The Relationships Between the Free-Living and Particle-Attached Bacterial Communities in Response to Elevated Eutrophication
The Relationships Between the Free-Living and Particle-Attached Bacterial Communities in Response to Elevated Eutrophication
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自由生活和颗粒附着细菌群落对富营养化程度升高的反应之间的关系
DOI：
10.3389/fmicb.2020.00423
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发表时间：
2020-03-25
影响因子：
5.2
通讯作者：
Gao, Guang
中科院分区：
文献类型：
--
作者：
Hu, Yang;Xie, Guijuan;Gao, Guang
探索自由生活（FL）和颗粒附着（PA）细菌群落之间的关系可以深入了解它们的连通性和生物地球化学过程的划分，这对于理解水生生态系统中的元素循环和代谢途径至关重要。然而，关于 FL 和 PA 分数是否具有相同的组合仍存在激烈争论。为了解决这个问题，我们研究了中国五里湖环境梯度上 FL 和 PA 细菌群落的相似程度。结果显示，五里湖西湖为轻度富营养化，东湖为中度和高度富营养化。西湖FL细菌群落的α多样性显着低于PA部分，而东湖两个部分的α多样性相当。西湖两个群落的β多样性差异显着，而东湖则相似。此外，功能预测分析表明，西湖FL和PA组分的代谢功能差异显着大于东湖。悬浮颗粒和碳资源促进了 FL 和 PA 部分之间的相似性。总的来说，我们的结果揭示了沿着富营养化梯度的水生群落的趋同演替，强调 FL 和 PA 细菌群落之间的连通性与营养相关。
Exploring the relationships between free-living (FL) and particle-attached (PA) bacterial communities can provide insight into their connectivity and the partitioning of biogeochemical processes, which is crucial to understanding the elemental cycles and metabolic pathways in aquatic ecosystems. However, there is still intense debate about that whether FL and PA fractions have the same assemblage. To address this issue, we investigated the extent of similarity between FL and PA bacterial communities along the environmental gradients in Lake Wuli, China. Our results revealed that the west Lake Wuli was slightly eutrophic and the east lake was moderately and highly eutrophic. The alpha-diversity of the FL bacterial communities was significantly lower than that of the PA fraction in the west lake, whereas the alpha-diversity of the two fractions was comparable in the east lake. The beta-diversity of both communities significantly differed in the west lake, whereas it resembled that in the east lake. Moreover, functional prediction analysis highlighted the significantly larger differences of metabolic functions between the FL and PA fractions in the west lake than in the east lake. Suspended particles and carbon resource promote the similarity between the FL and PA fractions. Collectively, our result reveals a convergent succession of aquatic communities along the eutrophic gradient, highlighting that the connectivity between FL and PA bacterial communities is nutrient related.