caa a22 4500 605517010 CHVBK 20210128100717.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s10533-015-0072-9 doi (NATIONALLICENCE)springer-10.1007/s10533-015-0072-9 Sediment denitrification and nitrous oxide production in Chinese plateau lakes with varying watershed land uses [Elektronische Daten] [Wenzhi Liu, Zhixiu Wang, Quanfa Zhang, Xiaoli Cheng, Jing Lu, Guihua Liu] 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±8.91ngNg−1h−1) was significantly higher than that of reference lakes (18.50±3.22ngNg−1h−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. Springer International Publishing Switzerland, 2015 Eutrophication nationallicence Greenhouse gas nationallicence Nitrogen pollution nationallicence Potential denitrification nationallicence Unamended denitrification nationallicence Watershed landscape nationallicence Liu Wenzhi Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical Garden, Chinese Academy of Sciences, 430074, Wuhan, People's Republic of China aut Wang Zhixiu Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical Garden, Chinese Academy of Sciences, 430074, Wuhan, People's Republic of China aut Zhang Quanfa Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical Garden, Chinese Academy of Sciences, 430074, Wuhan, People's Republic of China aut Cheng Xiaoli Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical Garden, Chinese Academy of Sciences, 430074, Wuhan, People's Republic of China aut Lu Jing Australian Rivers Institute, Griffith University, 4111, Brisbane, Queensland, Australia aut Liu Guihua Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical Garden, Chinese Academy of Sciences, 430074, Wuhan, People's Republic of China aut Biogeochemistry Springer International Publishing 123/3(2015-04-01), 379-390 0168-2563 123:3<379 2015 123 10533 https://doi.org/10.1007/s10533-015-0072-9 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10533-015-0072-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Liu Wenzhi Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical Garden, Chinese Academy of Sciences, 430074, Wuhan, People's Republic of China aut NATIONALLICENCE 700 1- Wang Zhixiu Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical Garden, Chinese Academy of Sciences, 430074, Wuhan, People's Republic of China aut NATIONALLICENCE 700 1- Zhang Quanfa Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical Garden, Chinese Academy of Sciences, 430074, Wuhan, People's Republic of China aut NATIONALLICENCE 700 1- Cheng Xiaoli Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical Garden, Chinese Academy of Sciences, 430074, Wuhan, People's Republic of China aut NATIONALLICENCE 700 1- Lu Jing Australian Rivers Institute, Griffith University, 4111, Brisbane, Queensland, Australia aut NATIONALLICENCE 700 1- Liu Guihua Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical Garden, Chinese Academy of Sciences, 430074, Wuhan, People's Republic of China aut NATIONALLICENCE 773 0- Biogeochemistry Springer International Publishing 123/3(2015-04-01), 379-390 0168-2563 123:3<379 2015 123 10533