Succession of bacterial community during microbially driven cyanobacterial organic matter degradation and its relationship to water quality in Taihu Lake, China

IF 1.7 4区环境科学与生态学 Q3 ECOLOGY

Aquatic Ecology Pub Date : 2024-10-30 DOI:10.1007/s10452-024-10152-z

Jing Chen, Yongqiang Zhou, Yunlin Zhang, Quanzhong Guo, Shulan Zhang, Guanghuan Ge

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引用次数: 0

Abstract

Anthropogenic eutrophication continuously degrades aquatic ecosystems and has led to a high frequency of massive cyanobacterial blooms in Taihu Lake since 1980. After bloom-forming cyanobacteria begin to disappear, substantial cyanobacterial scum accumulates and is degraded by microorganisms along the lakeshore. Several studies have revealed that cyanobacterial decomposition alters bacterial composition. However, the differences in responses among free-living and particle-attached bacteria to lake microbial community succession and the transition mechanism from one life strategy to another during cyanobacterial biomass and cyanobacteria-derived dissolved organic matter degradation remain unclear. This study investigated the microbial dynamics of cyanobacterial organic matter degradation over 61 days and revealed that complex interactions between particle-attached bacteria and cyanobacterial organic matter resulted in stage-specific changes in the chemical properties of water and a significant succession of the particle-attached bacterial community structure. As cyanobacteria biomass decayed, partial particle-attached bacteria transitioned into free-living bacteria. Successive free-living and particle-attached bacterial communities play important roles in driving dynamic variations in the chemical properties of water. This study provides new insights into the ecological processes and mechanisms governing the shift in bacterial community assembly between free-living and particle-attached bacteria during the post-bloom period in the Lake Taihu watershed.

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太湖蓝藻有机物降解过程中细菌群落演替及其与水质的关系

自1980年以来，人为富营养化不断破坏水生生态系统，导致太湖蓝藻大量繁殖的频率很高。在形成藻华的蓝藻开始消失后，大量的蓝藻浮渣积聚并被湖边的微生物降解。几项研究表明，蓝藻分解改变细菌组成。然而，在蓝藻生物量和蓝藻衍生的溶解有机物降解过程中，自由生活菌和颗粒附着菌对湖泊微生物群落演替的响应差异以及从一种生命策略到另一种生命策略的过渡机制尚不清楚。本研究研究了61天蓝藻有机物降解的微生物动力学，揭示了颗粒附着细菌与蓝藻有机物之间复杂的相互作用导致了水化学性质的阶段性变化和颗粒附着细菌群落结构的显著演替。随着蓝藻生物量的腐烂，部分附着颗粒的细菌转变为自由生活的细菌。连续的自由生活和颗粒附着的细菌群落在驱动水化学性质的动态变化中起着重要作用。本研究为太湖流域水华后期细菌群落在自由细菌和颗粒附着细菌之间转变的生态过程和机制提供了新的见解。

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来源期刊

Aquatic Ecology 环境科学-海洋与淡水生物学

CiteScore

3.90

自引率

0.00%

发文量

审稿时长

3 months

期刊介绍： Aquatic Ecology publishes timely, peer-reviewed original papers relating to the ecology of fresh, brackish, estuarine and marine environments. Papers on fundamental and applied novel research in both the field and the laboratory, including descriptive or experimental studies, will be included in the journal. Preference will be given to studies that address timely and current topics and are integrative and critical in approach. We discourage papers that describe presence and abundance of aquatic biota in local habitats as well as papers that are pure systematic. The journal provides a forum for the aquatic ecologist - limnologist and oceanologist alike- to discuss ecological issues related to processes and structures at different integration levels from individuals to populations, to communities and entire ecosystems.