A meta-analysis of the canopy light extinction coefficient in   terrestrial ecosystems

doi:10.1007/s11707-014-0446-7

CORC > 北京大学 > 城市与环境学院

	A meta-analysis of the canopy light extinction coefficient in terrestrial ecosystems
	Zhang, Liangxia ; Hu, Zhongmin ; Fan, Jiangwen ; Zhou, Decheng ; Tang, Fengpei
刊名	frontiers of earth science
	2014
关键词	canopy light extinction coefficient ecological modeling biogeochemical model forest grassland cropland leaf area index RADIATION-USE EFFICIENCY LEAF-AREA INDEX DRY-MATTER ACCUMULATION NET PRIMARY PRODUCTION SEMIARID ENVIRONMENT ANGLE DISTRIBUTION POPULUS-DELTOIDES PLANTING PATTERN DECIDUOUS FOREST MARKET QUALITY
DOI	10.1007/s11707-014-0446-7
英文摘要	The canopy light extinction coefficient (K) is a key factor in affecting ecosystem carbon, water, and energy processes. However, K is assumed as a constant in most biogeochemical models owing to lack of in-site measurements at diverse terrestrial ecosystems. In this study, by compiling data of K measured at 88 terrestrial ecosystems, we investigated the spatiotemporal variations of this index across main ecosystem types, including grassland, cropland, shrubland, broadleaf forest, and needleleaf forest. Our results indicated that the average K of all biome types during whole growing season was 0.56. However, this value in the peak growing season was 0.49, indicating a certain degree of seasonal variation. In addition, large variations in K exist within and among the plant functional types. Cropland had the highest value of K (0.62), followed by broadleaf forest (0.59), shrubland (0.56), grassland (0.50), and needleleaf forest (0.45). No significant spatial correlation was found between K and the major environmental factors, i.e., mean annual precipitation, mean annual temperature, and leaf area index (LAI). Intra-annually, significant negative correlations between K and seasonal changes in LAI were found in the natural ecosystems. In cropland, however, the temporal relationship was site-specific. The ecosystem type specific values of K and its temporal relationship with LAI observed in this study may contribute to improved modeling of global biogeochemical cycles.; Geosciences, Multidisciplinary; SCI(E); 中国科学引文数据库(CSCD); 0; ARTICLE; huzm@igsnrr.ac.cn; fanjw@igsnrr.ac.cn; 4; 599-609; 8
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/387918]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Zhang, Liangxia,Hu, Zhongmin,Fan, Jiangwen,et al. A meta-analysis of the canopy light extinction coefficient in terrestrial ecosystems[J]. frontiers of earth science,2014.
APA	Zhang, Liangxia,Hu, Zhongmin,Fan, Jiangwen,Zhou, Decheng,&Tang, Fengpei.(2014).A meta-analysis of the canopy light extinction coefficient in terrestrial ecosystems.frontiers of earth science.
MLA	Zhang, Liangxia,et al."A meta-analysis of the canopy light extinction coefficient in terrestrial ecosystems".frontiers of earth science (2014).