›› 2011, Vol. 19 ›› Issue (6): 910-916.DOI: 10.11733/j.issn.1007-0435.2011.06.004

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Annual Carbon Dioxide Flux Variations of Alpine Shrub Ecosystem in the Qinghai-Tibet Plateau

QIAO Chun-lian1,2,3, LI Jing-mei1,2,3, WANG Ji-heng1,2,3, GE Shi-dong1,2, ZHAO Liang1,3, XU Shi-xiao1,3   

  1. 1. Northwest Plateau Institute of Biology, CAS, Xining, Qinghai Province 810008, China;
    2. Graduate School of Chinese Academic of Science, Beijing 100049, China;
    3. Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai Province 810008, China
  • Received:2011-04-11 Revised:2011-09-12 Online:2011-12-15 Published:2012-07-09

青藏高原高寒灌丛生态系统CO2通量年变化特征研究

乔春连1,2,3, 李婧梅1,2,3, 王基恒1,2,3, 葛世栋1,2, 赵亮1,3, 徐世晓1,3   

  1. 1. 中科院西北高原生物研究所, 青海西宁810008;
    2. 中国科学院研究生院, 北京100049;
    3. 中国科学院高原生物适应与进化重点实验室, 青海西宁810008
  • 通讯作者: 徐世晓,E-mail:xushixiaoqh@126.com
  • 作者简介:乔春连(1985- ),女,山东青岛人,硕士研究生,主要从事植物生态学研究,E-mail:qiaochunlian2008@126.com
  • 基金资助:
    国家自然科学基金(41030105)(30970519)(31070437);中国科学院知识创新工程(KSCX2-YW-Z-1020);中国科学院战略性先导科技专项(XDA05070200)资助

Abstract: Alpine shrub ecosystem is an alpine meadow vegetation type widely distributed in the Qinghai-Tibet Plateau.It is a crucial component of biogeochemical cycles between the atmosphere and surface playing an important role of ecosystem carbon balance.Continuous CO2 flux observation using the eddy covariance method in the alpine shrub of Qinghai-Tibet Plateau indicates that the alpine shrub ecosystem was a weak sink for atmospheric CO2 with a net ecosystem CO2 exchange(NEE) capacity of 223,277 and 61 g CO2·m-2·a-1 from 2003 to 2005,respectively.Compared to other grassland ecosystems types,the alpine shrub ecosystem of Haibei area can play a role in atmospheric CO2 sinks during the tested period.

Key words: Alpine shrub, CO2 flux, Annual variations, Net ecosystem CO2 exchange(NEE)

摘要: 高寒灌丛生态系统是广布于青藏高原的高寒草甸植被类型,它是青藏高原大气与地面之间生物地球化学循环的重要构成部分,在区域生态系统碳平衡中起着极为重要的作用。采用涡度相关法对青藏高原高寒灌丛CO2通量进行连续观测(2003年1月1日至2005年12月31日),结果表明:2003,2004和2005年高寒灌丛年净生态系统CO2交换量分别为223,277和61g CO2·m-2·a-1,3年平均CO2值为187g CO2·m-2·a-1;与其他地区草地生态系统类型相比,在为期3年的研究时段海北地区高寒灌丛生态系统表现为大气CO2的汇。

关键词: 高寒灌丛, CO2通量, 年变化, 净生态系统CO2交换量

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