Soil drainage facilitates earthworm invasion and subsequent carbon loss from peatland soil

doi:10.1111/1365-2664.12894

	Soil drainage facilitates earthworm invasion and subsequent carbon loss from peatland soil
	Wu, XW; Cao, R; Wei, X; Xi, XQ; Shi, PL; Eisenhauer, N; Sun, SC; Sun, SC (reprint author), Nanjing Univ, Dept Ecol, Coll Life Sci, Nanjing 210023, Jiangsu, Peoples R China.; Sun, SC (reprint author), Chengdu Inst Biol, Ctr Ecol Studies, 9 Sect 4 Renminnan Rd, Chengdu 610041, Sichuan, Peoples R China.
刊名	JOURNAL OF APPLIED ECOLOGY
	2017
卷号	54 期号:5 页码:1291-1300
关键词	Anthropogenic Environmental Change Biological Invasion Cabon Dynamics Carbon Loss Climate Change Earthworm Peatland Qinghai-tibet Plateau Soil Animal Water-table
DOI	10.1111/1365-2664.12894
产权排序	2
文献子类	Article
英文摘要	1. Human activities have been a significant driver of environmental changes with tremendous consequences for carbon (C) dynamics. Peatlands are critical ecosystems because they store similar to 30% of the global soil organic C pool and are particularly vulnerable to anthropogenic changes. The Zoige peatland on the eastern Tibet Plateau, as the largest alpine peatland in the world, accounts for 1 parts per thousand of global peat soil organic C storage. However, this peatland has experienced dramatic climate change including increased temperature and reduced precipitation in the past decades, which likely is responsible for a decline of the water-table and facilitated earthworm invasion, two major factors reducing soil organic carbon (SOC) storage of peatlands. 2. Because earthworms often are more active in low-than in high-moisture peatlands, we hypothesized that the simultaneous occurrence of water-table decline and earthworm invasion would synergistically accelerate the release of SOC from peatland soil. We conducted a field experiment with a paired split-plot design, i.e. presence vs. absence of the invasive earthworms (Pheretima aspergillum) nested in drained vs. undrained plots, respectively, for 3 years within the homogenous Zoige peatland. 3. Water-table decline significantly decreased soil water content and bulk density, resulting in a marked reduction of SOC storage. Moreover, consistent with our hypothesis, earthworm presence dramatically reduced SOC in the drained but not in the undrained peatland through the formation of deep burrows and decreasing bulk density of the lower soil layer over 3 years. The variation in SOC likely was due to changes in above-ground plant biomass, root growth and earthworm behaviour induced by the experimental treatments. 4. Synthesis and applications. We suggest that incentive measures should be taken to prevent further water-table decline and earthworm invasion for maintaining the soil carbon pool in Zoige peatland. Artificial filling of drainage canals should be implemented to increase the water-table level, facilitating the recovery of drained peatlands. Moreover, the dispersal of earthworms and their cocoons attached to the roots of crop plants and tree saplings from low-lying areas to the Zoige region should be prevented.
学科主题	Biodiversity & Conservation ; Environmental Sciences & Ecology
语种	英语
资助机构	We thank Kai He, Yangheshan Yang and Chuan Zhao for field assistance. We thank Matthew Carroll and one anonymous reviewer for very helpful comments on the manuscript. This study was supported by National Science Foundation of China (31325004, 31470482 and 31530007), 973 Program (2013CB956302), Strategic Priority Research Program of the Chinese Academy of Sciences (XDA05050702), and the German Research Foundation (FZT 118) and the European Research Council (ERC Starting Grant 677232, ECOWORM) to N.E. The authors declare no competing financial interests. ; National Science Foundation of China [31325004, 31470482, 31530007] ; We thank Kai He, Yangheshan Yang and Chuan Zhao for field assistance. We thank Matthew Carroll and one anonymous reviewer for very helpful comments on the manuscript. This study was supported by National Science Foundation of China (31325004, 31470482 and 31530007), 973 Program (2013CB956302), Strategic Priority Research Program of the Chinese Academy of Sciences (XDA05050702), and the German Research Foundation (FZT 118) and the European Research Council (ERC Starting Grant 677232, ECOWORM) to N.E. The authors declare no competing financial interests. ; National Science Foundation of China [31325004, 31470482, 31530007] ; 973 Program [2013CB956302] ; 973 Program [2013CB956302] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDA05050702] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDA05050702] ; German Research Foundation [FZT 118] ; German Research Foundation [FZT 118] ; European Research Council (ERC) [677232] ; European Research Council (ERC) [677232] ; We thank Kai He, Yangheshan Yang and Chuan Zhao for field assistance. We thank Matthew Carroll and one anonymous reviewer for very helpful comments on the manuscript. This study was supported by National Science Foundation of China (31325004, 31470482 and 31530007), 973 Program (2013CB956302), Strategic Priority Research Program of the Chinese Academy of Sciences (XDA05050702), and the German Research Foundation (FZT 118) and the European Research Council (ERC Starting Grant 677232, ECOWORM) to N.E. The authors declare no competing financial interests. ; National Science Foundation of China [31325004, 31470482, 31530007] ; We thank Kai He, Yangheshan Yang and Chuan Zhao for field assistance. We thank Matthew Carroll and one anonymous reviewer for very helpful comments on the manuscript. This study was supported by National Science Foundation of China (31325004, 31470482 and 31530007), 973 Program (2013CB956302), Strategic Priority Research Program of the Chinese Academy of Sciences (XDA05050702), and the German Research Foundation (FZT 118) and the European Research Council (ERC Starting Grant 677232, ECOWORM) to N.E. The authors declare no competing financial interests. ; National Science Foundation of China [31325004, 31470482, 31530007] ; 973 Program [2013CB956302] ; 973 Program [2013CB956302] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDA05050702] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDA05050702] ; German Research Foundation [FZT 118] ; German Research Foundation [FZT 118] ; European Research Council (ERC) [677232] ; European Research Council (ERC) [677232]
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/29100]
专题	成都生物研究所_生态研究
通讯作者	Sun, SC (reprint author), Nanjing Univ, Dept Ecol, Coll Life Sci, Nanjing 210023, Jiangsu, Peoples R China.; Sun, SC (reprint author), Chengdu Inst Biol, Ctr Ecol Studies, 9 Sect 4 Renminnan Rd, Chengdu 610041, Sichuan, Peoples R China.
推荐引用方式 GB/T 7714	Wu, XW,Cao, R,Wei, X,et al. Soil drainage facilitates earthworm invasion and subsequent carbon loss from peatland soil[J]. JOURNAL OF APPLIED ECOLOGY,2017,54(5):1291-1300.
APA	Wu, XW.,Cao, R.,Wei, X.,Xi, XQ.,Shi, PL.,...&Sun, SC .(2017).Soil drainage facilitates earthworm invasion and subsequent carbon loss from peatland soil.JOURNAL OF APPLIED ECOLOGY,54(5),1291-1300.
MLA	Wu, XW,et al."Soil drainage facilitates earthworm invasion and subsequent carbon loss from peatland soil".JOURNAL OF APPLIED ECOLOGY 54.5(2017):1291-1300.