Long-term phosphorus addition enhances the biodegradability of dissolved organic carbon in a nitrogen-limited temperate freshwater wetland

doi:10.1016/j.scitotenv.2017.06.200

CORC > 重庆绿色智能技术研究院 > 中国科学院重庆绿色智能技术研究院 > 生态过程与重建研究中心

	Long-term phosphorus addition enhances the biodegradability of dissolved organic carbon in a nitrogen-limited temperate freshwater wetland
	Mao, Rong 1,2; Zhang, Xin-Hou 1; Li, Si-Yue2 ; Song, Chang-Chun 1; Mao, Rong 3,4; Zhang, Xin-Hou 3; Li, Si-Yue 4; Song, Chang-Chun 3
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2017-12-15
卷号	605 页码:332-336
关键词	Stoichiometry Carbon cycle Carbon dioxide Decomposition Eutrophication Marsh
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2017.06.200
通讯作者	Mao, R (reprint author), Chinese Acad Sci, Northeast Inst Geog & Agroecol, 4888 Shengbei Rd, Changchun, Jilin, Peoples R China.
英文摘要	Phosphorus (P) enrichment is expected to strongly influence dissolved organic carbon (DOC) biodegradation. However, the relationship between P availability and DOC biodegradation is largely unknown in nitrogen (N)limited ecosystems. Here, we investigated the changes in the ratio of DOC to dissolved total nitrogen (DTN), specific UV absorbance at 254 nm(SUVA(254)), and DOC biodegradation in surface water and soil pore water (0-15 cm depth) following eight years of multi-level P addition (0, 1.2, 4.8, and 9.6 g Pm-2 year(-1)) in an N-limited freshwater marsh in Northeast China. We found that P addition caused an increase in DOC biodegradation in surface water and soil pore water, irrespective of the P addition levels. Compared with the control treatment, the P addition rates of 1.2, 4.8, and 9.6 g Pm-2 year(-1) increasedDOC biodegradation by 20.7%, 15.2%, and 14.5% in surface waters, and 11.3%, 9.4%, and 12.0% in soil pore waters, respectively. The DOC biodegradationwas separately negatively correlated with the DOC: DTN ratio and SUVA(254), indicating that the positive effect of P addition on DOC biodegradation was caused by the elevated N concentration and the reduced DOC aromaticity. Our findings suggest that P enrichment enhances the biodegradability of DOC through increased N availability and altered DOC chemical composition, which would accelerate DOC loss from the waters and alter ecosystem C balance in N-limited temperate wetlands. (C) 2017 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[31570479] ; National Natural Science Foundation of China[41125001] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2013152] ; Chinese Academy of Sciences
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000408275500036
内容类型	期刊论文
源URL	[http://172.16.51.4:88/handle/2HOD01W0/101]
专题	生态过程与重建研究中心
通讯作者	Mao, Rong; Mao, Rong
作者单位	1.Chinese Acad Sci, Northeast Inst Geog & Agroecol, Key Lab Wetland Ecol & Environm, Changchun 130102, Jilin, Peoples R China 2.Chinese Acad Sci, Three Gorges Inst Ecol Environm, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 3.Chinese Acad Sci, Northeast Inst Geog & Agroecol, Key Lab Wetland Ecol & Environm, Changchun 130102, Jilin, Peoples R China 4.Chinese Acad Sci, Three Gorges Inst Ecol Environm, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China
推荐引用方式 GB/T 7714	Mao, Rong,Zhang, Xin-Hou,Li, Si-Yue,et al. Long-term phosphorus addition enhances the biodegradability of dissolved organic carbon in a nitrogen-limited temperate freshwater wetland[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2017,605:332-336.
APA	Mao, Rong.,Zhang, Xin-Hou.,Li, Si-Yue.,Song, Chang-Chun.,Mao, Rong.,...&Song, Chang-Chun.(2017).Long-term phosphorus addition enhances the biodegradability of dissolved organic carbon in a nitrogen-limited temperate freshwater wetland.SCIENCE OF THE TOTAL ENVIRONMENT,605,332-336.
MLA	Mao, Rong,et al."Long-term phosphorus addition enhances the biodegradability of dissolved organic carbon in a nitrogen-limited temperate freshwater wetland".SCIENCE OF THE TOTAL ENVIRONMENT 605(2017):332-336.