Microbial community assembly, theory and rare functions.
Microbial community assembly, theory and rare functions.
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DOI：
10.3389/fmicb.2013.00068
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发表时间：
2013
影响因子：
5.2
通讯作者：
Curtis TP
中科院分区：
文献类型：
--
作者：
Pholchan MK;Baptista Jde C;Davenport RJ;Sloan WT;Curtis TP
传统上，社区组装的观点是基于确定性生态位范式和随机中性模型的对比视角。本研究旨在确定我们是否可以使用从生态位和中立的角度设想的经验性干预措施来改变处理废水的反应器内的微生物群落的多样性和均匀性，并看看是否有任何相关的变化，内分泌干扰化合物（EDCs）的去除。从生物处理系统中系统地去除内分泌干扰物和微污染物是环境工程师面临的主要挑战。我们操纵对生物反应器中的实验中，“生态位”（时间变化的资源浓度和资源的复杂性）和“中性”（社区大小和移民）的属性被改变和可检测的多样性和去除类固醇雌激素的影响进行了评估。操作多样性的影响表明，生态位和中性过程是重要的社区组装。我们发现，环境条件的时间变化增加了多样性，但资源的复杂性没有。较大的社区具有更大的多样性，但试图通过增加土壤来增加移民会产生相反的效果。操作对EDC去除效率的影响是复杂的。多样性的下降，这是与均匀度的下降，与EDC去除的增加。一个简单的广义中性模型（校准的参数典型的污水处理厂）表明，多样性的减少应导致增加的丰度，一些表面上罕见的类群。我们的结论是，无论是利基和中立的观点，也不是多样性的影响，推定罕见的功能，可以正确地理解天真的定性观察。相反，关键微生物机制的相对重要性必须确定，理想情况下，数学表达。
Views of community assembly have traditionally been based on the contrasting perspectives of the deterministic niche paradigm and stochastic neutral models. This study sought to determine if we could use empirical interventions conceived from a niche and neutral perspective to change the diversity and evenness of the microbial community within a reactor treating wastewater and to see if there was any associated change in the removal of endocrine disrupting compounds (EDCs). The systematic removal of EDCs and micropollutants from biological treatment systems is a major challenge for environmental engineers. We manipulated pairs of bioreactors in an experiment in which “niche” (temporal variation in resource concentration and resource complexity) and “neutral” (community size and immigration) attributes were changed and the effect on the detectable diversity and the removal of steroidal estrogens was evaluated. The effects of manipulations on diversity suggested that both niche and neutral processes are important in community assembly. We found that temporal variation in environmental conditions increased diversity but resource complexity did not. Larger communities had greater diversity but attempting to increase immigration by adding soil had the opposite effect. The effects of the manipulations on EDC removal efficiency were complex. Decreases in diversity, which were associated with a decrease in evenness, were associated with an increase in EDC removal. A simple generalized neutral model (calibrated with parameters typical of wastewater treatment plants) showed that decreases in diversity should lead to the increase in abundance of some ostensibly taxa rare. We conclude that neither niche and neutral perspectives nor the effect of diversity on putative rare functions can be properly understood by naïve qualitative observations. Instead, the relative importance of the key microbial mechanisms must be determined and, ideally, expressed mathematically.
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影响因子：
4.4
作者：
Lauber, Christian L.;Hamady, Micah;Fierer, Noah
通讯作者：
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影响因子：
12.8
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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影响因子：
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作者：
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通讯作者：
Shimizu, Y
DOI：
10.1073/pnas.0507535103
发表时间：
2006-01-17
影响因子：
11.1
作者：
Fierer, N;Jackson, RB
通讯作者：
Jackson, RB