0000000000748933
AUTHOR
Arnaud Chaumot
Cd-resistance in field Gammarus populations: genetic adaptation, transgenerational effect, or selection of phylogenetic cryptic lineages?
International audience; We have recently identified a field population of the crustacean Gammarus fossarum historically-exposed (geochemical background) to cadmium (Cd) that exhibits a resistance transmissible to offspring. This population constitutes a good case study to investigate mechanisms underlying population’s resistance to long-term exposure to contamination that are of deep concern for ERA, especially in the field. In order to gain insights into the determinism of the Cd-resistance observed in this historically-exposed population, we applied quantitative genetic protocols both in two Cd-naive populations and in the resistant one. In addition, because G. fossarum is known to consti…
Development and dissemination to operational stakeholders of integrative tools for chemical and biological measurements in watercourses to monitor the impact of pesticides according to agricultural practices and their evolution
The results of the Impact-CE project highlight the specific contribution of various integrative tools to have a more complete vision of the chemical and biological impact of pesticides on watercourses. In addition to grabe sampling, which gives a quantitative and instantaneous view of contamination, these tools provide more representative information over time, which makes them better tools for prioritising basins that contribute to contamination. They are also more robust for reporting interannual changes in agricultural practices, even if it may remain difficult to dissociate the effect of limited changes in practices from that of significant climatic variations. The results also confirm …