Changes to soil organic matter decomposition rate and its temperature sensitivity along water table gradients in cold-temperate forest swamps

doi:10.1016/j.catena.2020.104684

	Changes to soil organic matter decomposition rate and its temperature sensitivity along water table gradients in cold-temperate forest swamps
	Bian, Hongfeng 1; Zheng, Shuai 1; Liu, Yuan 2; Xu, Li 2; Chen, Zhi 2; He, Nianpeng 2,3,4,5
刊名	CATENA
	2020-11-01
卷号	194 页码:9
关键词	Forest Swamp Water table Soil organic matter Decomposition Temperature sensitivity
ISSN号	0341-8162
DOI	10.1016/j.catena.2020.104684
通讯作者	Xu, Li(xuli@igsnrr.ac.cn)
英文摘要	High-latitude forest swamp soil stores a large amount of carbon (C), because of its anaerobic condition and lower temperature. The combination of decreasing water table by artificial drainage and climate warming exert a considerable influence on soil C storage. In this study, we explored how the soil organic matter decomposition rate (R-s) and its temperature sensitivity (Q(10)) are altered with water-table gradients in high-latitude swamp soil. We sampled soil from cold-temperate forest swamps at three water-table gradients (permanently flooded, seasonally flooded, and non-flooded) in the high-latitude areas of Genhe and Mohe in China. We then conducted an incubation experiment using a new mode of varying incubation temperature, with rapid and continuous measurements of R-s. Our results showed that R-s at 20 degrees C (R-20) was significantly higher in seasonally flooded (SF) swamp soil, compared to permanently flooded (PF) or non-flooded (NF) soil. Soil redox condition mainly controlled R-20 during the early drying stage of forest swamps, while substrate quantity and quality dominated the latter stage. The highest Q(10) was observed in SF soils in Genhe, but this was not significant compared to the Q(10) in soils from Mohe. There were clear regional differences in Q(10) driven by changes to soil substrate (dissolved organic C and nitrogen) and physicochemical properties. Our findings indicate that high-latitude forest swamp soils may emit more CO2 and act as a C source under the scenarios of artificial draining and climate warming.
资助项目	Natural Science Foundation of China[31770655] ; Natural Science Foundation of China[41671045] ; Chinese Academy of Sciences Strategic Priority Research Program[XDA19020302] ; National Key R&D program of China[2017YFC0503904] ; program of Youth Innovation Research Team Project[LENOM2016Q0005]
WOS关键词	MICROBIAL RESPIRATION ; PHENOL OXIDASE ; CARBON ; COMMUNITY ; WETLAND ; PEATLANDS ; PATTERNS ; MOISTURE ; QUALITY ; LEVEL
WOS研究方向	Geology ; Agriculture ; Water Resources
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000566699000021
资助机构	Natural Science Foundation of China ; Chinese Academy of Sciences Strategic Priority Research Program ; National Key R&D program of China ; program of Youth Innovation Research Team Project
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/156833]
专题	中国科学院地理科学与资源研究所
通讯作者	Xu, Li
作者单位	1.Northeast Normal Univ, Sch Environm, State Environm Protect Key Lab Wetland Ecol & Veg, Changchun 130117, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 4.Northeast Normal Univ, Inst Grassland Sci, Changchun 130024, Peoples R China 5.Minist Educ, Key Lab Vegetat Ecol, Changchun 130024, Peoples R China
推荐引用方式 GB/T 7714	Bian, Hongfeng,Zheng, Shuai,Liu, Yuan,et al. Changes to soil organic matter decomposition rate and its temperature sensitivity along water table gradients in cold-temperate forest swamps[J]. CATENA,2020,194:9.
APA	Bian, Hongfeng,Zheng, Shuai,Liu, Yuan,Xu, Li,Chen, Zhi,&He, Nianpeng.(2020).Changes to soil organic matter decomposition rate and its temperature sensitivity along water table gradients in cold-temperate forest swamps.CATENA,194,9.
MLA	Bian, Hongfeng,et al."Changes to soil organic matter decomposition rate and its temperature sensitivity along water table gradients in cold-temperate forest swamps".CATENA 194(2020):9.