Effects of Grazing on Ecosystem CO2 Exchange in a MeadowGrassland on the Tibetan Plateau During the Growing Season | |
Chen,J(Chen,Ji)[1,2]; Shi,WY(Shi,Weiyu)[1]; Cao,JJ(Cao,Junji)[1,3] | |
2015-02 | |
发表期刊 | Environmental Management |
卷号 | 55期号:2页码:347-359 |
文章类型 | 期刊论文 |
摘要 | Effects of human activity on ecosystem carbon fluxes (e.g., net ecosystem exchange (NEE), ecosystem respiration (R eco), and gross ecosystem exchange (GEE)) are crucial for projecting future uptake of CO2 in terrestrial ecosystems. However, how ecosystem that carbon fluxes respond to grazing exclusion is still under debate. In this study, a field experiment was conducted to study the effects of grazing exclusion on R eco, NEE, and GEE with three treatments (free-range grazing (FG) and grazing exclusion for 3 and 5 years (GE3 and GE5, respectively)) in a meadow grassland on the Tibetan Plateau. Our results show that grazing exclusion significantly increased NEE by 47.37 and 15.84 %, and R eco by 33.14 and 4.29 % under GE3 and GE5 plots, respectively, although carbon sinks occurred in all plots during the growing season, with values of 192.11, 283.12, and 222.54 g C m−2 for FG, GE3, and GE5, respectively. Interestingly, grazing exclusion increased temperature sensitivity (Q 10) of R eco with larger increases at the beginning and end of growing season (i.e., May and October, respectively). Soil temperature and soil moisture were key factors on controlling the diurnal and seasonal variations of R eco, NEE, and GEE, with soil temperature having a stronger influence. Therefore, the combined effects of grazing and temperature suggest that grazing should be taken into consideration in assessing global warming effects on grassland ecosystem CO2 exchange. |
关键词 | Grassland Management Grazing Exclusion Ecosystem Respiration Gross Ecosystem Exchange Net Ecosystem Exchange Tibetan Plateau |
DOI | 10.1007/s00267-014-0390-z |
收录类别 | SCI |
语种 | 英语 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ieecas.cn/handle/361006/9457 |
专题 | 粉尘与环境研究室 |
作者单位 | 1.State Key Laboratory of Loess and Quaternary Geology (SKLLQG), and Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth EnvironmentChinese Academy of Sciences Xi’an China ; 2.Graduate University of Chinese Academy of Sciences Beijing China ; 3.Institute of Global Environmental ChangeXi’an Jiaotong University Xi’an China |
推荐引用方式 GB/T 7714 | Chen,J,Shi,WY,Cao,JJ. Effects of Grazing on Ecosystem CO2 Exchange in a MeadowGrassland on the Tibetan Plateau During the Growing Season[J]. Environmental Management,2015,55(2):347-359. |
APA | Chen,J,Shi,WY,&Cao,JJ.(2015).Effects of Grazing on Ecosystem CO2 Exchange in a MeadowGrassland on the Tibetan Plateau During the Growing Season.Environmental Management,55(2),347-359. |
MLA | Chen,J,et al."Effects of Grazing on Ecosystem CO2 Exchange in a MeadowGrassland on the Tibetan Plateau During the Growing Season".Environmental Management 55.2(2015):347-359. |
条目包含的文件 | ||||||
文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
Effects of Grazing o(963KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 请求全文 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论