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A meta-analysis of the canopy light extinction coefficient in terrestrial ecosystems
Zhang, Liangxia1,2; Hu, Zhongmin1; Fan, Jiangwen1; Zhou, Decheng3; Tang, Fengpei4
2014-12-01
Source PublicationFRONTIERS OF EARTH SCIENCE
Volume8Issue:4Pages:599-609
AbstractThe 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.
SubtypeArticle
KeywordCanopy Light Extinction Coefficient Ecological Modeling Biogeochemical Model Forest Grassland Cropland Leaf Area Index
WOS HeadingsScience & Technology ; Physical Sciences
WOS Subject ExtendedGeology
WOS KeywordRADIATION-USE EFFICIENCY ; LEAF-AREA INDEX ; DRY-MATTER ACCUMULATION ; NET PRIMARY PRODUCTION ; SEMIARID ENVIRONMENT ; ANGLE DISTRIBUTION ; POPULUS-DELTOIDES ; PLANTING PATTERN ; DECIDUOUS FOREST ; MARKET QUALITY
Indexed BySCI
Language英语
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000345389600014
PublisherSPRINGER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/68434
Collection中国科学院地理科学与资源研究所
Corresponding AuthorHu, Zhongmin
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
3.Peking Univ, Minist Educ, Key Lab Earth Surface Proc, Coll Urban & Environm Sci, Beijing 100871, Peoples R China
4.China Univ Min & Technol, Beijing 100083, Peoples R China
Recommended Citation
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,2014,8(4):599-609.
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,8(4),599-609.
MLA Zhang, Liangxia,et al."A meta-analysis of the canopy light extinction coefficient in terrestrial ecosystems".FRONTIERS OF EARTH SCIENCE 8.4(2014):599-609.
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