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Response of ecosystem respiration to warming and grazing during the growing seasons in the alpine meadow on the Tibetan plateau

文献类型：期刊论文

作者Lin, Xingwu2; Zhang, Zhenhua3,5; Wang, Shiping1; Hu, Yigang4; Xu, Guangping6; Luo, Caiyun3; Chang, Xiaofeng3,5; Duan, Jichuang3,5; Lin, Qiaoyan3,5; Xu, Burenbayin3
刊名AGRICULTURAL AND FOREST METEOROLOGY
出版日期2011-07-15
卷号151期号:7页码:792-802
关键词Warming Grazing Ecosystem Respiration Soil Respiration Alpine Meadow Soil Temperature And Moisture Climate Change Tibetan Plateau
ISSN号0168-1923
文献子类Article
英文摘要Intensive studies reveal that there is much uncertainty regarding how ecosystem and soil respiration will respond to warming and grazing, especially in the alpine meadow ecosystem. We conducted a first of its kind field-manipulative warming and grazing experiment in an alpine meadow on the Tibetan plateau to determine the effects of warming and grazing on ecosystem and soil respiration for 3-years, from 2006 to 2008. Generally, warming and grazing did not affect seasonal average ecosystem respiration (Re), and there was no interaction between grazing and warming. However, they significantly affected the Re early in the growing season and by the end of the growing season. Warming significantly increased seasonal average soil respiration (Rs) by 9.2%, whereas the difference mainly resulted from data gathered early in the growing season, before June 2007. Positive correlations between soil temperature and Re and Rs were observed, and soil temperature explained 63-83% of seasonal Re variations during the 3-year study and 19-34% of Rs variations in 2007. Seasonal Re in 2008 and Rs in 2007 were slightly negatively correlated to soil moisture, but interannual average Re decreased with a decrease in precipitation for all treatments. Warming and grazing reduced the Q(10) value of Re in 2007 and 2008 but did not affect the Q(10) value of Rs. The Q(10) values of Rs were much lower than the Q(10) values of Re in 2007. These results suggest that grazing may reduce the temperature sensitivity of Re and that Re was mainly controlled by soil temperature rather than moisture which varied with timescale in the alpine meadow. (C) 2011 Elsevier B.V. All rights reserved.; Intensive studies reveal that there is much uncertainty regarding how ecosystem and soil respiration will respond to warming and grazing, especially in the alpine meadow ecosystem. We conducted a first of its kind field-manipulative warming and grazing experiment in an alpine meadow on the Tibetan plateau to determine the effects of warming and grazing on ecosystem and soil respiration for 3-years, from 2006 to 2008. Generally, warming and grazing did not affect seasonal average ecosystem respiration (Re), and there was no interaction between grazing and warming. However, they significantly affected the Re early in the growing season and by the end of the growing season. Warming significantly increased seasonal average soil respiration (Rs) by 9.2%, whereas the difference mainly resulted from data gathered early in the growing season, before June 2007. Positive correlations between soil temperature and Re and Rs were observed, and soil temperature explained 63-83% of seasonal Re variations during the 3-year study and 19-34% of Rs variations in 2007. Seasonal Re in 2008 and Rs in 2007 were slightly negatively correlated to soil moisture, but interannual average Re decreased with a decrease in precipitation for all treatments. Warming and grazing reduced the Q(10) value of Re in 2007 and 2008 but did not affect the Q(10) value of Rs. The Q(10) values of Rs were much lower than the Q(10) values of Re in 2007. These results suggest that grazing may reduce the temperature sensitivity of Re and that Re was mainly controlled by soil temperature rather than moisture which varied with timescale in the alpine meadow. (C) 2011 Elsevier B.V. All rights reserved.
WOS关键词CARBON-DIOXIDE EXCHANGE ; NORTHERN TEMPERATE GRASSLAND ; SOIL RESPIRATION ; TALLGRASS PRAIRIE ; CO2 EXCHANGE ; INTERANNUAL VARIABILITY ; TERRESTRIAL ECOSYSTEMS ; SPECIES RICHNESS ; CYCLE FEEDBACKS ; ORGANIC-CARBON
WOS研究方向Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
语种英语
WOS记录号WOS:000291283300004
公开日期2011-12-13
源URL[http://ir.nwipb.ac.cn//handle/363003/1528]  
专题西北高原生物研究所_中国科学院西北高原生物研究所
作者单位1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100085, Peoples R China
2.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China
3.Chinese Acad Sci, NW Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining 810008, Peoples R China
4.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
5.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
6.Chinese Acad Sci, Guangxi Inst Bot, Guangxi 541006, Peoples R China
推荐引用方式
GB/T 7714		 Lin, Xingwu,Zhang, Zhenhua,Wang, Shiping,et al. Response of ecosystem respiration to warming and grazing during the growing seasons in the alpine meadow on the Tibetan plateau[J]. AGRICULTURAL AND FOREST METEOROLOGY,2011,151(7):792-802.
APA Lin, Xingwu.,Zhang, Zhenhua.,Wang, Shiping.,Hu, Yigang.,Xu, Guangping.,...&Xie, Zubin.(2011).Response of ecosystem respiration to warming and grazing during the growing seasons in the alpine meadow on the Tibetan plateau.AGRICULTURAL AND FOREST METEOROLOGY,151(7),792-802.
MLA Lin, Xingwu,et al."Response of ecosystem respiration to warming and grazing during the growing seasons in the alpine meadow on the Tibetan plateau".AGRICULTURAL AND FOREST METEOROLOGY 151.7(2011):792-802.

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来源：西北高原生物研究所

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