Auteurs, date et publication :
Auteurs C.N. Legind , A. Rein , J. Serre , V. Brochier , C.S. Haudin , P. Cambier , S. Houot , S. Trapp
Publication : Plos One
Date : 2025
Volume : 7
Issue : 10 - article no e47002
Pages : 13 p.
Catégorie(s)
#INRAE #PRO #PRO QualiAgroAuteurs, date et publication :
Auteurs Benoît Sotton , Alain Devaux , Nicolas Givaudan , Jean Guillard , Isabelle Domaizon , Sylvie Bony , Orlane Anneville
Publication : Ecotoxicology
Date : 2025
Volume : 21
Issue : 7
Pages : 1788-1796
Catégorie(s)
#INRAE #OLAAuteurs, date et publication :
Auteurs Matthias Emmrich , Ian J. Winfield , Jean Guillard , Atle Rustadbakken , Charlotte Vergès , Pietro Volta , Erik Jeppesen , Torben L. Lauridsen , Sandra Brucet , Kerstin Holmgren , Christine Argillier , Thomas Mehner
Publication : Freshwater Biology
Date : 2025
Volume : 57
Issue : 12
Pages : 2436-2448
Catégorie(s)
#INRAE #OLARésumé
Mixture risk assessment predictions have rarely been confronted with biological changes observed in the environment. In this study, long-term monitoring of a European great lake, Lake Geneva, provides the opportunity to assess to what extent the predicted toxicity of herbicide mixtures explains the changes in the composition of the phytoplankton community next to other classical limnology parameters such as nutrients. To reach this goal, the gradient of the mixture toxicity of 14 herbicides regularly detected in the lake was calculated using concentration addition and response addition models. A temporal gradient of toxicity was observed which decreased from 2004 to 2009. Redundancy analysis and partial redundancy analysis showed that this gradient explains a significant portion of the variation in phytoplankton community composition with and without having removed the effect of all other covariables. Moreover, species that are significantly influenced, positively or negatively, by the decrease of toxicity in the lake over time are highlighted. It can be concluded that the herbicide mixture toxicity is one of the key parameters to explain phytoplankton changes in Lake Geneva.
Auteurs, date et publication :
Auteurs Vincent Gregorio , Lucie Büchi , Orlane Anneville , Frédéric Rimet , Agnès Bouchez , Nathalie Chèvre
Publication : Ecotoxicology
Date : 2025
Volume : 21
Issue : 8
Pages : 2306-2318
Catégorie(s)
#INRAE #OLARésumé
An experimental site was set up in northeast France on a Luvisol (ruptic) soil to examine the duration of physical, chemical and biological disturbances in the soil following mechanized forest harvesting. Soil carbon dioxide (CO2) efflux (SE) and concentration ([CO2]) in the silt loam layer (050 cm) were measured from March 2008 to March 2010 in the trafficked (T) and control (C) plots of this site. This study aimed to validate these two measurements as indicators for long-term soil monitoring following disturbance by heavy traffic in 2007. Throughout the sampling period, SE in the T-treatment was significantly reduced relative to that in the C-treatment. The response of [CO2] to traffic depended on the season; it decreased during summer and increased during winter and spring. The combination of the two measurements indicated an increase in the frequency and duration of anoxic conditions resulting from poor gas diffusion after heavy forest traffic. The relationships between soil climatic properties (temperature, water content and water table level) on one hand and SE or [CO2] on the other, demonstrated a strong control of SE by soil biological activity and a double control of [CO2] by gas production/consumption and gas transfer. Our findings suggest that [CO2] and SE are sensitive to soil degradation by forest harvesting and that the impact of soil compaction provides complementary information on the processes involved in regulating CO2 production and efflux. However, their use as simple indicators is questionable as the impact varied with time and was probably dependent on the soil type.
