Variation in quantity and chemical composition of soil dissolved organic matter in a peri-urban critical zone observatory watershed in Eastern China

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 城市与区域生态国家重点实验室

	Variation in quantity and chemical composition of soil dissolved organic matter in a peri-urban critical zone observatory watershed in Eastern China
	Tang, Jianfeng 1; Wang, Wendong 4; Yang, Lei 5; Cao, Changli 1; Li, Xinhu 3
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2019-10-20
卷号	688 页码:622-631
关键词	Dissolved organic matter Excitation emission matrices Fluorescence Peri-urban area Soil UV-vis spectroscopy
ISSN号	0048-9697
英文摘要	Soil organic matter plays a fundamental role in terrestrial ecosystems. However, little is known about the spectral characteristics and fluorescent components of soil dissolved organic matter (DOM) in peri-urban ecosystems and their influencing factors. In this study, we used the fluorescence excitation-emission matrix and parallel factor analysis (EEM-PARAFAC) to characterize soil DOM in a peri-urban Critical Zone Observatory watershed in Eastern China. Soil samples were collected at depths of 0-10 cm, 10-20 cm, and 20-40 cm from 82 sites (29 forest, 11 orchard, and 42 cropland). The results showed that soil organic carbon and water-soluble organic carbon content varied with land use type, and both were significantly higher in forest than cropland and orchard samples. Three fluorescent components, humic-Julfic-, and protein-like substances, were derived from soil DOM using the PARAFAC model. All these components were distributed differently in the three land use types, as were their UV and fluorescence indices. The spatial distribution of soil DOM showed that the quantity and chemical composition of DOM were affected by environmental variables and human disturbance, among which pH and altitude significantly affected DOM content. Anthropogenic parameters such as distance to road and distance to town strongly influenced the chemical composition and characteristics of soil DOM. Negative correlations were observed between humic-like substances and distance to road or town, while positive correlations were observed between protein-like substances and these two parameters. These results demonstrate the pronounced influence of human activities on DOM composition and characteristics in the watershed area. The findings highlight the value of soil DOM characterization to better understand the origin, composition, and fate of DOM in soils in peri-urban critical zones. (C) 2019 Elsevier B.V. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/42483]
专题	生态环境研究中心_城市与区域生态国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Urban Environm, Key Lab Urban Environm & Hlth, Xiamen 361021, Fujian, Peoples R China 2.Tongji Univ, Coll Architecture & Urban Planning, Shanghai 200082, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China 5.Chinese Acad Sci, Ningbo Urban Environm Observat & Res Stn, Ningbo Key Lab Urban Environm Proc & Pollut Contr, Ningbo 315800, Zhejiang, Peoples R China
推荐引用方式 GB/T 7714	Tang, Jianfeng,Wang, Wendong,Yang, Lei,et al. Variation in quantity and chemical composition of soil dissolved organic matter in a peri-urban critical zone observatory watershed in Eastern China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,688:622-631.
APA	Tang, Jianfeng,Wang, Wendong,Yang, Lei,Cao, Changli,&Li, Xinhu.(2019).Variation in quantity and chemical composition of soil dissolved organic matter in a peri-urban critical zone observatory watershed in Eastern China.SCIENCE OF THE TOTAL ENVIRONMENT,688,622-631.
MLA	Tang, Jianfeng,et al."Variation in quantity and chemical composition of soil dissolved organic matter in a peri-urban critical zone observatory watershed in Eastern China".SCIENCE OF THE TOTAL ENVIRONMENT 688(2019):622-631.