当前位置：
X-MOL 学术
›
Environ. Res.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Impacts of oxbow lake evolution on sediment microbial community structure in the Yellow River source region
Environmental Research ( IF 7.7 ) Pub Date : 2024-04-30 , DOI: 10.1016/j.envres.2024.119042 Huinan Li 1 , Shimin Tian 2 , Fude Shang 1 , Xiaoyu Shi 3 , Yang Zhang 2 , Yongtao Cao 2
Environmental Research ( IF 7.7 ) Pub Date : 2024-04-30 , DOI: 10.1016/j.envres.2024.119042 Huinan Li 1 , Shimin Tian 2 , Fude Shang 1 , Xiaoyu Shi 3 , Yang Zhang 2 , Yongtao Cao 2
Affiliation
|
Oxbow lake formation and evolution have significant impacts on the fragile Yellow River Basin ecosystem. However, the effects of different oxbow lake evolutionary stages on sediment microbial community structure are not yet understood comprehensively. Therefore, microbial community structure in three stages of oxbow lake succession, namely, lotic lake (early stage), semi-lotic lake (middle stage), and lentic lake (late stage), was investigated in the present study in the Yellow River Basin on the Qinghai-Tibet Plateau. Amplicon sequencing was employed to reveal differences in microbial community diversity and composition. The bacterial and fungal communities in sediment were significantly different among the three succession stages and were driven by different environmental factors. In particular, bacterial community structure was influenced primarily by nitrate-nitrogen (N), microbial biomass phosphorus, and total carbon (C) and organic C in the early, middle, and late stages, respectively. Conversely, fungal community structure was influenced primarily by ammonium-N in the early stage and by moisture content in the middle and late stages. However, the predicted functions of the microbial communities did not exhibit significant differences across the three succession stages. Both bacteria and fungi were influenced significantly by stochastic factors. Homogeneous selection had a high relative contribution to bacteria community assembly in the middle stage, whereas the relative contributions of heterogeneous selection processes to fungal community assembly increased through the three stages. As succession time increased, the total number of keystone species increased gradually, and the late succession stage had high network complexity and the highest network stability. The findings could facilitate further elucidation of the evolution mechanisms of oxbow lake source area, high-altitude river evolution dynamics, in addition to aiding a deeper understanding of the long-term ecological evolution patterns of source river ecosystems.
中文翻译：
牛轭湖演化对黄河源区沉积物微生物群落结构的影响
牛轭湖的形成和演化对脆弱的黄河流域生态系统产生重大影响。然而，不同牛轭湖演化阶段对沉积物微生物群落结构的影响尚未得到全面了解。因此，本研究对黄河流域牛轭湖演替过程中流域湖（早期）、半流域湖（中期）和静域湖（晚期）三个阶段的微生物群落结构进行了调查。在青藏高原上。采用扩增子测序来揭示微生物群落多样性和组成的差异。沉积物中的细菌和真菌群落在三个演替阶段之间存在显着差异，并且受到不同环境因素的驱动。特别是，细菌群落结构在早期、中期和晚期分别主要受到硝态氮（N）、微生物量磷、总碳（C）和有机碳的影响。相反，真菌群落结构前期主要受铵态氮影响，中后期主要受水分含量影响。然而，微生物群落的预测功能在三个演替阶段并未表现出显着差异。细菌和真菌都受到随机因素的显着影响。在中期阶段，同质选择对细菌群落组装的相对贡献较高，而异质选择过程对真菌群落组装的相对贡献在三个阶段中不断增加。随着演替时间的延长，关键物种总数逐渐增加，演替后期网络复杂度高，网络稳定性最高。 该研究结果有助于进一步阐明牛轭湖源区的演化机制、高海拔河流的演化动力学，有助于更深入地了解源头河流生态系统的长期生态演化格局。
更新日期：2024-04-30
中文翻译：
牛轭湖演化对黄河源区沉积物微生物群落结构的影响
牛轭湖的形成和演化对脆弱的黄河流域生态系统产生重大影响。然而，不同牛轭湖演化阶段对沉积物微生物群落结构的影响尚未得到全面了解。因此，本研究对黄河流域牛轭湖演替过程中流域湖（早期）、半流域湖（中期）和静域湖（晚期）三个阶段的微生物群落结构进行了调查。在青藏高原上。采用扩增子测序来揭示微生物群落多样性和组成的差异。沉积物中的细菌和真菌群落在三个演替阶段之间存在显着差异，并且受到不同环境因素的驱动。特别是，细菌群落结构在早期、中期和晚期分别主要受到硝态氮（N）、微生物量磷、总碳（C）和有机碳的影响。相反，真菌群落结构前期主要受铵态氮影响，中后期主要受水分含量影响。然而，微生物群落的预测功能在三个演替阶段并未表现出显着差异。细菌和真菌都受到随机因素的显着影响。在中期阶段，同质选择对细菌群落组装的相对贡献较高，而异质选择过程对真菌群落组装的相对贡献在三个阶段中不断增加。随着演替时间的延长，关键物种总数逐渐增加，演替后期网络复杂度高，网络稳定性最高。 该研究结果有助于进一步阐明牛轭湖源区的演化机制、高海拔河流的演化动力学，有助于更深入地了解源头河流生态系统的长期生态演化格局。
京公网安备 11010802027423号