A coherent project based on an integrated vision of agroecosystems and their functioning 

Our ambition is to understand the global changes at work in order to support transitions in agricultural production systems. The issues at stake include the management, preservation and restoration of natural resources, as well as the transition to food production for the benefit of human health and the environment. Our research is marked by a strong interdisciplinary approach, drawing on the complementarities between each of our two scientific teams: Sol&Tox and Eco&Phy. The unit boasts top-quality research infrastructures enabling it to carry out research on a wide range of spatial and temporal scales, from controlled and field experiments to advanced modeling. 

Measurements and observations of agroecosystems via dedicated research infrastructures   

Our research infrastructures are an important part of our identity and our recognition on a national and even European scale. Some of them are part of national infrastructures under the ICOS, ANAEE, ISC INRAE (SOERE-PRO, BiochemENV, PTR_MS) or regional labels (Patrimonial testing, Phaire, Toits Potagers, PHOCUS, Caract’Air). They are open to external collaborations and support numerous structuring projects where we seek synergies between experimental and modeling approaches. These infrastructures are ideal for improving metrology: gas flow measurements, analysis of organic contaminants in various matrices: air, soil, waste products, plants, soil organisms. To this end, the ECOSYS Quality Unit supports the development of skills in the traceability of measurement data and protocols, and the consistent use of standardized methods. v

Modeling & experimentation: from process to ecosystem

The unit develops biophysically-based models to understand complex processes associated with agroecosystem functions: organic matter decomposition and biogeochemical cycles, NH3 and VOC volatilization, growth of plant communities in mixed species or varieties, pathogen regulation, fate and effects of pollutants on soil organisms. A first level of modeling aims to understand the dependence of processes on local environmental conditions and their coupling in realistic situations: soil microhabitats, architecture of above- and below-ground plant systems, soil food webs. These approaches mobilize 2D-3D approaches based on high-resolution imaging techniques coupled with experiments under controlled conditions in the laboratory, in phytotrons or in the field using different analytical techniques (stable isotopy and mass spectrometry, high-resolution LC and GC_MS analyses, non-targeted analyses with PTR_MS, microcalorimetry, radioactive tracing for organic contaminants).

A second modeling objective involves integrating these processes at broader spatial and temporal scales - from plot to territory - to assess ecosystem services such as C storage, GHG emission reduction, air pollution and exposure to contaminants (NH3, pesticides, VOC precursors of fine particles), regulation of bio-aggressors in landscapes, nutrient flows and optimization of recycling of organic waste products in response to changes in agro-ecological practices in scenarios linked to changes in agri-food systems, the energy transition and the effects of climate change. 

Links between research and teaching

Diversified partnerships and a strong focus on local issues

Our research activities are embedded in society, and we have strong partnerships with non-academic players such as Veolia, GRDF and Vinci. Some partnerships are long-standing and have led to the development of practical tools such as the Ismo indicator (Indicateur de Stabilité de la Matière Organique, Afnor standard) and the EnVisaGES commercial service (Metys INRAE Transfert). They have led to major advances in the valorization of organic waste products. Today, ECOSYS is involved in local initiatives such as the Vivagrilab Living Lab, in the continuity of projects co-constructed with local associations such as Terres et Cités and the Association Plaine de Versailles, solutions for nitrogen recycling and alternative fertilization, in line with territorial dynamics and public policies (anti-waste law for a circular economy, Agec). Today, the unit is extending this type of collaboration to urban and peri-urban agriculture issues, as well as climate change resilience and air, soil and water quality (Ciffre contracts in progress).