Soil carbon storage in mangroves is primarily controlled by soil properties: A study at Dongzhai Bay, China

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	Soil carbon storage in mangroves is primarily controlled by soil properties: A study at Dongzhai Bay, China
	Xiong, YM; Liao, BW; Proffitt, E; Guan, W; Sun, YX; Wang, FM; Liu, X; xiongym@ritf.ac.cn
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2018
卷号	619 页码:1226-1235
英文摘要	Coastal wetlands are well known for their considerable capacity to store carbon (C). However, the spatial patterns and major controls of soil C concentration and C density in coastal wetlands remain poorly known. We measured soil total C concentration up to one meter depth and assessed environmental and biological factors influencing soil C input and decomposition processes across various geomorphologic settings and mangrove forest types at Dongzhai Bay, China. Structural equation modeling (SEM) was used to determine the causal pathways of influencing factors on soil C concentration. We found that the variation pattern of soil C concentration across geomorphologic settings and forest types was mirrored by soil properties. From 68 to 94% (varying with soil depth) variations of soil C concentration were explained by the inter-related influencing factors included in SEM. In the upper 60 cm soil layers, soil moisture was the most important factor affecting soil C concentration. In the 60-100 cm subsoil zone, the proportion of finer soil particles was the primary control of soil C concentration variation. In contrast, aboveground biomass and nearness of sampling site to the open water, which affect autochthonous and allochthonous C inputs, had relatively weak effects on soil C concentration compared to soil properties, which affect C decomposition. Soil C concentration was a good predictor of soil C density at all soil depths. The results suggest that top-and subsoil C concentrations in mangroves are subjected to different environmental controls, but taken together, mangrove soil C storage may be primarily controlled by soil property-mediated C decomposition rate. Subsoil C deserves more attention since it may respond differently to environmental changes than the better-known topsoil C. (c) 2017 Published by Elsevier B.V.
学科主题	Environmental Sciences & Ecology
资助项目	LMB
WOS关键词	Blue carbon ; Coastal wetlands ; Carbon stock ; Subsoil carbon ; Soil carbon decomposition ; Sediment
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/16981]
专题	南海海洋研究所_中科院海洋生物资源可持续利用重点实验室
通讯作者	xiongym@ritf.ac.cn
推荐引用方式 GB/T 7714	Xiong, YM,Liao, BW,Proffitt, E,et al. Soil carbon storage in mangroves is primarily controlled by soil properties: A study at Dongzhai Bay, China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,619:1226-1235.
APA	Xiong, YM.,Liao, BW.,Proffitt, E.,Guan, W.,Sun, YX.,...&xiongym@ritf.ac.cn.(2018).Soil carbon storage in mangroves is primarily controlled by soil properties: A study at Dongzhai Bay, China.SCIENCE OF THE TOTAL ENVIRONMENT,619,1226-1235.
MLA	Xiong, YM,et al."Soil carbon storage in mangroves is primarily controlled by soil properties: A study at Dongzhai Bay, China".SCIENCE OF THE TOTAL ENVIRONMENT 619(2018):1226-1235.