biodiversité – Prolifération des écrevisses américaines dans les cours d'eau de l'Avesnois

This written question asks about the proliferation of American crayfish in the waterways of the Avesnois region. It seeks information on the extent of the problem and potential impacts on local biodiversity. The question highlights concerns for native species and the aquatic ecosystem. It aims to understand the measures being considered or taken to manage this invasive species.