Synchronisms and antagonisms in the relationships between agricultural environment, biodiversity and ecological functions in a constructed wetland - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Conference Papers Year : 2023

Synchronisms and antagonisms in the relationships between agricultural environment, biodiversity and ecological functions in a constructed wetland

Synchronismes et antagonismes dans les relations entre environnement agricole, biodiversité et fonctions écologiques dans une zone tampon humide artificielle

Abstract

Pesticides are present in air, water, soil and biota at concentrations sometimes higher than quality standards, proposed for protecting the environment and wildlife. In agricultural landscapes, constructed wetlands, as nature-based solutions, enable the depollution of water contaminated with nitrates and pesticides through natural processes. However, such artificial ecosystems can also act as contaminant reservoirs likely to affect biodiversity. The site making the object of this study is the constructed wetland of Rampillon (CWR, Northeast of France, Brie region) which was constructed to collect water from a 355 ha subsurface drained catchment under intensive agricultural practices. Since 2012, the site is instrumented to monitor continuously physicochemical parameters and pesticides concentrations. In addition, faunistic inventories are frequently performed within the CWR. This work aims at determining whether the CWR is viable for the aquatic wildlife and associated ecological functions through a multi -taxa, -scale, -response approach. The focus is on amphibians and benthic macroinvertebrates. The first results show: (i) concordances between period of high biological activity in amphibians and macroinvertebrates and high pesticide exposure levels, and (ii) spatial variations in litter breakdown between upstream and downstream of the CWR in relation with pesticide concentrations. In addition, biochemical and morphological biomarkers are studied in amphibians to assess their health status and to determine whether pesticides are responsible for the observed effects.
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Dates and versions

hal-04186401 , version 1 (23-08-2023)

Identifiers

  • HAL Id : hal-04186401 , version 1

Cite

Alexandre Michel, Alienor Jeliazkov, Jérémie D. Lebrun, Cédric Chaumont, Virginie Archaimbault, et al.. Synchronisms and antagonisms in the relationships between agricultural environment, biodiversity and ecological functions in a constructed wetland. SEFS 13 - Symposium for European Freshwater Sciences, Freshwater Biological Association (FBA), Jun 2023, New Castle Upon Tyne, United Kingdom. ⟨hal-04186401⟩
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