Links between metabolic plasticity and functional redundancy in freshwater bacterioplankton communities.
Links between metabolic plasticity and functional redundancy in freshwater bacterioplankton communities.
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DOI：
10.3389/fmicb.2013.00112
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发表时间：
2013
影响因子：
5.2
通讯作者：
Del Giorgio PA
中科院分区：
文献类型：
--
作者：
Comte J;Fauteux L;Del Giorgio PA
代谢可塑性和功能冗余是微生物群落的基本特性，它们塑造了它们对环境胁迫的反应，也介导了群落组成和功能之间的关系。然而，这些新出现的群落特性的实际量化一直是难以捉摸的，因此我们不知道它们如何在细菌群落中变化，以及它们与环境梯度和彼此之间的关系。在这里，我们提出了一个实验框架，使我们能够同时量化淡水浮游细菌群落的代谢可塑性和功能冗余，并探讨它们之间可能存在的联系。我们将代谢可塑性定义为单细胞特性（细胞壁完整性，细胞大小，单细胞活性）相对于群落组成变化的变化率。同样，我们将功能冗余定义为碳基质吸收能力相对于群落组成变化的变化率。我们评估了这两个关键的社区属性在移植实验中，浮游细菌从不同的水生栖息地在同一流域内从原来的水移植到沃茨从其他系统，不同的主要资源。我们的研究结果表明，代谢可塑性是细菌群落的内在属性，而功能冗余的表达似乎更依赖于环境因素。此外，功能冗余和代谢可塑性水平之间存在总体上强的正相关关系，这表明这些社区属性之间没有权衡，而是可能的共同选择。在细菌群落中功能冗余和可塑性的表达以及它们之间的联系中的明显连续性反过来表明，群落多样性和功能之间的联系也可能沿着连续体变化，从非常紧密到弱或不存在。
Metabolic plasticity and functional redundancy are fundamental properties of microbial communities, which shape their response to environmental forcing, and also mediate the relationship between community composition and function. Yet, the actual quantification of these emergent community properties has been elusive, and we thus do not know how they vary across bacterial communities, and their relationship to environmental gradients and to each other. Here we present an experimental framework that allows us to simultaneously quantify metabolic plasticity and functional redundancy in freshwater bacterioplankton communities, and to explore connections that may exists between them. We define metabolic plasticity as the rate of change in single-cell properties (cell wall integrity, cell size, single-cell activity) relative to changes in community composition. Likewise, we define functional redundancy as the rate of change in carbon substrate uptake capacities relative to changes in community composition. We assessed these two key community attributes in transplant experiments where bacterioplankton from various aquatic habitats within the same watershed were transplanted from their original water to waters from other systems that differ in their main resources. Our results show that metabolic plasticity is an intrinsic property of bacterial communities, whereas the expression of functional redundancy appears to be more dependent on environmental factors. Furthermore, there was an overall strong positive relationship between the level of functional redundancy and of metabolic plasticity, suggesting no trade-offs between these community attributes but rather a possible co-selection. The apparent continuum in the expression of both functional redundancy and plasticity among bacterial communities and the link between them, in turn suggest that the link between community diversity and function may also vary along a continuum, from being very tight, to being weak, or absent.
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影响因子：
11
作者：
Bertilsson, Stefan;Eiler, Alexander;Jorgensen, Niels Ole Gerslev
通讯作者：
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DOI：
10.1023/a:1020585711378
发表时间：
2002-01-01
影响因子：
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作者：
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通讯作者：
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DOI：
10.1073/pnas.0704716104
发表时间：
2007-12-26
影响因子：
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作者：
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通讯作者：
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DOI：
10.1073/pnas.1101591108
发表时间：
2011-08-23
影响因子：
11.1
作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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