Specific responses of canopy conductance to environmental factors in a coniferous plantation in subtropical China

Understanding 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...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Mingjie Xu, Jie Hu, Tao Zhang, Huimin Wang, Xianjin Zhu, Jianlei Wang, Fengting Yang, Hui Zhang, Qianyu Wang
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Forest Flux Canopy conductance Temperature Vapor pressure deficit Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/6acf0ce867a1401dbbc99b63f5d98a25
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:6acf0ce867a1401dbbc99b63f5d98a25
record_format	dspace
spelling	oai:doaj.org-article:6acf0ce867a1401dbbc99b63f5d98a252021-12-01T04:59:56ZSpecific responses of canopy conductance to environmental factors in a coniferous plantation in subtropical China1470-160X10.1016/j.ecolind.2021.108168https://doaj.org/article/6acf0ce867a1401dbbc99b63f5d98a252021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X21008335https://doaj.org/toc/1470-160XUnderstanding 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 °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.Mingjie XuJie HuTao ZhangHuimin WangXianjin ZhuJianlei WangFengting YangHui ZhangQianyu WangElsevierarticleForestFluxCanopy conductanceTemperatureVapor pressure deficitEcologyQH540-549.5ENEcological Indicators, Vol 131, Iss , Pp 108168- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Forest Flux Canopy conductance Temperature Vapor pressure deficit Ecology QH540-549.5
spellingShingle	Forest Flux Canopy conductance Temperature Vapor pressure deficit Ecology QH540-549.5 Mingjie Xu Jie Hu Tao Zhang Huimin Wang Xianjin Zhu Jianlei Wang Fengting Yang Hui Zhang Qianyu Wang Specific responses of canopy conductance to environmental factors in a coniferous plantation in subtropical China
description	Understanding 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 °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.
format	article
author	Mingjie Xu Jie Hu Tao Zhang Huimin Wang Xianjin Zhu Jianlei Wang Fengting Yang Hui Zhang Qianyu Wang
author_facet	Mingjie Xu Jie Hu Tao Zhang Huimin Wang Xianjin Zhu Jianlei Wang Fengting Yang Hui Zhang Qianyu Wang
author_sort	Mingjie Xu
title	Specific responses of canopy conductance to environmental factors in a coniferous plantation in subtropical China
title_short	Specific responses of canopy conductance to environmental factors in a coniferous plantation in subtropical China
title_full	Specific responses of canopy conductance to environmental factors in a coniferous plantation in subtropical China
title_fullStr	Specific responses of canopy conductance to environmental factors in a coniferous plantation in subtropical China
title_full_unstemmed	Specific responses of canopy conductance to environmental factors in a coniferous plantation in subtropical China
title_sort	specific responses of canopy conductance to environmental factors in a coniferous plantation in subtropical china
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/6acf0ce867a1401dbbc99b63f5d98a25
work_keys_str_mv	AT mingjiexu specificresponsesofcanopyconductancetoenvironmentalfactorsinaconiferousplantationinsubtropicalchina AT jiehu specificresponsesofcanopyconductancetoenvironmentalfactorsinaconiferousplantationinsubtropicalchina AT taozhang specificresponsesofcanopyconductancetoenvironmentalfactorsinaconiferousplantationinsubtropicalchina AT huiminwang specificresponsesofcanopyconductancetoenvironmentalfactorsinaconiferousplantationinsubtropicalchina AT xianjinzhu specificresponsesofcanopyconductancetoenvironmentalfactorsinaconiferousplantationinsubtropicalchina AT jianleiwang specificresponsesofcanopyconductancetoenvironmentalfactorsinaconiferousplantationinsubtropicalchina AT fengtingyang specificresponsesofcanopyconductancetoenvironmentalfactorsinaconiferousplantationinsubtropicalchina AT huizhang specificresponsesofcanopyconductancetoenvironmentalfactorsinaconiferousplantationinsubtropicalchina AT qianyuwang specificresponsesofcanopyconductancetoenvironmentalfactorsinaconiferousplantationinsubtropicalchina
_version_	1718405606243565568

Specific responses of canopy conductance to environmental factors in a coniferous plantation in subtropical China

Ejemplares similares