Earth Science Frontiers ›› 2022, Vol. 29 ›› Issue (2): 327-342.DOI: 10.13745/j.esf.sf.2021.10.35

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Application of biomarkers in reconstructing marine and lacustrine paleoecosystems and paleoproductivity: A review

LING Yuan1,2(), WANG Yong1, WANG Shuxian3,*(), SUN Qing3, LI Haibing1,2   

  1. 1. Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China
    2. Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
    3. National Research Center for Geoanalysis, Beijing 100037, China
  • Received:2021-09-06 Revised:2021-11-05 Online:2022-03-25 Published:2022-03-31
  • Contact: WANG Shuxian

Abstract:

Oceans and lakes have profound regulatory effects on climate, environment and ecosystems. Understanding the composition, structure and evolution of marine and lake biomes of ecosystems in different geological periods can provide a scientific basis for solving the current environmental problems and assessing sustainable development. Biomarkers enable us to study the evolution of various organisms at the molecular level due to their biological specificity. This paper summarizes the characteristics and sources of biomarkers (alkanes, acids, alcohols, ketones, esters, steroids, hopanoids, terpenes and glycerol tetraethers, etc.) in marine and lacustrine ecosystems. Biomarkers derived from terrestrial higher plants include long-chain alkanes, fatty acids, fatty alcohols, lignin, terpenes, etc., while derived from aquatic microalgae they include long-chain alkenones, alkyl diols, highly-branched isoprenoids (HBIs), etc. Biomarkers of microbial origin include bacteriohopanepolyols (BHPs), heterocyst glycolipids, branched alkanes, etc. In the future, biomarker analysis using compound-specific isotopes, combined with modern molecular biology studies, such as genomics and proteomics, ecological research on biological species corresponding to different biomarkers, and studying ancient and modern ecology jointly can provide a new feasible way for researching the molecular sources for certain biomarkers. This paper also rivews the application of biomarker indices in reconstructing the composition, structure, productivity and nutritional status of marine and lake ecosystems. Future research tends to shift from qualitative to quantitative reconstruction. More and more mature indices applied in oceans will be used in lacustrine environment. In addition, the combination of multiple indices will improve the reliability of reconstructing paleoecosystem.

Key words: biomarkers, paleoecology, paleoproductivity, ocean, lake

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