干旱区生态环境知识资源中心(Arid): 盐生荒漠净生态系统碳交换的涡度相关法和箱式法对比

Arid

	盐生荒漠净生态系统碳交换的涡度相关法和箱式法对比
其他题名	Net ecosystem carbon exchange in saline desert: A comparison of eddy covariance method and chamber-based method
	马杰; 吴玉; 郑新军; 唐立松; 王玉刚
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2013
卷号	32 期号:10 页码:2627-2634
中文摘要	将叶面积指数的季节动态,与箱式法同步观测得到的同化枝净光合(呼吸)速率和土壤呼吸速率相结合,对群落碳交换进行估算,并以此验证盐生荒漠涡度相关数据的可靠性。结果表明:盐生荒漠生态系统年叶片生物量为51.305.56 g·m~(-2),其中90.45%以上来源于多枝柽柳的贡献;而整个生长季,群落叶面积指数(LAI)呈单峰形式变化,从5月30日9月30日,LAI介于0.18~0.30,并在第197天达到最大值。涡度相关法和箱式法对群落碳交换的测定结果表明,群落碳交换存在显著的季节变化,并于7月中旬达到碳同化峰值,与LAI有显著的相关性(P<0.001)。对比发现,两种测量方法对群落碳交换日过程的测定结果有很好的一致性,但对夜间生态系统呼吸的测定,涡度相关法较箱式法存在略微的低估,引起这种低估的原因可能是夜间湍流较弱。
英文摘要	By coupling the seasonal variation of leaf area index (LAI) with the synchronous chamber-based measurement of leaf net photosynthesis (respiration) rate and soil CO_2 flux, the ecosystem carbon exchange in a saline desert was estimated, and the results were used to verify the reliability of eddy covariance data. The annual total leaf biomass of the saline desert ecosystem was 51.305.56 g·m~(-2), of which, more than 90.45% were contributed by Tamarix ramosissima. In the whole growth season, the LAI varied in single peak pattern, being 0.18-0.30 from the 30th of May to the 30th of September and peaked at the 197th day. The measurement of the carbon flux by eddy covariance method and chamber-based method showed that the net ecosystem carbon exchange had an obvious seasonal variation, which peaked in mid-July and had significant correlation with LAI (P<0.001). Through comparison, the daytime ecosystem carbon exchange from eddy covariance measurement was agreed well with that from chamber-based measurement, but the nighttime ecosystem carbon exchange from eddy covariance measurement was slightly underestimated, probably due to the weak turbulence during the night.
中文关键词	盐生荒漠 ; 净生态系统碳交换 ; 涡度相关法 ; 箱式法
英文关键词	saline desert net ecosystem exchange eddy covariance method chamber-based method
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FISHERIES
WOS研究方向	Fisheries
CSCD记录号	CSCD:4953309
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/230081
作者单位	中国科学院新疆生态与地理研究所, 荒漠与绿洲国家重点实验室, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	马杰,吴玉,郑新军,等. 盐生荒漠净生态系统碳交换的涡度相关法和箱式法对比[J]. 中国科学院新疆生态与地理研究所,2013,32(10):2627-2634.
APA	马杰,吴玉,郑新军,唐立松,&王玉刚.(2013).盐生荒漠净生态系统碳交换的涡度相关法和箱式法对比.生态学杂志,32(10),2627-2634.
MLA	马杰,et al."盐生荒漠净生态系统碳交换的涡度相关法和箱式法对比".生态学杂志 32.10(2013):2627-2634.