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

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

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  • NSTL
  • Wiley
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 CO(2)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.

blue carboncarbon burialcarbon losscarbon stockclimate changesequestration potentialsoil organic carbon

Fu, Chuancheng、Li, Yuan、Zeng, Lin、Zhang, Haibo、Tu, Chen、Zhou, Qian、Xiong, Kuanxu、Wu, Jiaping、Duarte, Carlos M.、Christie, Peter、Luo, Yongming

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Chinese Acad Sci, Inst Soil Sci, CAS Key Lab Soil Environm & Pollut Remediat, Nanjing, Peoples R China

Chinese Acad Sci, Yantai Inst Coastal Zone Res, CAS Key Lab Coastal Environm Proc & Ecol Remediat, Yantai, Peoples R China

Ludong Univ, Sch Resources & Environm Engn, Yantai, Peoples R China

Zhejiang A& F Univ, Key Lab Soil Contaminat Bioremediat Zhejiang Prov, Sch Environm & Resource Sci, Hangzhou, Peoples R China

Zhejiang Univ, Ocean Coll, Zhoushan, Peoples R China

King Abdullah Univ Sci & Technol KAUST, Biol & Environm Sci & Engn Div BESE, Red Sea Res Ctr RSRC, Thuwal, Saudi Arabia

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2021

10.1111/gcb.15348

Global change biology

Global change biology

SCI
ISSN：1354-1013
年,卷(期)：2021.27(1)
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