USIFlux
Financiado
Unveiling Stomata 24 7 Using Stable Isotopes and COS to quantify diurnal and no...
Unveiling Stomata 24 7 Using Stable Isotopes and COS to quantify diurnal and nocturnal carbon and water vegetation atmosphere Fluxes under future climate scenarios
Rising atmospheric CO2 concentration, increasing temperature and altered precipitation patterns dramatically impact the terrestrial biosphere with important consequences for all biogeochemical cycles. Predictions of carbon (C) and...
Rising atmospheric CO2 concentration, increasing temperature and altered precipitation patterns dramatically impact the terrestrial biosphere with important consequences for all biogeochemical cycles. Predictions of carbon (C) and water exchange between vegetation and the atmosphere require detailed mechanistic understanding of how plants control water loss and C gain through their stomatal pores. Currently, global circulation models incorporate formulations of stomatal conductance (gs) based on stomatal optimisation theory. However, these models ignore gs regulation: (1) during night time, despite clear evidence for significant nocturnal transpiration, (2) in non-vascular plants and (3) during leaf development and senescence. To reduce the uncertainty associated with current C and water fluxes in models, we need to incorporate robust predictions of gs in response to novel environmental conditions (higher temperature, decreased water availability and elevated CO2). To fill these gaps, USIFlux, will develop a novel tracing technique to measure gs during the dark, when fluxes are an order of magnitude smaller than during the day. To do so, we will combine measurements of COS (carbonyl sulphide) uptake with CO18O fluxes and changes in the oxygen isotope composition (δ18O) of water in leaves. We will relate the response of gs at night to changes in gs during the day and in response to drought and elevated CO2. These measurements will be coupled to an experiment to investigate stomatal regulation during leaf ontogeny and in different life forms. Here, we will challenge the stomatal optimisation theory in life forms lacking active stomatal control (mosses and brackens) and during leaf development, when leaf construction costs constrain the optimisation of C gain. Empirical formulations arising from these experiments will be incorporated into large-scale soil-vegetation-atmosphere transfer models to explore their impact at larger scales.
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Duración del proyecto: 37 meses
Fecha Inicio: 2015-02-23
Fecha Fin: 2018-03-31
Fecha Fin: 2018-03-31
Línea de financiación: concedida
El organismo H2020 notifico la concesión del proyecto el día 2018-03-31
Línea de financiación objetivo
El proyecto se financió a través de la siguiente ayuda:
MSCA-IF-2014-EF:
Marie Skłodowska-Curie Individual Fellowships (IF-EF)
Cerrada
hace 10 años
Presupuesto
El presupuesto total del proyecto asciende a
173K€
Líder del proyecto
INSTITUT NATIONAL DE RECHERCHE POUR LAGRICULT...
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Perfil tecnológico
TRL
4-5
Perfil tecnológico
TRL
4-5
417.70K€ |
Participante