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Archives of short-term fluid flow dynamics and possible influence of human activities at methane seeps: Evidence from high-resolution element geochemistry of chemosynthetic bivalve shells
Shanghai Engineering Research Center of Hadal Science and Technology, College of Marine Sciences, Shanghai Ocean University, Shanghai, China.
Shanghai Engineering Research Center of Hadal Science and Technology, College of Marine Sciences, Shanghai Ocean University, Shanghai, China.
Swedish Museum of Natural History, Department of Paleobiology. Department of Palaeobiology Swedish Museum of Natural History Stockholm Sweden;Bolin Centre for Climate Research Stockholm University Stockholm Sweden.ORCID iD: 0000-0001-6281-100X
Shanghai Engineering Research Center of Hadal Science and Technology, College of Marine Sciences, Shanghai Ocean University, Shanghai, China.
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2022 (English)In: Frontiers in Marine Science, E-ISSN 2296-7745, E-ISSN 2296-7745, Vol. 9, article id 960338Article in journal (Refereed) Published
Abstract [en]

The natural dynamics of fluid flow at methane seeps and increasingly human activities influence the biogeochemistry of the microenvironment and further determine the activity of the chemosynthetic communities within these ecosystems. However, ways to reconstruct short-term fluid flow dynamics and to decipher the influence of scientific exploration at seeps are limited. In this study, we present high-resolution trace elements/Ca ratios (Li/Ca, Mg/Ca, Ti/Ca, Mn/Ca, Co/Ca, Cu/Ca, Zn/Ca, Sr/Ca, Zr/Ca, Mo/Ca, Ba/Ca, Th/Ca and U/Ca ratios) from the shells of two species of chemosymbiotic bivalves (the thiotrophic vesicomyid clam Archivesica marissinica and the methanotrophic mussel Gigantidas haimaensis) from the Haima cold seeps of the South China Sea. We found that the complex distribution patterns of some trace elements (Mg/Ca, Sr/Ca, Mo/Ca and U/Ca ratios) in G. haimaensis are largely controlled by mineral composition or age. The observation of Co/Ca and Ba/Ca ratios in both species indicate strong physiological and environmental control on the incorporation of trace elements during the biomineralization process. Besides, the distribution patterns of other trace elements provide information that can be used to discuss open issues such as the loss of trace elements after death of the bivalves, and the possible influence of human activities such as sediment disturbance. Overall, this study emphasizes the potential for using high-resolution element geochemistry of seep bivalve shells to reveal the physiological and environmental factors that control the growth of bivalves, and to elucidate the potential history of fluid discharge at cold seeps.

Place, publisher, year, edition, pages
2022. Vol. 9, article id 960338
Keywords [en]
Bivalvia, methane seeps, geochemistry
National Category
Environmental Sciences Other Earth and Related Environmental Sciences
Research subject
The changing Earth
Identifiers
URN: urn:nbn:se:nrm:diva-4868DOI: 10.3389/fmars.2022.960338OAI: oai:DiVA.org:nrm-4868DiVA, id: diva2:1713918
Note

This study was partially sponsored by the National Natural Science Foundation of China (Grants: 41730528, 42106059, 42225603), Shanghai Sailing Program (Grant: 21YF1416800), special funding for the development of science and technology of Shanghai Ocean University and startup foundation for young teachers of Shanghai Ocean University.

Available from: 2022-11-28 Created: 2022-11-28 Last updated: 2023-01-10Bibliographically approved

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Publisher's full texthttps://www.frontiersin.org/articles/10.3389/fmars.2022.960338/full

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