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    Stocks and losses of soil organic carbon from Chinese vegetated coastal habitats.

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    Type
    Article
    Authors
    Fu, Chuancheng cc
    Li, Yuan
    Zeng, Lin
    Zhang, Haibo
    Tu, Chen
    Zhou, Qian
    Xiong, Kuanxu
    Wu, Jiaping
    Duarte, Carlos M. cc
    Christie, Peter cc
    Luo, Yongming cc
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Marine Science Program
    Red Sea Research Center (RSRC)
    Date
    2020-09-27
    Online Publication Date
    2020-09-27
    Print Publication Date
    2021-01
    Embargo End Date
    2021-09-13
    Submitted Date
    2020-02-09
    Permanent link to this record
    http://hdl.handle.net/10754/666294
    
    Metadata
    Show full item record
    Abstract
    Global vegetated coastal habitats (VCHs) represent a large sink for organic carbon (OC) stored within their soils. The regional patterns and causes of spatial variation, however, remain uncertain. The sparsity and regional bias of studies on soil OC stocks from Chinese VCHs have limited the reliable estimation of their capacity as regional and global OC sinks. Here, we use field and published data from 262 sampled soil cores and 181 surface soils to report estimates of soil OC stocks, burial rates and losses of VCHs in China. We find that Chinese mangrove, salt marsh and seagrass habitats have relatively low OC stocks, storing 6.3 ± 0.6, 7.5 ± 0.6, and 1.6 ± 0.6 Tg C (±95% confidence interval) in the top meter of the soil profile with burial rates of 44 ± 17, 159 ± 57, and 6 ± 45 Gg C/year, respectively. The variability in the soil OC stocks is linked to biogeographic factors but is mostly impacted by sedimentary processes and anthropic activities. All habitats have experienced significant losses, resulting in estimated emissions of 94.2-395.4 Tg CO2 e (carbon dioxide equivalent) over the past 70 years. Reversing this trend through conservation and restoration measures has, therefore, great potential in contributing to the mitigation of climate change while providing additional benefits. This assessment, on a national scale from highly sedimentary environments under intensive anthropogenic pressures, provides important insights into blue carbon sink mechanism and sequestration capacities, thus contributing to the synchronous progression of global blue carbon management.
    Citation
    Fu, C., Li, Y., Zeng, L., Zhang, H., Tu, C., Zhou, Q., … Luo, Y. (2020). Stocks and losses of soil organic carbon from Chinese vegetated coastal habitats. Global Change Biology. doi:10.1111/gcb.15348
    Sponsors
    This work was supported by the National Natural Science Foundation of China (no. 41991330, 41701263) and the Key Research Projects of Frontier Science, Chinese Academy of Sciences (no. QYZDJ-SSW-DQC015). We thank Professor Bo Li at Fudan University; Professor Hangqing Fan at Guangxi Mangrove Research Center, Guangxi Academy of Sciences; Professor Chuan Tong at Fujian Normal University; Professor Guo Wang at Fujian A&F University; Professor Qiuying Han at Hainan Tropical Ocean University; Dr. Zhijian Jiang at South Sea Institute of Oceanology, Chinese Academy of Sciences (CAS), and Professor Guangxuan Han at Yantai Institute of Coastal Zone Research, CAS for their assistance in field sampling.
    Publisher
    Wiley
    Journal
    Global change biology
    DOI
    10.1111/gcb.15348
    PubMed ID
    32920909
    Additional Links
    https://onlinelibrary.wiley.com/doi/10.1111/gcb.15348
    ae974a485f413a2113503eed53cd6c53
    10.1111/gcb.15348
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Red Sea Research Center (RSRC); Marine Science Program

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