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

doi:10.11733/j.issn.1007-0435.2011.06.004

›› 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-lian^1,2,3, LI Jing-mei^1,2,3, WANG Ji-heng^1,2,3, GE Shi-dong^1,2, ZHAO Liang^1,3, XU Shi-xiao^1,3

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. 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

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

CLC Number:

Q948.1

QIAO Chun-lian, LI Jing-mei, WANG Ji-heng, GE Shi-dong, ZHAO Liang, XU Shi-xiao. Annual Carbon Dioxide Flux Variations of Alpine Shrub Ecosystem in the Qinghai-Tibet Plateau[J]. , 2011, 19(6): 910-916.

乔春连, 李婧梅, 王基恒, 葛世栋, 赵亮, 徐世晓. 青藏高原高寒灌丛生态系统CO₂通量年变化特征研究[J]. , 2011, 19(6): 910-916.

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

青藏高原高寒灌丛生态系统CO₂通量年变化特征研究

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

青藏高原高寒灌丛生态系统CO2通量年变化特征研究

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青藏高原高寒灌丛生态系统CO₂通量年变化特征研究