Auteurs, date et publication :
Auteurs N. Goutal , F. Parent , P. Bonnaud , J. Demaison , G. Nourrisson , D. Epron , J. Ranger
Publication : European Journal of Soil Science
Date : 2012
Volume : 63
Issue : 2
Pages : 261-271
Catégorie(s)
#FORET Azerailles-Clermont #INRAEAuteurs, date et publication :
Auteurs Lise Thouvenot , Jacques Haury , Gabrielle Thiébaut
Publication : Hydrobiologia
Date : 2012
Volume : 686
Issue : 1
Pages : 213-223
Catégorie(s)
#INRAE #PEARLAuteurs, date et publication :
Auteurs Yannick Bayona , Marc Roucaute , Kevin Cailleaud , Anne Bassères , Laurent Lagadic , Thierry Caquet
Date : 2012
Catégorie(s)
#INRAE #PEARLAuteurs, date et publication :
Auteurs Arnaud Auber , Arnaud Giusti , Thierry Caquet , B. Réal , N. Surdyk , I. Dubus , Anne Togola , Didier Azam , Laurent Lagadic
Date : 2012
Catégorie(s)
#INRAE #PEARLRésumé
Although benthic diatoms are widely used in ecological studies of aquatic systems, there is still a dearth of data concerning species sensitivities towards several contaminants. Within the same community, different species may respond differently depending on their physiological and ecological characteristics. This lack of knowledge makes specific appropriate risk assessment impossible. To find out whether species sensitivity distribution (SSD) could be used to estimate the risk of herbicide toxicity for diatoms, we need to know whether their sensitivity depends on their physiological and ecological characteristics. We carried out single-species bioassays on 11 diatom species exposed to 8 herbicides. Dose-responses relationships were used to extrapolate the Effective Concentration 5 (EC5) and the Effective Concentration 50 (EC50) for each exposure. These data were used to fit a SSD curve for each herbicide, and to determine the Hazardous concentration 5 (HC5) and 50 (HC50). Our results revealed a high level of variability of the sensitivity in the set of species tested. For photosystem-II inhibitor (PSII) herbicides, diatoms species displayed a typical grouping of sensitivity levels consistent with their trophic mode and their ecological guild. N-heterotroph and ‘‘motile’’ guild species were more tolerant of PSII inhibitors, while Nautotroph and ‘‘low profile’’ guild species were more sensitive. Comprehensive SSD curves were obtained for 5 herbicides, but not for sulfonylurea herbicides or for dimetachlor, which had toxicity levels that were below the range of concentration tested. The SSD curves provided the following ranking of toxicity: diuron. terbutryn. isoproturon. atrazine. metolachlor. The HC that affected 5% of the species revealed that, even at the usual environmental concentrations of herbicides, diatom assemblages could be affected, especially by isoproturon, terbutryn, and diuron.
Auteurs, date et publication :
Auteurs Floriane Larras , Agnès Bouchez , Frédéric Rimet , Bernard Montuelle , Sandra Maria Feliciano de Oliveira Azevedo
Publication : Plos One
Date : 2012
Volume : 7
Issue : 8
Pages : e44458
Catégorie(s)
#INRAE #OLARésumé
In acidic forest soils, aluminium can alter tree health due to its potential toxicity. Aluminium phytotoxicity is mainly influenced by its chemical form and its availability. As physical-chemical indicators of Al toxicity in soil, Al speciation in soil solutions and in the exchange complex was measured in the rhizosphere and the bulk soil of two tree species (Norway spruce (Picea abies (L.) Karst.) and European Beech (Fagus sylvatica L.) in an acidic soil and in 4 months (November, February, May and August) representing the four seasons in a year. In the bulk soil, Al toxicity was generally higher under Norway spruce than under beech. Furthermore, temporal changes in Al behaviour were identified under Norway spruce but not under beech. The monomeric Al in the soil solutions and the exchangeable Al in the solid soil increased significantly in February under Norway spruce and were positively correlated with nitrate concentration, suggesting that nitrate influence Al speciation and mobility under Norway spruce. In the rhizosphere, Al toxicity was restricted through Al complexation by organic compounds and by nutrient contents independently from the season. The ecological importance of the rhizosphere in Al detoxification is discussed. This study suggests that plant specific differences as well as seasonal changes in plant physiology, microbial activity and microclimatology influence aluminum toxicity in acid forest soils.
Auteurs, date et publication :
Auteurs C. Collignon , J. -P. Boudot , M. -P. Turpault
Publication : Plant and Soil
Date : 2012
Volume : 357
Issue : 1-2
Pages : 259-274