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Advances in Earth Science >

2022 , Vol. 37 >Issue 4: 370 - 381

DOI: https://doi.org/10.11867/j.issn.1001-8166.2021.110

Distribution and Biotransformation of Ethane and Propane in Marine Environments

  • Yuan YUAN ,
  • Guangchao ZHUANG ,
  • Shihai MAO ,
  • Jiarui LIU ,
  • Xiting LIU ,
  • Guipeng YANG
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  • 1.Frontiers Science Center for Deep Ocean Multispheres and Earth System，and Key Laboratory of Marine Chemistry Theory and Technology，Ministry of Education，Ocean University of China，Qingdao 266100，China
    2.Marine Ecology and Environmental Science Laboratory，Pilot National Laboratory for Marine Science and Technology，Qingdao 266237，China
    3.College of Chemistry and Chemical Engineering，Ocean University of China，Qingdao 266100，China
    4.Department of Earth，Planetary and Space Sciences，University of California，Los Angeles，CA，USA 9009
    5.College of Marine Geosciences，Ocean University of China，Qingdao 266100，China
YUAN Yuan (1996-), female, Jiujiang City, Jiangxi Province, Master student. Research areas include marine biogeochemistry. E-mail: yuanyuan3305@stu.ouc.edu.cn
ZHUANG Guangchao (1985-), male, Rizhao City, Shandong Province, Professor. Research areas include marine biogeochemistry and geomicrobiology. E-mail: zgc@ouc.edu.cn

Received date: 2021-09-15

  Revised date: 2021-11-10

  Online published: 2022-04-28

Supported by

the National Natural Science Foundation of China "Metabolic pathways of methane and other low molecular weight compounds in hydrothermally altered subseafloor sediments from the Guaymas Basin"(42076031);The Taishan Scholar Project of Shandong Province(tsqn201909057)

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Abstract

Marine sediments contain large amounts of alkanes， mainly consisting of methane （CH4）， ethane （C2H6）， and propane （C3H6）. Similar to methane， ethane and propane are also important greenhouse gases. The decomposition of hydrates and oil/gas seeps can cause the release of ethane and propane into seawater and the atmosphere， significantly impacting the marine ecosystems and global climate change. The microbial oxidation of alkanes， in marine environments， effectively reduces the emission flux of these gases. The latest research progresses on the distribution and biotransformation of ethane and propane in marine environment were reviewed with the following highlights： ① The distribution of ethane and propane in seawater exhibited clear patterns， which are largely influenced by hydrological， chemical， and biological factors； ② Biological sources of ethane and propane in marine environments include phytoplankton production in seawater and anaerobic production by microorganisms in sediments. Methanogens can produce ethane and propane using a variety of substrates， and ③ aerobic oxidation of ethane to propane is performed by hydrocarbon-degrading bacteria， and this process is accompanied by carbon and hydrogen isotope fractionation. ④ Anaerobic oxidation of ethane and propane in sediments is usually coupled with sulfate reduction. Sulfate-reducing bacteria can oxidize ethane and propane， and a possible mechanism for this process has been proposed. This review summarizes the source， distribution， and microbial metabolism of ethane and propane in marine environments and provides a scientific basis for further understanding the biogeochemical cycle of hydrocarbons.

Key words： Ethane; Propane; Microorganism; Biogeochemical cycle; Marine sediment

Cite this article

Yuan YUAN , Guangchao ZHUANG , Shihai MAO , Jiarui LIU , Xiting LIU , Guipeng YANG . Distribution and Biotransformation of Ethane and Propane in Marine Environments[J]. Advances in Earth Science, 2022 , 37(4) : 370 -381 . DOI: 10.11867/j.issn.1001-8166.2021.110

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