Impact des éléments traces métalliques (ETMs) sur la structure génétique des populations de vers de terre

Abstract : Earthworms are abundant in our soils, they form the largest animal biomass of these. They are considered the main engineers of the soil and are known for the many ecosystem services they provide. But earthworms are very vulnerable to anthropogenic sources of pollutants, including heavy metals discharged in large quantities in agriculture and in industry. In order to study their effect on the genetic structure of earthworm populations , the species of Lumbricus castaneus individuals were sampled on a former. industrial site, with an area polluted by metals and an unpolluted area Five genetic markers specific to this species have been developed, allowing the comparison of different parameters of populations genetics. Analyses have shown very small difference between the two zones, but those achieved by Geneland highlight two distinct subpopulations, one population in the polluted area and another one in the non-polluted area. Nevertheless it would be interesting to conduct further analysis with more than five markers, and identify juveniles of the species in order to get data on the effect of pollution on reproduction.
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Master thesis
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Valentin Deschins. Impact des éléments traces métalliques (ETMs) sur la structure génétique des populations de vers de terre. Sciences de l'environnement. 2016. ⟨hal-01824270⟩

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