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...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-11-01
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| Series: | Ecological Indicators |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1470160X21008335 |
| _version_ | 1819130064610000896 |
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| 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 |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-12-22T08:53:40Z |
| format | Article |
| id | doaj.art-6acf0ce867a1401dbbc99b63f5d98a25 |
| institution | Directory Open Access Journal |
| issn | 1470-160X |
| language | English |
| last_indexed | 2024-12-22T08:53:40Z |
| publishDate | 2021-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecological Indicators |
| spelling | doaj.art-6acf0ce867a1401dbbc99b63f5d98a252022-12-21T18:31:53ZengElsevierEcological Indicators1470-160X2021-11-01131108168Specific responses of canopy conductance to environmental factors in a coniferous plantation in subtropical ChinaMingjie Xu0Jie Hu1Tao Zhang2Huimin Wang3Xianjin Zhu4Jianlei Wang5Fengting Yang6Hui Zhang7Qianyu Wang8College of Agronomy, Shenyang Agricultural University, Shenyang 110866, China; Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, ChinaCollege of Agronomy, Shenyang Agricultural University, Shenyang 110866, ChinaCollege of Agronomy, Shenyang Agricultural University, Shenyang 110866, China; Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; Corresponding authors at: Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100190, China; Corresponding authors at: Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.College of Agronomy, Shenyang Agricultural University, Shenyang 110866, China; Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, ChinaNational Engineering Laboratory of Biohydrometallurgy, GRINM Resources and Environment Tech. Co, Ltd, Beijing 100088, ChinaKey Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, ChinaCollege of Agronomy, Shenyang Agricultural University, Shenyang 110866, China; Jinzhou Ecology and Agriculture Meteorological Center, Liaoning Meteorological Bureau, Jinzhou 121000, ChinaCollege of Agronomy, Shenyang Agricultural University, Shenyang 110866, ChinaUnderstanding 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.http://www.sciencedirect.com/science/article/pii/S1470160X21008335ForestFluxCanopy conductanceTemperatureVapor pressure deficit |
| spellingShingle | 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 Ecological Indicators Forest Flux Canopy conductance Temperature Vapor pressure deficit |
| title | 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_short | 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 |
| topic | Forest Flux Canopy conductance Temperature Vapor pressure deficit |
| url | http://www.sciencedirect.com/science/article/pii/S1470160X21008335 |
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