干旱区生态环境知识资源中心(Arid): 荒漠灌丛碳通量对极端水分和温度的响应研究

Arid

	荒漠灌丛碳通量对极端水分和温度的响应研究
其他题名	Assessing impacts of extreme water and temperature conditions on carbon fluxes in two desert shrublands
	龚婷婷 1; 雷慧闽 1; 杨大文 1; 杨汉波 1; 刘廷玺 2; 段利民 2
来源期刊	水力发电学报
ISSN	1003-1243
出版年	2018
卷号	37 期号:2 页码:32-46
中文摘要	利用位于中国北方半干旱区的两个观测站(陕西榆林站和内蒙古通辽站)的碳通量及气象数据,获得荒漠灌丛生态系统碳通量的季节动态特征,并定量估算环境因子的极端状况对该生态系统各碳通量的影响.结果表明:(1)榆林站2011 2012年和通辽站2015年的净碳交换量(NEE)分别为-132.8 gC/m~2/yr和-59.6 gC/m~2/yr,表明榆林站碳汇功能更明显;(2)极端水分状况对NEE的影响大于极端温度状况的影响.以生长季平均而言(4-10月),水分和温度的极端状况对榆林站(和通辽站)的NEE的影响最大值分别为0.51 gC/m~2/s (0.26 gC/m~2/s)和0.17gC/m~2/s (0.20gC/m~2/s); (3)生长旺盛期(6-8月),高温(榆林站>27 ℃;通辽站>29 ℃)状况会抑制植被的光合作用能力,导致榆林站和通辽站的总初级生产量(GPP)相较于正常温度状况分别减少0.37 gC/m~2/s和0.53 gC/m~2/s.
英文摘要	We study the seasonal patterns of carbon fluxes in two desert shrublands of North China,Yulin Station in Shaanxi Province and Tongliao Station in Inner Mongolia Autonomous Region, using the eddy covariance technique, and qualitatively estimate the impact of extreme temperature and water conditions on carbon fluxes. Our findings show that (1) during 2011-2012,the total net ecosystem exchange (NEE) of Yulin and Tongliao were -132.8 and -59.6 gC/m~2/yr respectively, indicating that the shrub ecosystem carbon fixation capacity in Yulin was obvious. (2) Extreme water and temperature conditions have significant effects on carbon fluxes, especially extreme water conditions. On an average over the growing period (April-October), the differences of NEE relative to normal conditions at Yulin and Tongliao are 0.51 and 0.26 gC/m~2/s in the extreme water condition and 0.17 and 0.20 gC/m~2/s in the extreme temperature condition, respectively. (3) In the peak growing period (July-August), the extreme high temperature (above 27 ℃ at Yulin and above 29 ℃ at Tongliao) effectively inhibits vegetation photosynthesis, decreasing gross primary production (GPP) by 0.37 and 0.53 gC/m~2/s respectively, relative to the normal temperature condition.
中文关键词	荒漠灌丛 ; 涡度相关 ; 极端高温 ; 极端湿润 ; 净碳交换量
英文关键词	desert shrubland eddy covariance extreme high temperature extreme wet condition net ecosystem exchange
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:6162711
来源机构	内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238249
作者单位	1.清华大学, 水沙科学与水利水电工程国家重点实验室, 北京 100084, 中国; 2.内蒙古农业大学水利与土木建筑工程学院, 呼和浩特, 内蒙古 010018, 中国
推荐引用方式 GB/T 7714	龚婷婷,雷慧闽,杨大文,等. 荒漠灌丛碳通量对极端水分和温度的响应研究[J]. 内蒙古农业大学,2018,37(2):32-46.
APA	龚婷婷,雷慧闽,杨大文,杨汉波,刘廷玺,&段利民.(2018).荒漠灌丛碳通量对极端水分和温度的响应研究.水力发电学报,37(2),32-46.
MLA	龚婷婷,et al."荒漠灌丛碳通量对极端水分和温度的响应研究".水力发电学报 37.2(2018):32-46.