中国黄河口湿地沉积物中细菌与几种氧化还原敏感金属(铁、锰、铀)之间的相互作用

IF 2.3 3区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES
Jiahong Xi, Xihuang Zhong, Tong Zhang, Yu Zhen, Li Zou, Xueyan Jiang
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引用次数: 0

摘要

河口湿地具有生物多样性高和氧化还原敏感金属(RSMs)波动活跃的特点。本研究从黄河口湿地(YREW)有植被和无植被的两个地点采集了沉积物样本。采用 Tessier 顺序萃取法提取铁、锰和铀的活性形式,通过高通量测序分析细菌群落,并评估群落对 RSMs 的影响。结果表明,植被枯萎产生的高营养含量对细菌的生物多样性有积极影响,从而导致沉积物中生物量高、种类多。氧化还原条件和营养水平是影响细菌群落结构的主要因素。在还原条件下,Desulfococcus 和 Desulfosarcina 等菌属是介导活性铁和锰还原的主要细菌。这些细菌可能会导致铁、锰和铀从盐沼向近岸区域的释放发生明显变化。我们的研究结果有助于阐明细菌与 RSM 的相互作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Interactions Between Bacteria and Several Redox-Sensitive Metals (Fe, Mn, U) in the Sediments of the Yellow River Estuary Wetland, China

Interactions Between Bacteria and Several Redox-Sensitive Metals (Fe, Mn, U) in the Sediments of the Yellow River Estuary Wetland, China

Estuarine wetlands are characterized by high biodiversity and active fluctuations in redox-sensitive metals (RSMs). In this study, sediment samples were collected from two sites, one with and one without vegetation, in the Yellow River Estuary Wetland (YREW). Active forms of Fe, Mn, and U were extracted using Tessier’s sequential extraction method, the bacterial community was analyzed through high-throughput sequencing, and the impact of the community on the RSMs was evaluated. The results indicated that the high nutrient content generated by vegetation withering had a positive effect on bacterial biodiversity, which led to high biomass and a wide variety of species in the sediments. Redox conditions and nutrient levels were the main factors influencing bacterial community structure. Under reducing conditions, genera such as Desulfococcus and Desulfosarcina were the main bacteria mediating the reduction of active Fe and Mn. Bacteria in genera such as Desulfatiglans and Desulfotomaculum were the main bacteria mediating the reduction of active U. These bacteria may result in obvious changes in the release of Fe, Mn, and U from salt marshes to nearshore regions. Our results can help to elucidate the interactions of bacteria and RSMs.

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来源期刊
Estuaries and Coasts
Estuaries and Coasts 环境科学-海洋与淡水生物学
CiteScore
5.60
自引率
11.10%
发文量
107
审稿时长
12-24 weeks
期刊介绍: Estuaries and Coasts is the journal of the Coastal and Estuarine Research Federation (CERF). Begun in 1977 as Chesapeake Science, the journal has gradually expanded its scope and circulation. Today, the journal publishes scholarly manuscripts on estuarine and near coastal ecosystems at the interface between the land and the sea where there are tidal fluctuations or sea water is diluted by fresh water. The interface is broadly defined to include estuaries and nearshore coastal waters including lagoons, wetlands, tidal fresh water, shores and beaches, but not the continental shelf. The journal covers research on physical, chemical, geological or biological processes, as well as applications to management of estuaries and coasts. The journal publishes original research findings, reviews and perspectives, techniques, comments, and management applications. Estuaries and Coasts will consider properly carried out studies that present inconclusive findings or document a failed replication of previously published work. Submissions that are primarily descriptive, strongly place-based, or only report on development of models or new methods without detailing their applications fall outside the scope of the journal.
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