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Specific responses of canopy conductance to environmental factors in a coniferous plantation in subtropical China
Xu, Mingjie1,2; Hu, Jie1; Zhang, Tao1,2; Wang, Huimin2,3; Zhu, Xianjin1,2; Wang, Jianlei4; Yang, Fengting2; Zhang, Hui1,5; Wang, Qianyu1
2021-11-01
Source PublicationECOLOGICAL INDICATORS
ISSN1470-160X
Volume131Pages:11
Corresponding AuthorZhang, Tao(zhangt@syau.edu.cn) ; Wang, Huimin(wanghm@igsnrr.ac.cn)
AbstractUnderstanding the responses of canopy conductance (gc) to environmental factors would help ecologists to obtain further insight into the carbon and water exchange processes and forecast future changes in ecosystems under global climate change. Therefore, we investigated the seasonal and interannual variations in the gc based on 12 years of flux data that were observed by an eddy covariance system in a subtropical coniferous forest. Furthermore, by teasing out the dominant factors step by step, the specific gc responses to environmental factors were clarified, and the divergent responses in contrasting climatic years were determined. The multiyear mean gc was 3.46 +/- 0.36 mm.s(-1), and the gc peaked in April and declined to a minimum in October in most years. The vapor pressure deficit (VPD) was the most important factor that inhibited the gc, and the gc decreased sharply when the VPDs were greater than 1.8 kPa. Without high VPD stress, the gc increased linearly with air temperature (Ta) when the Ta was below 27 degrees C, after which it decreased. When the high VPD and Ta stresses were excluded, the gc increased with the net radiation (Rn) following a logistic growth model. The gc increased logarithmically with the soil water content at 5 cm depth (SWC5). The effects of the soil water content at 50 cm depth (SWC50) emerged under water stress or temperature stress conditions, which indicated that the forest utilized deep soil water to defend against environmental stress. Additionally, divergent responses of the gc to environmental factors in different climatic years were found. The results of this study provide detailed information on the gc variations and their specific responses to the environmental factors, which would improve the understanding of gc and help accurately estimate gc.
KeywordForest Flux Canopy conductance Temperature Vapor pressure deficit
DOI10.1016/j.ecolind.2021.108168
WOS KeywordSTOMATAL CONDUCTANCE ; SOIL-MOISTURE ; STAND TRANSPIRATION ; TREE TRANSPIRATION ; EDDY COVARIANCE ; ECOSYSTEM WATER ; RIVER-BASIN ; SCOTS PINE ; FOREST ; TEMPERATURE
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[42175141] ; National Natural Science Foundation of China[31500360] ; National Natural Science Foundation of China[32071585] ; China Postdoctoral Science Foundation[2021M692230]
Funding OrganizationNational Natural Science Foundation of China ; China Postdoctoral Science Foundation
WOS Research AreaBiodiversity & Conservation ; Environmental Sciences & Ecology
WOS SubjectBiodiversity Conservation ; Environmental Sciences
WOS IDWOS:000703760800004
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/165916
Collection中国科学院地理科学与资源研究所
Corresponding AuthorZhang, Tao; Wang, Huimin
Affiliation1.Shenyang Agr Univ, Coll Agron, Shenyang 110866, Peoples R China
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China
4.GRINM Resources & Environm Tech Co Ltd, Natl Engn Lab Biohydromet, Beijing 100088, Peoples R China
5.Liaoning Meteorol Bur, Jinzhou Ecol & Agr Meteorol Ctr, Jinzhou 121000, Peoples R China
Recommended Citation
GB/T 7714
Xu, Mingjie,Hu, Jie,Zhang, Tao,et al. Specific responses of canopy conductance to environmental factors in a coniferous plantation in subtropical China[J]. ECOLOGICAL INDICATORS,2021,131:11.
APA Xu, Mingjie.,Hu, Jie.,Zhang, Tao.,Wang, Huimin.,Zhu, Xianjin.,...&Wang, Qianyu.(2021).Specific responses of canopy conductance to environmental factors in a coniferous plantation in subtropical China.ECOLOGICAL INDICATORS,131,11.
MLA Xu, Mingjie,et al."Specific responses of canopy conductance to environmental factors in a coniferous plantation in subtropical China".ECOLOGICAL INDICATORS 131(2021):11.
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