dispersal, especially the communities’ ability to use p-coumaric acid, an aromatic compound, could explain the observed dispersal – productivity relationships. Changes in this trait caused by dispersal seemed especially important for bacterial productivity in waters with a high aromaticity of the organic matter pool. We conclude that the effect of dispersal on bacterial communities can affect ecosystem functioning in different ways, through changes in functional key-traits which are important for the local environment.
登录
查看更多内容
影响因子：
5.1
作者：
Gomez-Consarnau, Laura;Lindh, Markus V.;Pinhassi, Jarone
通讯作者：
Pinhassi, Jarone
影响因子：
4.8
作者：
Helmus, Matthew R.;Ives, Anthony R.
通讯作者：
Ives, Anthony R.
影响因子：
5.8
作者：
Kembel, Steven W.;Cowan, Peter D.;Webb, Campbell O.
通讯作者：
Webb, Campbell O.
影响因子：
8.8
作者：
Becker, Joachim;Eisenhauer, Nico;Jousset, Alexandre
通讯作者：
Jousset, Alexandre
影响因子：
11
作者：
Martiny, Adam C.;Treseder, Kathleen;Pusch, Gordon
通讯作者：
Pusch, Gordon