Spatial and temporal variation in autochthonous and allochthonous contributors to increased organic carbon and nitrogen burial in a plateau lake

doi:10.1016/j.scitotenv.2017.06.118

	Spatial and temporal variation in autochthonous and allochthonous contributors to increased organic carbon and nitrogen burial in a plateau lake
	Huang, Changchun 1,2,3,4; Yao, Ling 5; Zhang, Yunlin 6; Huang, Tao 1,4; Zhang, Mingli 1; Zhu, A-Xing 1,3,7; Yang, Hao 1,4
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2017-12-15
卷号	603 页码:390-400
关键词	Dianchi Lake Algal blooms Human activities Carbon cycling Land-use cover change
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2017.06.118
通讯作者	Huang, Changchun(huangchangchun_aaa@163.com)
英文摘要	Increased organic carbon and nitrogen accumulation rates (OCAR and ONAR) in lake sediment significantly regulate the global carbon cycle. However, the reasons for and contributors to the increased OCAR and ONAR are unclear. Seven sediment cores, collected in July 2014 from Dianchi Lake, China, were used to evaluate the effects of autochthonous and allochthonous sources on OCAR and ONAR. The results indicate that OCAR and ONAR increased by factors of 4.33 and 7.34 over the past hundred years (1900-2000), particularly after algal blooms began to occur frequently (beginning in the 1980s). Dianchi stored 0.467 +/- 0.0055 Tg (mean value +/- standard deviation) organic carbon (OC) and 0.033 +/- 0.0004 Tg organic nitrogen (ON) after 1986, which is almost equal to the total storage of OC and ON from 1900 to 1985 (OC, 0.468 +/- 0.0022 Tg; ON, 0.032 +/- 0.0002 Tg). OCAR and ONAR increases were due to increasing autochthonous production and allochthonous loading. Examination of the increased OCAR, which was estimated from a newly developed multi-source mixing model, suggests that >90% of increased OCAR was caused by allochthonous sources (such as intensified cultivation, land-use cover change, etc.) in southern and eastern Dianchi and that >70% of the increased OCAR was due to autochthonous sources in western and northern Dianchi Lake. The significant spatial and temporal variation in the contributors to increased OCAR indicates complicated migration and transformation of OC in inland lakes. Land use cover change around Dianchi and the occurrence of algal blooms regulate the contributions of allochthonous and autochthonous sources to the increased OC and ON. (C) 2017 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[41503075] ; National Natural Science Foundation of China[41673108] ; National Natural Science Foundation of China[41571324] ; Priority Academic Program Development of Jiangsu Higher Education Institutions ; State Key Laboratory of Lake Science and Environment[2016SKL005] ; China Postdoctoral Science Foundation Funded Project[2015M581826] ; A-Xing Zhu through the Vilas Associate Award ; Hammel Faculty Fellow Award ; Manasse Chair Professorship from the University of Wisconsin-Madison ; One-Thousand Talents Program of China
WOS关键词	N-ALKANES ; LACUSTRINE SEDIMENTS ; ISOTOPIC COMPOSITION ; ENERGY-CONSUMPTION ; DIOXIDE EMISSIONS ; NORTHERN SPAIN ; CO2 EMISSIONS ; INLAND WATERS ; BOREAL LAKES ; CHINA
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000405981500041
资助机构	National Natural Science Foundation of China ; Priority Academic Program Development of Jiangsu Higher Education Institutions ; State Key Laboratory of Lake Science and Environment ; China Postdoctoral Science Foundation Funded Project ; A-Xing Zhu through the Vilas Associate Award ; Hammel Faculty Fellow Award ; Manasse Chair Professorship from the University of Wisconsin-Madison ; One-Thousand Talents Program of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/62524]
专题	中国科学院地理科学与资源研究所
通讯作者	Huang, Changchun
作者单位	1.Nanjing Normal Univ, Jiangsu Ctr Collaborat Innovat Geog Informat Reso, Nanjing 210023, Jiangsu, Peoples R China 2.Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing 210023, Jiangsu, Peoples R China 3.Nanjing Normal Univ, Minist Educ, Key Lab Virtual Geog Environm, Nanjing 210023, Jiangsu, Peoples R China 4.Nanjing Normal Univ, Sch Geog Sci, Nanjing 210023, Jiangsu, Peoples R China 5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing, Peoples R China 6.Chinese Acad Sci, Nanjing Inst Geog & Limnol, Nanjing 210023, Jiangsu, Peoples R China 7.Univ Wisconsin, Dept Geog, Madison, WI 53706 USA
推荐引用方式 GB/T 7714	Huang, Changchun,Yao, Ling,Zhang, Yunlin,et al. Spatial and temporal variation in autochthonous and allochthonous contributors to increased organic carbon and nitrogen burial in a plateau lake[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2017,603:390-400.
APA	Huang, Changchun.,Yao, Ling.,Zhang, Yunlin.,Huang, Tao.,Zhang, Mingli.,...&Yang, Hao.(2017).Spatial and temporal variation in autochthonous and allochthonous contributors to increased organic carbon and nitrogen burial in a plateau lake.SCIENCE OF THE TOTAL ENVIRONMENT,603,390-400.
MLA	Huang, Changchun,et al."Spatial and temporal variation in autochthonous and allochthonous contributors to increased organic carbon and nitrogen burial in a plateau lake".SCIENCE OF THE TOTAL ENVIRONMENT 603(2017):390-400.