埋藏在湿地土壤中的孔隙水微生物群:与水文过程相关的水化学和氧化还原梯度的协同效应

IF 2.8 2区 生物学 Q2 ECOLOGY Freshwater Biology Pub Date : 2024-04-28 DOI:10.1111/fwb.14253
Jinjun Kan, Olesya Lazareva, Diana Oviedo-Vargas, Sean M. McAllister, Clara S. Chan
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引用次数: 0

摘要

间隙水或孔隙水占据了土壤颗粒之间的空间,为洪泛区土壤中的微生物活动提供了 "热点 "和 "流体网络"。然而,迄今为止,我们对生活在孔隙水中的微生物及其如何应对环境变化知之甚少。本研究旨在了解河岸孔隙水中的微生物分布和组合,以及它们如何对与水文过程相关的水化学和氧化还原梯度做出反应。我们分析了白泥溪东西两岸孔隙水微生物群落的年度变化,白泥溪是美国宾夕法尼亚州克里斯蒂娜河流域-临界区观测站的一个观测点。微生物丰度通过外荧光显微镜进行量化,群落结构的详细特征通过高通量测序进行分析。此外,还对水化学和氧化还原梯度进行了监测和记录,并利用相关性和多元分析方法分析了它们与孔隙水微生物群的相互作用。微生物细胞的丰度在夏季和秋末有所增加。湿地孔隙水微生物群主要包括酸细菌、类杆菌、硝化细菌和蛋白质细菌,微生物群结构与下层透水砾石层的微生物群结构很容易区分。东西两块湿地的细菌群落结构的季节动态是不同的,与洪泛区地形和相关的水文/地球化学过程有关。铁(Fe)循环细菌(主要是高良姜科(Gallionellaceae)和红豆杉属(Rhodoferax spp.))在孔隙水微生物群落中占主导地位,其相对丰度在东部湿地明显高于西部湿地。此外,在东部湿地,铁氧化细菌(Gallionellaceae)与铁还原细菌(Rhodoferax spp.)呈负相关。各河岸孔隙水中的微生物丰度(细胞密度)呈现出相似的季节性模式,但微生物群落结构却不尽相同。孔隙水中的微生物群集与水化学和氧化还原梯度相关,主要与当地水文过程有关。河岸孔隙水中的微生物群落和相关的微生物活动对陆生-水生界面的碳(C)矿化和铁还原具有重要意义,因此在碳和矿物质动力学中发挥着至关重要的作用。这些发现将为今后研究淡水生态系统对受全球气候变化影响的水文动态的响应提供信息。
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Porewater microbiomes in buried wetland soils: Synergic effects of water chemistry and redox gradients associated with hydrological processes

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来源期刊
Freshwater Biology
Freshwater Biology 生物-海洋与淡水生物学
CiteScore
5.90
自引率
3.70%
发文量
162
审稿时长
2 months
期刊介绍: Freshwater Biology publishes papers on all aspects of the ecology of inland waters, including rivers and lakes, ground waters, flood plains and other freshwater wetlands. We include studies of micro-organisms, algae, macrophytes, invertebrates, fish and other vertebrates, as well as those concerning whole systems and related physical and chemical aspects of the environment, provided that they have clear biological relevance. Studies may focus at any level in the ecological hierarchy from physiological ecology and animal behaviour, through population dynamics and evolutionary genetics, to community interactions, biogeography and ecosystem functioning. They may also be at any scale: from microhabitat to landscape, and continental to global. Preference is given to research, whether meta-analytical, experimental, theoretical or descriptive, highlighting causal (ecological) mechanisms from which clearly stated hypotheses are derived. Manuscripts with an experimental or conceptual flavour are particularly welcome, as are those or which integrate laboratory and field work, and studies from less well researched areas of the world. Priority is given to submissions that are likely to interest a wide range of readers. We encourage submission of papers well grounded in ecological theory that deal with issues related to the conservation and management of inland waters. Papers interpreting fundamental research in a way that makes clear its applied, strategic or socio-economic relevance are also welcome. Review articles (FRESHWATER BIOLOGY REVIEWS) and discussion papers (OPINION) are also invited: these enable authors to publish high-quality material outside the constraints of standard research papers.
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Cover Image Issue Information - Cover and Ed Board Juvenile coho salmon growth differences track biennial pink salmon spawning patterns Species-specific effects of leaf litter leachate on the aquatic microbial community and the ratio of heterotrophic to autotrophic biomass Forbs from seasonal managed wetlands boost plankton production more than emergent graminoids by supplying novel labile detritus
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