Testing transpiration rates of juvenile Aleppo pine trees using the heat ratio method under laboratory conditions
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Título: | Testing transpiration rates of juvenile Aleppo pine trees using the heat ratio method under laboratory conditions |
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Autor/es: | Sabater, Ana M. | Valiente, Jose Antonio | Bellot, Juan | Vilagrosa, Alberto |
Grupo/s de investigación o GITE: | Gestión de Ecosistemas y de la Biodiversidad (GEB) |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Ecología | CEAM (Centro Estudios Ambientales del Mediterráneo) | Universidad de Alicante. Instituto Multidisciplinar para el Estudio del Medio "Ramón Margalef" |
Palabras clave: | Ecohydrology | Heat ratio method | Mediterranean forest | Pine forest | Transpiration | Water balance |
Fecha de publicación: | 13-sep-2023 |
Editor: | John Wiley & Sons |
Cita bibliográfica: | Ecohydrology. 2023, 16(8): e2592. https://doi.org/10.1002/eco.2592 |
Resumen: | Tree transpiration considerably contributes to evaporative fluxes to the atmosphere in terrestrial ecosystems. Accurate transpiration quantification provides relevant information about forest water use and may benefit adaptive forest management, especially in a global change context. Tree transpiration can be measured by several methods, and sap flow measurements are one of the most valued. However, species-specific validations of these techniques are required to avoid undesirable bias. This is especially relevant in species with low transpiration rates where errors may be relevant, such as Aleppo pine trees (Pinus halepensis Mill.). Moreover, another significant source of uncertainty in sap flow measurements is probe misalignment. Hence, the aim of this study was to correlate transpiration rates estimated by sap flow probes using the heat ratio method (THRM) and load cells to independently monitor water transpiration in juvenile Aleppo pine trees. The corrections to improve transpiration measures, including misalignment correction, were applied to THRM results to test if the accuracy of results improved. These measurements were recorded in greenhouse under controlled conditions to implement different environmental conditions. The environmental variables that ruled the experiment, mainly vapour pressure deficit and soil water availability, spanned in a wide range of values. The results showed an accurate linear correspondence between TOBS and THRM for low and medium values, but moderate underestimations at high transpiration rates were observed. These underestimations were partly removed when applying probe misalignment correction. This study supports the notion that HRM offers accurate Aleppo pine transpiration estimations with low and medium values under a variety of abiotic conditions, which also has implications for HRM application in other isohydric species. The results also support the interest in the use of probe misalignment correction to estimate transpiration, mainly when high transpiration values are recorded. The results of this study can be considered as a preliminary approach for future research in order to improve the estimates of the transpiration rates of the Aleppo pine under the limiting conditions of the Mediterranean. |
Patrocinador/es: | This study was funded by the Spanish Ministry of Science, Innovation and Universities and the European Regional Development Fund through research projects “BLUEWATER-HYDROMED” (PID2019-111332RB-C21 MICINN/FEDER), “INERTIA_HYDROMED” (PID2019-111332RB-C22 MICINN/FEDER) and “VERSUS” (CGL2015-67466-R MICINN/FEDER), “IMAGINA– PROMETEOII/2019/110” funded by the Generalitat Valenciana. A.M. Sabater was supported by a European Social Fund and the Generalitat Valenciana with a PhD contract (ACIF/2018/279). The CEAM Foundation is supported by the Generalitat Valenciana (Spain). |
URI: | http://hdl.handle.net/10045/137169 |
ISSN: | 1936-0584 (Print) | 1936-0592 (Online) |
DOI: | 10.1002/eco.2592 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2023 The Authors. Ecohydrology published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1002/eco.2592 |
Aparece en las colecciones: | INV - GEB - Artículos de Revistas |
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