Processes driving nocturnal transpiration and implications for estimating land evapotranspiration
Evapotranspiration is a major component of the water cycle, yet only daytime transpiration is currently considered in Earth system and agricultural sciences. This contrasts with physiological studies where 25% or more of water losses have been reported to occur occurring overnight at leaf and plant...
| Authors: | ; ; ; ; ; ; |
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| Format: | Article |
| Status: | Published version |
| Publication date: | 2015 |
| Country: | España |
| Institution: | Universitat de Lleida (UdL) |
| Repository: | Repositori Obert UdL |
| OAI Identifier: | oai:repositori.udl.cat:10459.1/48672 |
| Online Access: | https://doi.org/10.1038/srep10975 http://hdl.handle.net/10459.1/48672 |
| Access Level: | Open access |
| Keyword: | Stomatal conductance Water-use Sap flow Photosynthesis Plants Aigua -- Utilització Fotosíntesi Plantes -- Absorció de l'aigua |
| _version_ | 1878738336892321792 |
|---|---|
| author | Resco de Dios, Víctor |
| author2 | Roy, Jacques Ferrio Díaz, Juan Pedro Alday, Josu G. Landais, Damien Mileu, Alexandru Gessler, Arthur |
| author2_role | author author author author author author |
| author_browse | Alday, Josu G. Ferrio Díaz, Juan Pedro Gessler, Arthur Landais, Damien Mileu, Alexandru Resco de Dios, Víctor Roy, Jacques |
| author_facet | Resco de Dios, Víctor Roy, Jacques Ferrio Díaz, Juan Pedro Alday, Josu G. Landais, Damien Mileu, Alexandru Gessler, Arthur |
| author_role | author |
| collection | Repositori Obert UdL |
| description | Evapotranspiration is a major component of the water cycle, yet only daytime transpiration is currently considered in Earth system and agricultural sciences. This contrasts with physiological studies where 25% or more of water losses have been reported to occur occurring overnight at leaf and plant scales. This gap probably arose from limitations in techniques to measure nocturnal water fluxes at ecosystem scales, a gap we bridge here by using lysimeters under controlled environmental conditions. The magnitude of the nocturnal water losses (12-23% of daytime water losses) in rowcrop monocultures of bean (annual herb) and cotton (woody shrub) would be globally an order of magnitude higher than documented responses of global evapotranspiration to climate change (51-98 vs. 7-8 mm yr(-1)). Contrary to daytime responses and to conventional wisdom, nocturnal transpiration was not affected by previous radiation loads or carbon uptake, and showed a temporal pattern independent of vapour pressure deficit or temperature, because of endogenous controls on stomatal conductance via circadian regulation. Our results have important implications from largescale ecosystem modelling to crop production: homeostatic water losses justify simple empirical predictive functions, and circadian controls show a fine-tune control that minimizes water loss while potentially increasing posterior carbon uptake. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | ES_ad55ca1bf7d30144f8a8a20047565a45 |
| institution | Universitat de Lleida (UdL) |
| instname_str | Universitat de Lleida (UdL) |
| network_acronym_str | ES |
| network_name_str | España |
| oai_identifier_str | oai:repositori.udl.cat:10459.1/48672 |
| publishDate | 2015 |
| publishDateSort | 2015 |
| publisher | Nature publishing group |
| publisherStr | Nature publishing group |
| reponame_str | Repositori Obert UdL |
| spelling | Processes driving nocturnal transpiration and implications for estimating land evapotranspiration Resco de Dios, Víctor Roy, Jacques Ferrio Díaz, Juan Pedro Alday, Josu G. Landais, Damien Mileu, Alexandru Gessler, Arthur Stomatal conductance Water-use Sap flow Photosynthesis Plants Aigua -- Utilització Fotosíntesi Plantes -- Absorció de l'aigua Evapotranspiration is a major component of the water cycle, yet only daytime transpiration is currently considered in Earth system and agricultural sciences. This contrasts with physiological studies where 25% or more of water losses have been reported to occur occurring overnight at leaf and plant scales. This gap probably arose from limitations in techniques to measure nocturnal water fluxes at ecosystem scales, a gap we bridge here by using lysimeters under controlled environmental conditions. The magnitude of the nocturnal water losses (12-23% of daytime water losses) in rowcrop monocultures of bean (annual herb) and cotton (woody shrub) would be globally an order of magnitude higher than documented responses of global evapotranspiration to climate change (51-98 vs. 7-8 mm yr(-1)). Contrary to daytime responses and to conventional wisdom, nocturnal transpiration was not affected by previous radiation loads or carbon uptake, and showed a temporal pattern independent of vapour pressure deficit or temperature, because of endogenous controls on stomatal conductance via circadian regulation. Our results have important implications from largescale ecosystem modelling to crop production: homeostatic water losses justify simple empirical predictive functions, and circadian controls show a fine-tune control that minimizes water loss while potentially increasing posterior carbon uptake. This study benefited from the CNRS human and technical resources allocated to the ECOTRONS Research Infrastructures as well as from the state allocation ‘Investissement d’Avenir’ ANR-11-INBS-0001, ExpeER FP7 Transnational Access program, Ramón y Cajal fellowships (RYC-2012-10970 to VRD and RYC-2008-02050 to JPF), the Erasmus Mundus Master Course Mediterranean Forestry and Natural Resources Management (MEDfOR) and internal grants from UWS-HIE to VRD and ZALF to AG. Nature publishing group https://doi.org/10.1038/srep10975 http://hdl.handle.net/10459.1/48672 |
| spellingShingle | Processes driving nocturnal transpiration and implications for estimating land evapotranspiration Resco de Dios, Víctor Stomatal conductance Water-use Sap flow Photosynthesis Plants Aigua -- Utilització Fotosíntesi Plantes -- Absorció de l'aigua |
| status_str | publishedVersion |
| title | Processes driving nocturnal transpiration and implications for estimating land evapotranspiration |
| title_full | Processes driving nocturnal transpiration and implications for estimating land evapotranspiration |
| title_fullStr | Processes driving nocturnal transpiration and implications for estimating land evapotranspiration |
| title_full_unstemmed | Processes driving nocturnal transpiration and implications for estimating land evapotranspiration |
| title_short | Processes driving nocturnal transpiration and implications for estimating land evapotranspiration |
| title_sort | Processes driving nocturnal transpiration and implications for estimating land evapotranspiration |
| topic | Stomatal conductance Water-use Sap flow Photosynthesis Plants Aigua -- Utilització Fotosíntesi Plantes -- Absorció de l'aigua |
| topic_facet | Stomatal conductance Water-use Sap flow Photosynthesis Plants Aigua -- Utilització Fotosíntesi Plantes -- Absorció de l'aigua |
| url | https://doi.org/10.1038/srep10975 http://hdl.handle.net/10459.1/48672 |