DOI: 10.1007/s10533-015-0072-9
Scopus记录号: 2-s2.0-84939933073
论文题名: Sediment denitrification and nitrous oxide production in Chinese plateau lakes with varying watershed land uses
作者: Liu W. ; Wang Z. ; Zhang Q. ; Cheng X. ; Lu J. ; Liu G.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 123, 期: 3 起始页码: 379
结束页码: 390
语种: 英语
英文关键词: Eutrophication
; Greenhouse gas
; Nitrogen pollution
; Potential denitrification
; Unamended denitrification
; Watershed landscape
英文摘要: Denitrification in lake sediments removes nitrogen and releases N2O to the atmosphere, contributing to global warming. However, the rates and controls of sediment denitrification and N2O production are still poorly understood in lakes. In this study, we measured potential denitrification, unamended denitrification and N2O production rate in sediments which were collected from 68 sites in 20 Chinese plateau lakes of varying watershed land uses. The result showed that potential denitrification rate of human-dominated lakes (37.94 ± 8.91 ng N g−1 h−1) was significantly higher than that of reference lakes (18.50 ± 3.22 ng N g−1 h−1). In addition, potential denitrification rate was positively related to the proportion of human land uses in watersheds. At the lake level, unamended denitrification and N2O production rates were significantly related to water chemistry or sediment properties (e.g., conductivity and sediment total nitrogen). Water chemistry and sediment properties together accounted for 0–69 % of the variance in denitrification and N2O production rates. Variance partitioning showed that unamended denitrification and N2O production rates in human-dominated lakes were controlled primarily by sediment properties, while in reference lakes were generally controlled by water chemistry. Our findings suggest that Chinese plateau lakes can remove large quantities of nitrogen through sediment denitrification and produce small amounts of N2O. The relative contributions of water chemistry and sediment properties to the lake denitrification and N2O production vary widely. © 2015, Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83523
Appears in Collections: 气候减缓与适应 气候变化事实与影响
There are no files associated with this item.
作者单位: Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, China; College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China; Australian Rivers Institute, Griffith University, Brisbane, QLD, Australia
Recommended Citation:
Liu W.,Wang Z.,Zhang Q.,et al. Sediment denitrification and nitrous oxide production in Chinese plateau lakes with varying watershed land uses[J]. Biogeochemistry,2015-01-01,123(3)