The eco-environmental changes in China coastal seas elucidated from isotope tracers

Chen Min; Zeng Jian; Yang Weifeng

doi:10.3969/j.issn.0253-4193.2018.10.004

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Chen Min, Zeng Jian, Yang Weifeng. The eco-environmental changes in China coastal seas elucidated from isotope tracers[J]. Haiyang Xuebao, 2018, 40(10): 32-41. doi: 10.3969/j.issn.0253-4193.2018.10.004

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Chen Min, Zeng Jian, Yang Weifeng. The eco-environmental changes in China coastal seas elucidated from isotope tracers[J]. Haiyang Xuebao, 2018, 40(10): 32-41. doi: 10.3969/j.issn.0253-4193.2018.10.004

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The eco-environmental changes in China coastal seas elucidated from isotope tracers

doi: 10.3969/j.issn.0253-4193.2018.10.004

College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China

Received Date: 2018-05-29
Rev Recd Date: 2018-06-14

Abstract

Abstract

Isotopes are unique in determining the source of material, indicating the path of biogeochemical cycle, and quantifying the rate of biogeochemical processes in marine environments. In this paper, stable isotopes (¹³C, ¹⁵N, ¹⁸O) and radionuclides (¹⁴C, ²³⁴Th, ²³²Th, ²³⁰Th, ²²⁸Th, ²¹⁰Po, ²¹⁰Pb, ¹³⁷Cs, ²²⁶Ra, ²²⁸Ra, ²²⁴Ra, ²²³Ra) commonly used in coastal eco-environmental studies were targeted to reveal the source of marine organic matter, structure of food web, mechanism of coastal hypoxia, nitrogen cyclic processes, particle dynamics, submarine groundwater input, organic geochemical processes, sedimentary chronology, etc. We focused on summarizing recent progresses of their applications in the study of China coastal seas. With the start and development of economy, the eco-environments of China coastal seas have undergone significant changes in the past one hundred years. The evolution of eutrophication and sedimentary dynamics revealed by isotopes indicated that the eco-environment of China coastal seas has experienced persistent changes since the 1950s. Especially in the past 20-30 years, the changes have been dramatic, reflecting that human activities are the main driving force for the changes. In the future, it is need to study the response characteristics, variation rates and mechanisms of coastal eco-environmental changes through the development of new isotope techniques and their widely applications. In this way, we will be able to systematically grasp the temporal and spatial changes of the coastal ecosystem.
- China costal seas,
- historical change,
- isotope

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