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24, chemin de Borde Rouge –Auzeville – CS52627
31326 Castanet Tolosan CEDEX - France

Dernière mise à jour : Mai 2018

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Title and manager
Executive Summary

Study of the regulation mechanisms of carbonic anhydrase and COS and CO18O fluxes in terrestrial ecosystems.

Coordinator :
Jérôme OGEE




Quantifying CO2 budgets and predicting the sensitivity of ecosystems to climate change requires the ability to estimate photosynthesis and respiration flows on a large spatial scale. Currently, these estimates are uncertain and mainly the result of models. We propose here a multi-track approach to constrain our estimates of photosynthesis and respiration on a large scale and better represent these processes in vegetation models.


Response of the tree to strong winds.

Coordinator :




The TWIST project proposes to better understand the mechanical root-soil interaction and the role of soil moisture and fatigue on tree uplift resistance during storms. The first objective of the TWIST project is to estimate the effects of soil conditions on tree stability, including the level of soil water saturation during storm events. The second objective is to establish a tree-scale method for predicting the occurrence of tree ruin by uprooting based on microclimatic conditions. TWIST's third objective is to provide a simplified leeward uplift model that includes the knowledge acquired through our mechanistic approach.


Modeling for the support of actors towards the adaptation of perennial or agroforestry cover to global changes.

ISPA correspondents: Denis LOUSTAU and
Jean-Christophe DOMEC




Each agroecosystem is defined by a range of temperatures and resources beyond which it is no longer viable and should be replaced or adapted through management. Some practices can increase resilience: the creation of heterogeneity) and diversity in perennial plantations can improve the microclimate, the facilitation effects for resource capture, the provision of ecosystem services. Our hypothesis is that some multi-layer systems such as agroforestry are inherently more resilient and can inspire other systems for short-term adaptation. MACACC brings together economists, actors, climatologists, ecophysiologists and modelers to discuss the adaptation of their sustainable plantations to global changes.


Management and risk analysis of an invasive plant (Ulex europaeus): contribution of modelling the ecological niche and population dynamics of the species along a climatic gradient.

Coordinator :




The MARIS project aims to provide a new framework for managing the risks associated with biological invasions in a sustainable way. It is based on the use of a model species, Ulex europaeus (L.), a globally invasive species outside its European native range. We study this species in a wide range of ecological and sociological conditions both in native areas (Brittany and Landes de Gascogne) and in invaded areas (Reunion Island, New Zealand, the Canary Islands). This project combines an ecological component, focused on three target phases for the control of the population dynamics of the species: regeneration, persistence and dispersion, a sociological component on the analysis of the perceptions and uses of the species and a global analysis of the results of the project.


Cadmium and Deoxynivalenol in durum wheat grains: understanding co-contamination and associated toxicity.

ISPA Correspondent: Christophe NGUYEN




The objective of the CaDON project is to understand the origin and consequences of co-contamination of crops with trace elements (cadmium) and mycotoxins (DON).
CaDON aims to investigate i) whether the occurrence of Cd and DON in harvested grains is correlated due to common factors for contamination in the field or due to the physiology of the plant and fungus, ii) whether or not the grinding processes promote the co-occurrence of DON and Cd over the localization of contaminants in grain tissues, iii) whether the toxic effects of Cd and DON on mammalian cells are additive, synergistic or antagonistic.


Wind erosion in the presence of sparse vegetation.

Coordinator :
Sylvain DUPONT




WIND-O-V proposes to develop a new generation of erosion models that predict the amount and composition of dust emitted from scattered bare and vegetated surfaces, typical of semi-arid regions. To do this, WIND-O-V relies on an original model of wind erosion of vegetated surfaces, from the local to the region, using the most advanced wind models. This will make it possible (1) to quantify erosion and soil fertility loss as a function of vegetation and wind, (2) to deduce an optimal crop organization for sustainable soil management, and (3) to improve the emission patterns of regional dust dispersion models.


Diversity and Productivity of forests impacted by Climate Change.

ISPA Correspondent: Laurent AUGUSTO




The main objective of the project is to quantify the effect of tree species diversity on forest productivity stability, taking into account both the resistance and resilience of mixed forests to climatic factors (drought and temperature). Another important objective is to deepen the understanding of the underlying ecological mechanisms, addressing the links between overhead and underground processes.

Projets Européens



Titre et Responsable




Identifying the drivers of carbonic anhydrase activity in soils and its impact on soil-atmosphere exchanges of CO18O and COS, two complementary tracers of the global carbon cycle

Coordinatrice :


2014 -2019

The overall goal of SOLCA is to quantify and understand better the environmental and ecological causes behind the spatial and seasonal variability in carbonic anhydrase activity observed in soils from different biomes. As a result of this project we will be able to construct the necessary theoretical and modelling framework for using CO18O, CO17O and COS as additional tracers of global CO2 gross fluxes. This ground-breaking achievement will lead to a revised and well-constrained estimate of the past and present (1977-2015) photosynthetic uptake of the terrestrial biosphere at the global scale.

Project Marie Curie Fellowship


Studying stomatal conductance 24-7: a multi-tracer approach

Coordinatrice :


2016 -2018

The overall objective of the project is to improve our understanding of stomatal regulation in the dark, across plant functional types, over leaf ontogeny and in response to drought and rising CO2. The specific objectives of the project develop a multi-tracer approach to quantify nocturnal stomatal conductance, study its variations amongst life forms, during ontogeny and in response to water limitations.

Projets Investissement d’Avenir 





Titre et Responsable




Forecasting changes in microclimate and microbial diversity within tree canopies under climate change scenarios

Correspondant ISPA :

2017 – 2019

Micro-organisms living within tree canopies experience microclimates that are highly variable in both space and time. The aim of this project is to understand better how microclimatic heterogeneity and microbial diversity are linked within tree canopies and how this can affect leaf function. Metagenomics and state-of-the-art techniques in microclimate measurements will be compared to microclimate simulations from the canopy SVAT model MuSICA and used to explore how microbial and plant function varies spatially within the canoy and over the growing season.


Ecohydrological relations of a Fagus sylvatica refugial population

Correspondant ISPA :
Jérôme OGEE

2017 – 2019

The project HydroBeech will investigate the ecohydrological and ecophysiological mechanisms operating in an emblematic refugial population of beech (Fagus sylvatica L.) trees in the Ciron river gorge in SW France. We will combine high-resolution microclimate and stable isotope data in water pools and tree-ring cellulose with state-of-the-art, isotope-enabled ecophysiological and micrometeorological models. The knowledge gained within HydroBeech will be highly relevant for predicting the performance of refugial forest tree populations under a warmer climate and for developing adequate climate mitigation strategies.


Collaborative platform for contaminant analysis

ISPA correspondent :
Laurence DENAIX


Creation of a collaborative platform on the QUASAPROVE network for agricultural education

Projets Région Nouvelle Aquitaine





Titre et Responsable




Mitigation of the effects of climate change on biodiversity and ecosystem services in the Aquitaine forests

ISPA correspondent :


2017 – 2020

We will develop techniques to measure and monitor how the climate of the Ciron catchment is regulated by the river and how microclimatic heterogeneity and microbial diversity are linked within tree canopies and how this can affect the decomposition of leaf material in the river. State-of-the-art techniques in microclimate measurements will be developed and deployed in the beautiful Ciron catchment. In addition we will develop drone technology to measure the spatial variability of riparian forest canopy temperatures and phenology and link this to simulations of carbon, water and energy transfer between the canopy and the atmosphere using the SVAT model MuSICA over the growing season.