ABOUT EVOTOX
Climate change and biodiversity loss are one of the biggest threats facing the world in the next decade. Invasive alien species (IAS) are one of the most important direct drivers of biodiversity loss. While evolutionary processes and rapid adaptation have recently been linked with the increase of invasive capacity of IAS, still there is little known about the mechanisms involved in their success. EvoTox is an interdisciplinary project that seeks to address how IAS populations can evolve and adapt rapidly in response to environmental stressors. EvoTox focuses more particularly on the study of the mechanisms that facilitate the rapid adaptation of the crayfish Procambarus clarkii in aquatic areas with high-level of anthropogenic pollutants. The study involves both field and laboratory approaches using technics from several scientific fields such as evolutionary biology, toxicology, physiology, ethology and molecular biology.
The studied populations come from three sampling stations, with freshwater and brackish water bodies, around the French Mediterranean coastline and adjacent aquatic areas, where P. clarkii has successfully established and environmental characteristics such as salinity and chemical pollutant concentrations differ. Understanding the mechanisms that contributes to the rapid and adaptive evolution in P. clarkii is important for identifying candidate genes involved in invasiveness, and, more generally, predicting future invasion scenarios, improving management and risk assessment of IAS in Europe and worldwide. EvoTox also contributes to the European Green Deal and the EU Biodiversity Strategy for 2030 by addressing IAS issues and their ecological and economic repercussions.
THE CRAYFISH PROCAMBARUS CLARKII
Well established throughout Europe, Asia, Africa, North America and South America.
Tolerate environmental extremes, and display generalist and opportunistic feeding habits.
Figure 1) The global invasion routes of the red swamp crayfish, Procambarus clarkii, native from southern U.S.A. and north‐eastern Mexico, Oficialdegui et al. Unravelling the global invasion routes of a worldwide invader, the red swamp crayfish (Procambarus clarkii). Freshwater Biol. 2019;64:1382–1400.
Its high potential of adaptation, makes it an ideal model to study pollutant driven rapid evolution.
Introduced in 1976 into western France.
Nowadays is widespread in 61 departments.
THE EVOTOX PROJECT AIMS AT GAINING DEEPER INSIGHTS INTO THE MECHANISMS THAT FACILITATE THE RAPID ADAPTATION OF THE CRAYFISH PROCAMBARUS CLARKII IN ENVIRONMENTS WITH CHEMICAL CONTAMINATION AND VARIABLE SALINITY LEVELS.
Objetives
To determine the physiological state and behaviour of individuals in their natural environment.
To determine the physiological and molecular responses of individuals to different levels of chemical and salinity exposure in laboratory setting.
To genetically and morphologically characterise three populations of crayfish, which inhabit areas exposed to different levels of chemical contamination and different salinity concentrations.
