Microbial degradation of various types of dissolved organic matter in aquatic ecosystems and its influencing factors
Microbial degradation of various types of dissolved organic matter in aquatic ecosystems and its influencing factors
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水生生态系统中各类溶解性有机物的微生物降解及其影响因素
DOI：
10.1007/s11430-021-9996-1
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
and Y. Yamashita
中科院分区：
文献类型：
--
作者：
Chen;M.;J. Hur;J.-D. Gu;and Y. Yamashita
化学多样性溶解有机物（DOM）和生物多样性微生物之间的相互作用是由无数的内在和外在的因素，这些因素还没有得到很好的理解。在这里，我们全面更新和弥合这一跨学科主题的差距。在生态系统水平上，由藻类来源的DOM主导的水生生态系统（例如，富营养化湖泊或沿海上升流区）含有更多的生物不稳定DOM，如可直接同化的单体和易于水解的生物聚合物。然而，其他生态系统主要依靠土壤和维管植物的DOM供应（例如，河流或湿地）具有更多生物难降解DOM，例如脂肪族C骨架和地质聚合物的低分子量（LMW）残留物。各种异养细菌，古生菌，真菌，噬营养原生生物，甚至光合自养浮游植物显示能够处理不同类型的有机物的基因组和/或培养实验证据。各种可生物降解的有机物具有不同的化学结构和化学键，例如碳水化合物、氨基酸、蛋白质、木质素、脂质、羧酸、腐殖酸、烃和纳米塑料。同时，代谢中间体和/或生物难降解有机物（例如，尽管在生物测定实验期间大量溶解的有机碳（DOC）普遍衰减，但观察到富含羧基的脂环分子（CRAM）。特别是，新出现的证据表明，古细菌对海洋中层和次表层环境的生物量贡献很大，其丰度往往随着沉积物的深度而增加。此外，不仅内在因素（例如，DOM组成和结构），但也包括外部因素（例如，阳光和溶解氧）在DOM和微生物之间的相互作用中起重要作用。
Interactions between chemodiverse dissolved organic matter (DOM) and biodiverse microbes are governed by a myriad of intrinsic and extrinsic factors which are not well understood. Here, we update and bridge the gap of this interdisciplinary theme comprehensively. At an ecosystem level, aquatic ecosystems dominated by algae-sourced DOM (e.g., eutrophic lake or coastal upwelling areas) harbor more biolabile DOM, such as directly assimilable monomers and readily hydrolysable biopolymers. However, other ecosystems prevailed by DOM supply from soil and vascular plants (e.g., river or wetland) have more biorefractory DOM, such as low molecular weight (LMW) residue of aliphatic C skeletons and geopolymers. A variety of heterotrophic bacteria, archaea, fungi, phagotrophic protists, and even photoautotrophic phytoplankton shows genomic and/or culturing experimental evidence of being able to process a diverse type of organics. The various biodegradable organics have different chemical structures and chemical bonds such as carbohydrates, amino acids, proteins, lignins, lipids, carboxylic acids, humic acids, hydrocarbons, and nanoplastics. Meanwhile, bio-production of metabolism intermediates and/or biorefractory organics (e.g., carboxyl-rich alicyclic molecules, CRAM) is observed despite general decay of bulk dissolved organic carbon (DOC) during bioassay experiments. In particular, emerging evidence shows that archaea contribute significantly to biomass in the marine mesopelagic zone and subsurface environments and their abundance often increases with depth in sediments. Furthermore, not only intrinsic factors (e.g., DOM composition and structure), but also extrinsic ones (e.g., sunlight and dissolved oxygen) play important roles in interplays between DOM and microbes.
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DOI：
--
发表时间：
2019
期刊：
Coastal Wetlands
影响因子：
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作者：
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DOI：
--
发表时间：
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作者：
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作者：
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Beatriz E. Noriega‐Ortega;G. Wienhausen;A. Mentges;T. Dittmar;M. Simon;J. Niggemann
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DOI：
10.1073/pnas.95.12.6578
发表时间：
1998-06-09
影响因子：
11.1
作者：
Whitman, WB;Coleman, DC;Wiebe, WJ
通讯作者：
Wiebe, WJ