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Jonas Jourdan

Jonas Jourdan

Ph.D. student

C2.2: GENETIC DIVERSITY OF INVASIVE SPECIES IN RIVER ECOSYSTEMS

Research interests

I am investigating climate-driven intra-specific diversification (i.e., local adaptation and phenotypic plasticity) in Eastern mosquitofish (Gambusia holbrooki; Poeciliidae) in collaboration with our partners B. Langerhans (Raleigh, North Carolina) and R. Riesch (Sheffield, UK). My main project focusses on adaptive trait divergence in physiological, morphological and life history traits, as well as population genetic differentiation along the species’ natural south-north gradient in the USA (Florida Keys to New Jersey). This is accompanied by a comparative analysis of differentiation patterns in European populations of the same species. Gambusia holbrooki has been introduced to southern Europe some 80 to 100 years ago for malaria prophylaxis and spread northwards, whereby it shows a remarkable adaptability to different climatic conditions within its novel distribution range.

I have additional interests related to ecological interactions among aquatic taxa; e.g., I am investigating adaptive life history plasticity in mosquitoes (Culex pipiens) in response to ambient predator regimes. I am also involved in studies pursuing questions related to interactions among native and invasive amphipods, whether and how gradient evolution may occur along stream flow regimes, and how this could affect ecosystems services (like leaf-litter decomposition).

Contact:
Phone: +49 (0)69 798 42171 
E-Mail