# Modélisation de l'exposition de la biodiversité aux produits Phytopharmaceutiques (PPP) a l'échelle du paysage

Quentin Devalloir, Raphaël Royauté, Carole Bedos, Olivier Crouzet, Colette Bertrand, Pierre-François Staub, David Crevoisier, Marc Voltz, Pierre Benoit, Cécile Dagès

► To cite this version:

Quentin Devalloir, Raphaël Royauté, Carole Bedos, Olivier Crouzet, Colette Bertrand, et al.. Modélisation de l'exposition de la biodiversité aux produits Phytopharmaceutiques (PPP) a l'échelle du paysage. Colloque annuel de la Société d'Écotoxicologie Fondamentale et Appliquée SEFA 2025, Jul 2025, La Roche Sur Yon, France. hal-05189661

HAL Id: hal-05189661

https://hal.inrae.fr/hal-05189661v1

Submitted on 28 Jul 2025

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# Modelling biodiversity exposure to phytopharmaceutical products (PPPs) at the landscape level

Quentin Devalloir(1,2), Raphaël Royauté(2), Carole Bedos(2), Olivier Crouzet(1), Colette Bertrand(2), Pierre-François Staub(1), David Crevoisier(3), Marc Voltz(3), Pierre Benoit(2), Cécile Dagès(3)

## Context:

* Current Environmental Risk Assessments (ERA) relies on a substance-by-substance approach at the field-plot scale

* This approach overlooks the cumulative risks posed by pesticide mixtures and the landscape-scale dispersion of contaminants over time

* European Partnership for next generation, systems-based Environmental Risk Assessment (PERA) aims to consider exposure of non-target organisms by combining the effects of multiple pesticides across landscapes and species' ecological traits and life stages [1]

* PERA can bridge the gap between current regulatory practices and the complex realities of pesticide use with the combination of fate and exposure modelling approaches [2]

## New approach methodologies: a combination of two models

* **Pesticide Fate Model (MIPP):** Simulates pesticide dispersion in air, soil, and water in vineyard agroecosystems, integrating landscape features like agricultural plots, soils, and water networks [3,4]

* **Ecological Model (IBM):** Cross-references species movement, habitat use, and feeding behavior with MIPP contamination patterns to assess the exposure to PPPs of non-target organisms and refine exposure scenarios

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* Combination of MIPP with IBM should improve exposure scenarios by considering the dynamic interactions between pesticide contamination and ecological traits

* This methodology strengthens pesticide exposure risk assessments for non-target organisms, in a real life context, supporting the goals of the PARC project

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OFB
OFFICE FRANÇAIS
DE LA BIODIVERSITÉ

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INRAO

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eco
sys