生态过程在分类核心群落中的印记:对封闭在油中的自然复制微生物群落的分析。

IF 3.5 3区 生物学 Q2 MICROBIOLOGY
Verena S Brauer, Lisa Voskuhl, Sadjad Mohammadian, Mark Pannekens, Shirin Haque, Rainer U Meckenstock
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引用次数: 0

摘要

人们普遍认为,在来自相似生境的微生物群落中会出现一个分类学核心群落,因为相似的环境会选择具有相同特征的相同类群。然而,核心群落本身并不是选择的指标,因为它也可能产生于扩散和中性漂移,即偶然因素。在此,我们假设,由选择或偶然过程产生的核心群落应该是可以区分的。扩散和漂移产生的核心群落应具有相似的相对类群丰度,尤其是当核心群落的比例(即核心类群相对丰度的总和)较大时,而选择则可能产生不同的相对丰度。我们分析了特立尼达和多巴哥皮奇湖重油包裹的微小水滴中出现的 193 个微生物群落的 16S rRNA 基因序列核心群落。这些群落的相对丰度变化很大,核心群落的比例较大(68.0 ± 19.9%)。根据分散-漂移无效模型预测,在一定的分散概率范围内,核心群落比例与组成变异性呈负相关,这与观察到的数据基本不一致,表明选择在形成皮奇湖水滴群落方面发挥了重要作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Imprints of ecological processes in the taxonomic core community: an analysis of naturally replicated microbial communities enclosed in oil.

It is widely assumed that a taxonomic core community emerges among microbial communities from similar habitats because similar environments select for the same taxa bearing the same traits. Yet, a core community itself is no indicator of selection because it may also arise from dispersal and neutral drift, i.e. by chance. Here, we hypothesize that a core community produced by either selection or chance processes should be distinguishable. While dispersal and drift should produce core communities with similar relative taxon abundances, especially when the proportional core community, i.e. the sum of the relative abundances of the core taxa, is large, selection may produce variable relative abundances. We analyzed the core community of 16S rRNA gene sequences of 193 microbial communities occurring in tiny water droplets enclosed in heavy oil from the Pitch Lake, Trinidad and Tobago. These communities revealed highly variable relative abundances along with a large proportional core community (68.0 ± 19.9%). A dispersal-drift null model predicted a negative relationship of proportional core community and compositional variability along a range of dispersal probabilities and was largely inconsistent with the observed data, suggesting a major role of selection for shaping the water droplet communities in the Pitch Lake.

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来源期刊
FEMS microbiology ecology
FEMS microbiology ecology 生物-微生物学
CiteScore
7.50
自引率
2.40%
发文量
132
审稿时长
3 months
期刊介绍: FEMS Microbiology Ecology aims to ensure efficient publication of high-quality papers that are original and provide a significant contribution to the understanding of microbial ecology. The journal contains Research Articles and MiniReviews on fundamental aspects of the ecology of microorganisms in natural soil, aquatic and atmospheric habitats, including extreme environments, and in artificial or managed environments. Research papers on pure cultures and in the areas of plant pathology and medical, food or veterinary microbiology will be published where they provide valuable generic information on microbial ecology. Papers can deal with culturable and non-culturable forms of any type of microorganism: bacteria, archaea, filamentous fungi, yeasts, protozoa, cyanobacteria, algae or viruses. In addition, the journal will publish Perspectives, Current Opinion and Controversy Articles, Commentaries and Letters to the Editor on topical issues in microbial ecology. - Application of ecological theory to microbial ecology - Interactions and signalling between microorganisms and with plants and animals - Interactions between microorganisms and their physicochemical enviornment - Microbial aspects of biogeochemical cycles and processes - Microbial community ecology - Phylogenetic and functional diversity of microbial communities - Evolutionary biology of microorganisms
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