中国科学院西北高原生物研究所机构知识库
Advanced  
NWIPB OpenIR  > 中国科学院西北高原生物研究所  > 期刊论文
题名: Temperature and biomass influences on interannual changes in CO2 exchange in an alpine meadow on the Qinghai-Tibetan Plateau
作者: Kato, Tomomichi; Tang, Yanhong; Gu, Song; Hirota, Mitsuru; Du, Mingyuan; Li, Yingnian; Zhao, Xinquan
刊名: GLOBAL CHANGE BIOLOGY
出版日期: 2006-07-01
卷号: 12, 期号:7, 页码:1285-1298
关键词: alpine ecosystem ; carbon dynamics ; eddy covariance ; global warming ; interannual variability
学科分类: 生物科学
文章类型: Article
中文摘要: Three years of eddy covariance measurements were used to characterize the seasonal and interannual variability of the CO2 fluxes above an alpine meadow (3250 m a.s.l.) on the Qinghai-Tibetan Plateau, China. This alpine meadow was a weak sink for atmospheric CO2, with a net ecosystem production (NEP) of 78.5, 91.7, and 192.5 g C m(-2) yr(-1) in 2002, 2003, and 2004, respectively. The prominent, high NEP in 2004 resulted from the combination of high gross primary production (GPP) and low ecosystem respiration (R-e) during the growing season. The period of net absorption of CO2 in 2004, 179 days, was 10 days longer than that in 2002 and 5 days longer than that in 2003. Moreover, the date on which the mean air temperature first exceeded 5.0 degrees C was 10 days earlier in 2004 (DOY110) than in 2002 or 2003. This date agrees well with that on which the green aboveground biomass (Green AGB) started to increase. The relationship between light-use efficiency and Green AGB was similar among the three years. In 2002, however, earlier senescence possibly caused low autumn GPP, and thus the annual NEP, to be lower. The low summertime R-e in 2004 was apparently caused by lower soil temperatures and the relatively lower temperature dependence of R-e in comparison with the other years. These results suggest that (1) the Qinghai-Tibetan Plateau plays a potentially significant role in global carbon sequestration, because alpine meadow covers about one-third of this vast plateau, and (2) the annual NEP in the alpine meadow was comprehensively controlled by the temperature environment, including its effect on biomass growth.
英文摘要: Three years of eddy covariance measurements were used to characterize the seasonal and interannual variability of the CO2 fluxes above an alpine meadow (3250 m a.s.l.) on the Qinghai-Tibetan Plateau, China. This alpine meadow was a weak sink for atmospheric CO2, with a net ecosystem production (NEP) of 78.5, 91.7, and 192.5 g C m(-2) yr(-1) in 2002, 2003, and 2004, respectively. The prominent, high NEP in 2004 resulted from the combination of high gross primary production (GPP) and low ecosystem respiration (R-e) during the growing season. The period of net absorption of CO2 in 2004, 179 days, was 10 days longer than that in 2002 and 5 days longer than that in 2003. Moreover, the date on which the mean air temperature first exceeded 5.0 degrees C was 10 days earlier in 2004 (DOY110) than in 2002 or 2003. This date agrees well with that on which the green aboveground biomass (Green AGB) started to increase. The relationship between light-use efficiency and Green AGB was similar among the three years. In 2002, however, earlier senescence possibly caused low autumn GPP, and thus the annual NEP, to be lower. The low summertime R-e in 2004 was apparently caused by lower soil temperatures and the relatively lower temperature dependence of R-e in comparison with the other years. These results suggest that (1) the Qinghai-Tibetan Plateau plays a potentially significant role in global carbon sequestration, because alpine meadow covers about one-third of this vast plateau, and (2) the annual NEP in the alpine meadow was comprehensively controlled by the temperature environment, including its effect on biomass growth.
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Biodiversity Conservation ; Ecology ; Environmental Sciences
研究领域[WOS]: Biodiversity & Conservation ; Environmental Sciences & Ecology
关键词[WOS]: CARBON-DIOXIDE EXCHANGE ; NATIVE TALLGRASS PRAIRIE ; GROSS PRIMARY PRODUCTION ; NET ECOSYSTEM EXCHANGE ; WATER-VAPOR ; ENVIRONMENTAL CONTROLS ; TUNDRA ECOSYSTEMS ; SOIL RESPIRATION ; ENERGY-EXCHANGE ; ARCTIC TUNDRA
收录类别: SCI
语种: 英语
WOS记录号: WOS:000238352800011
Citation statistics:
内容类型: 期刊论文
URI标识: http://210.75.249.4/handle/363003/1326
Appears in Collections:中国科学院西北高原生物研究所_期刊论文

Files in This Item: Download All
File Name/ File Size Content Type Version Access License
Temperature and biomass influences on interannual changes in CO2 exchange in an alpine meadow on the Qinghai-Tibetan Plateau.pdf(340KB)----开放获取View Download

作者单位: 1.Japan Agcy Marine Earth Sci & Technol, Frontier Res Ctr Global Change, Ecosyst Change Res Program, Kanazawa Ku, Yokohama, Kanagawa 2360001, Japan
2.Natl Inst Environm Studies, Tsukuba, Ibaraki 3058569, Japan
3.Chinese Acad Sci, NW Plateau Inst Biol, Xining 810001, Qinghai, Peoples R China
4.Natl Inst Agroenvironm Sci, Tsukuba, Ibaraki 3058604, Japan

Recommended Citation:
Kato T, Tang YH, Gu S, Hirota M, Du MY, Li YN, Zhao XQ.Temperature and biomass influences on interannual changes in CO2 exchange in an alpine meadow on the Qinghai-Tibetan Plateau.GLOBAL CHANGE BIOLOGY,2006,12(7):1285-1298
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Kato, Tomomichi]'s Articles
[Tang, Yanhong]'s Articles
[Gu, Song]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Kato, Tomomichi]‘s Articles
[Tang, Yanhong]‘s Articles
[Gu, Song]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit
文件名: Temperature and biomass influences on interannual changes in CO2 exchange in an alpine meadow on the Qinghai-Tibetan Plateau.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!