文献类型：期刊文献

英文题名：Mangrove vegetation enhances soil carbon storage primarily through in situ inputs rather than increasing allochthonous sediments

作者：Xiong, Yanmei[1] Liao, Baowen[1] Wang, Faming[2]

第一作者：熊燕梅

通信作者：Xiong, YM[1]

机构：[1]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Guangdong, Peoples R China;[2]Chinese Acad Sci, South China Bot Garden, Key Lab Vegetat Restorat & Management Degraded Ec, Guangzhou 510650, Guangdong, Peoples R China

年份：2018

卷号：131

起止页码：378-385

外文期刊名：MARINE POLLUTION BULLETIN

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000437060300045)】；

基金：We thank Dr. Catherine Lovelock for constructive comments on our study during the preparation of the manuscript. Our sincere thanks are also extended to Mr. Dennis Sargent for assistance with editing. The study was funded by the National Natural Science Foundation of China (grant numbers 41776103), the Guangdong Forestry Department of China (grant numbers 2014KJCX021-02 and 2017KJCX017) and the Chinese Academy of Forestry (grant number RITFYWZX2015-03).

语种：英文

外文关键词：Blue carbon; Carbon sequestration; Coastal wetland; Soil carbon source; Sediment; Stable isotope

摘要：The role of soil carbon (C) in coastal wetlands as a net sink is related to the relative abundance of autochthonous versus allochthonous C. We aimed to investigate soil C sources and the pathways by which mangrove vegetation enhances soil C accumulation. We sampled soil to 1 m depth in seven oceanic mangrove forests and an adjacent un-vegetated mudflat at Dongzhai Bay, China. Stable C isotope technique was used to separate autochthonous and allochthonous C sources. Autochthonous C accounted for 27-97% of soil C stock in the top meter. Soil C density was 1.1-3.6 times higher in mangroves than in the mudflat. Among the increased soil C in mangroves relative to mudflat, autochthonous C accounted for 65-100% of the increments. The results suggest that mangrove vegetation enhances soil C storage primarily through in situ inputs, therefore the substantial soil C stocks commonly found in mangroves play an important role in sequestering atmospheric CO2.