Comparison of two isotope-based methods used in determining forest evapotranspiration partitioning
A comprehensive understanding of the changing patterns and the contribution of each component of the forest ecosystem to evapotranspiration is necessary for an accurate assessment of biological quality, terrestrial ecosystem production, energy exchange, and water use efficiency. In this study, two m...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-06-01
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| Series: | Ecological Indicators |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1470160X22004083 |
| _version_ | 1818549946852311040 |
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| author | Xinlei Ren Jianbo Jia Yu Chen Yuwen Hu Yifan Wang Ruiqiao Wu Lei Hu |
| author_facet | Xinlei Ren Jianbo Jia Yu Chen Yuwen Hu Yifan Wang Ruiqiao Wu Lei Hu |
| author_sort | Xinlei Ren |
| collection | DOAJ |
| description | A comprehensive understanding of the changing patterns and the contribution of each component of the forest ecosystem to evapotranspiration is necessary for an accurate assessment of biological quality, terrestrial ecosystem production, energy exchange, and water use efficiency. In this study, two methods (i.e., the sap-flow and lysimeter methods) were used to partition evapotranspiration (ET) into evaporation(E) and transpiration(T) components using stable isotope techniques. The factors affecting the contribution of T to ET (FT) were evaluated. The results showed that FT presents seasonal variation patterns throughout the year. Both methods accurately simulated the ET partitioning and its seasonal variation. The ET value estimated by the sap-flow method was less than that estimated by the lysimeter method. In contrast, the simulated value of T calculated using the lysimeter method was higher than that calculated by the sap-flow method. However, this was within allowable limits. The lysimeter method is more accurate and suitable for monitoring forest ecosystem evapotranspiration in practical experiments. This study provides a technical reference for the optimal calculation method of ET partitioning using a stable isotope-based technique. It provides baseline information to better understand water vapour exchange in forest ecosystems in China. |
| first_indexed | 2024-12-12T08:39:54Z |
| format | Article |
| id | doaj.art-92f36d0b256141f580d6a305d815fb81 |
| institution | Directory Open Access Journal |
| issn | 1470-160X |
| language | English |
| last_indexed | 2024-12-12T08:39:54Z |
| publishDate | 2022-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecological Indicators |
| spelling | doaj.art-92f36d0b256141f580d6a305d815fb812022-12-22T00:30:49ZengElsevierEcological Indicators1470-160X2022-06-01139108937Comparison of two isotope-based methods used in determining forest evapotranspiration partitioningXinlei Ren0Jianbo Jia1Yu Chen2Yuwen Hu3Yifan Wang4Ruiqiao Wu5Lei Hu6Central South University of Forestry ＆ Technology, Changsha 410004, Hunan, China; Key Laboratory of Soil and Water Conservation and Desertification Combating, Ministry of Education, Changsha 410004, Hunan, ChinaCentral South University of Forestry ＆ Technology, Changsha 410004, Hunan, China; National Engineering Laboratory of Applied Technology for Forestry & Ecology in Southern China, Changsha 410004, Hunan, China; Hunan Lutou Forest Ecosystem National Orientation Observation and Research Station, Yueyang 414000, Hunan, China; Key Laboratory of Soil and Water Conservation and Desertification Combating, Ministry of Education, Changsha 410004, Hunan, China; Corresponding author at: Central South University of Forestry ＆ Technology, Changsha 410004, Hunan, China.Central South University of Forestry ＆ Technology, Changsha 410004, Hunan, China; Key Laboratory of Soil and Water Conservation and Desertification Combating, Ministry of Education, Changsha 410004, Hunan, ChinaCentral South University of Forestry ＆ Technology, Changsha 410004, Hunan, China; Key Laboratory of Soil and Water Conservation and Desertification Combating, Ministry of Education, Changsha 410004, Hunan, ChinaCentral South University of Forestry ＆ Technology, Changsha 410004, Hunan, China; National Engineering Laboratory of Applied Technology for Forestry & Ecology in Southern China, Changsha 410004, Hunan, China; Hunan Lutou Forest Ecosystem National Orientation Observation and Research Station, Yueyang 414000, Hunan, ChinaCentral South University of Forestry ＆ Technology, Changsha 410004, Hunan, China; National Engineering Laboratory of Applied Technology for Forestry & Ecology in Southern China, Changsha 410004, Hunan, China; Hunan Lutou Forest Ecosystem National Orientation Observation and Research Station, Yueyang 414000, Hunan, ChinaCentral South University of Forestry ＆ Technology, Changsha 410004, Hunan, China; National Engineering Laboratory of Applied Technology for Forestry & Ecology in Southern China, Changsha 410004, Hunan, China; Hunan Lutou Forest Ecosystem National Orientation Observation and Research Station, Yueyang 414000, Hunan, ChinaA comprehensive understanding of the changing patterns and the contribution of each component of the forest ecosystem to evapotranspiration is necessary for an accurate assessment of biological quality, terrestrial ecosystem production, energy exchange, and water use efficiency. In this study, two methods (i.e., the sap-flow and lysimeter methods) were used to partition evapotranspiration (ET) into evaporation(E) and transpiration(T) components using stable isotope techniques. The factors affecting the contribution of T to ET (FT) were evaluated. The results showed that FT presents seasonal variation patterns throughout the year. Both methods accurately simulated the ET partitioning and its seasonal variation. The ET value estimated by the sap-flow method was less than that estimated by the lysimeter method. In contrast, the simulated value of T calculated using the lysimeter method was higher than that calculated by the sap-flow method. However, this was within allowable limits. The lysimeter method is more accurate and suitable for monitoring forest ecosystem evapotranspiration in practical experiments. This study provides a technical reference for the optimal calculation method of ET partitioning using a stable isotope-based technique. It provides baseline information to better understand water vapour exchange in forest ecosystems in China.http://www.sciencedirect.com/science/article/pii/S1470160X22004083Stable isotopeEvapotranspirationLysimeterSap-flow |
| spellingShingle | Xinlei Ren Jianbo Jia Yu Chen Yuwen Hu Yifan Wang Ruiqiao Wu Lei Hu Comparison of two isotope-based methods used in determining forest evapotranspiration partitioning Ecological Indicators Stable isotope Evapotranspiration Lysimeter Sap-flow |
| title | Comparison of two isotope-based methods used in determining forest evapotranspiration partitioning |
| title_full | Comparison of two isotope-based methods used in determining forest evapotranspiration partitioning |
| title_fullStr | Comparison of two isotope-based methods used in determining forest evapotranspiration partitioning |
| title_full_unstemmed | Comparison of two isotope-based methods used in determining forest evapotranspiration partitioning |
| title_short | Comparison of two isotope-based methods used in determining forest evapotranspiration partitioning |
| title_sort | comparison of two isotope based methods used in determining forest evapotranspiration partitioning |
| topic | Stable isotope Evapotranspiration Lysimeter Sap-flow |
| url | http://www.sciencedirect.com/science/article/pii/S1470160X22004083 |
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