生物稳定:微生物与硅质海洋沉积物之间相互作用的参数化

IF 10.8 1区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY
Brette S. Harris, Kelly J. Rozanitis, Bruce Sutherland, Paul G. Myers, Kurt O. Konhauser, Murray K. Gingras
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引用次数: 0

摘要

在地球历史的大部分时间里,微生物垫一直存在。它们代表了生命最早的证据,在生物地球化学循环中至关重要,并在为大气充氧方面发挥着关键作用。此外,底栖微生物群通过增强底质的内聚力和稳定性来影响沉积物的性质,这一过程被称为 "生物稳定化",会影响沉积物的动力学和流变学。大量研究都集中在通过实验量化硅质沉积物中的生物稳定性。本综述对这些研究进行了汇编和综合,以便于对结果进行比较。这些研究结果又与以下方面进行了比较:(1) 希尔兹图,(2) 浅海环境中的剪应力值,(3) 海洋地层记录中出现的微生物诱导沉积结构。研究结果揭示了结果的巨大差异,希尔兹参数的增加幅度从 0.1 个数量级到 4 个数量级不等。研究还表明,高能流体动力条件(如风浪基底以上的条件)会抑制微生物的定殖。此外,综述还简要讨论了数据的两个应用领域:(1) 完善大氧化事件的模型,(2) 评估微生物生物稳定对气候变化引起的海岸侵蚀加剧的响应。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Biostabilization: Parameterizing the interactions between microorganisms and siliciclastic marine sediments
Microbial mats have existed for much of Earth's history. They represent some of the earliest evidence of life, are essential in biogeochemical cycles, and played a pivotal role in oxygenating the atmosphere. In addition, benthic microbiota impact sediment properties by enhancing the cohesion and stability of the substratum, a process known as ‘biostabilization’, which affects sediment dynamics and rheology. A substantial body of research has focused on experimentally quantifying biostabilization in siliciclastic sediments. This review compiles and synthesizes these studies in order to facilitate comparison of results. They, in turn, are compared with; (1) the Shields' diagram, (2) shear stress values in shallow marine environments, and (3) occurrences of microbially induced sedimentary structures in the marine stratigraphic record. The findings reveal significant variability in outcomes, with increases in the Shields' Parameter ranging from 0.1 to 4 orders of magnitude. They also demonstrate that high-energy hydrodynamic conditions, such as those above fairweather wave base, inhibit microbial colonization. Additionally, the review briefly discusses two applications of the data: (1) refining models of the Great Oxidation Event, and (2) evaluating microbial biostabilization as a response to increased coastal erosion driven by climate change.
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来源期刊
Earth-Science Reviews
Earth-Science Reviews 地学-地球科学综合
CiteScore
21.70
自引率
5.80%
发文量
294
审稿时长
15.1 weeks
期刊介绍: Covering a much wider field than the usual specialist journals, Earth Science Reviews publishes review articles dealing with all aspects of Earth Sciences, and is an important vehicle for allowing readers to see their particular interest related to the Earth Sciences as a whole.
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