Cycle de conférences

[VENDREDI 24 NOVEMBRE] MIRCO BUNDSCHUH - Rise from the dead – chemicals affect heterotrophic processes  

The breakdown of dead organic material, such as plant litter, is a central process for carbon, nutrient and energy spiralling in aquatic and terrestrial ecosystems. In aquatic ecosystems organic matter breakdown is driven by substrate properties, aquatic microorganisms (mainly bacteria and fungi) and invertebrate detritivores (including cryptic lineages). Increasing evidence suggests that chemical stressors can affect this process in multiple ways, for instance, by modifying the feedbacks within the leaf associated microbial community ultimately translating to changes in leaf litter decomposition but also the transfer of energy to higher trophic levels.During the presentation, we will discuss horizontal and vertical interactions in heterotrophic model (eco)systems relevant to this ecosystem level process and how chemicals may alter such interplays.The discussion will be based on several case studies, which should provide a comprehensive overview of the complexity of this topic.