微核生物群落的凝聚加强了群落的稳定性并提高了多样性。

IF 3.5 3区 生物学 Q2 MICROBIOLOGY
Máté Vass, Anna J Székely, Ulla Carlsson-Graner, Johan Wikner, Agneta Andersson
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引用次数: 0

摘要

整个微生物群落的混合是一种经常发生但研究不足的现象。在这里,我们在微观世界实验中模拟了河口条件,将淡水河群落与咸海群落混合,并评估了不同混合过程引起的环境和群落凝聚对微真核生物群落的影响。聚合群落的群落组成向海洋母群落转移的迹象表明,群落聚合的结果是不对称的,此外,环境聚合对海洋母群落的影响一般较小。从群落内聚力推断出的群落稳定性在河流和海洋母群落之间存在差异,并在群落凝聚处理后有所增加。一般来说,群落凝聚会增加α多样性,并促进引入(或出现)更多(或稀有)物种所带来的竞争。这些竞争性相互作用反过来又具有稳定群落的作用,负内聚力比例的增加就是证明。微真核细胞的命运受混合比例和频率(即一次性与重复凝聚)的影响。也就是说,硅藻受到凝聚的负面影响,而真菌、纤毛虫和纤毛虫则在不同程度上得到促进,这取决于母群落的混合比例。我们的研究表明,当海洋母群落在最终群落中占主导地位时,凝聚结果的可预测性更高;当群落反复碰撞时,这种可预测性进一步增强。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Microeukaryote community coalescence strengthens community stability and elevates diversity.

Mixing of entire microbial communities represents a frequent, yet understudied phenomenon. Here, we mimicked estuarine condition in a microcosm experiment by mixing a freshwater river community with a brackish sea community and assessed the effects of both environmental and community coalescences induced by varying mixing processes on microeukaryotic communities. Signs of shifted community composition of coalesced communities towards the sea parent community suggest asymmetrical community coalescence outcome, which, in addition, was generally less impacted by environmental coalescence. Community stability, inferred from community cohesion, differed among river and sea parent communities, and increased following coalescence treatments. Generally, community coalescence increased alpha diversity and promoted competition from the introduction (or emergence) of additional (or rare) species. These competitive interactions in turn had community stabilizing effect as evidenced by the increased proportion of negative cohesion. The fate of microeukaryotes was influenced by mixing ratios and frequencies (i.e. one-time versus repeated coalescence). Namely, diatoms were negatively impacted by coalescence, while fungi, ciliates, and cercozoans were promoted to varying extents, depending on the mixing ratios of the parent communities. Our study suggests that the predictability of coalescence outcomes was greater when the sea parent community dominated the final community, and this predictability was further enhanced when communities collided repeatedly.

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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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