Bernard BARASCUD MCF
Rémi CHAPPAZ PR
Jean-Pierre CORNEC MCF (retired)
Caroline COSTEDOAT MCF
Corinne CUOC MCF
Vincent DUBUT IGR
André GILLES MCF
Rémi Grenier AI
Emese MEGLECZ MCF
Gabriel NEVE MCF
Georges OLIVARI MCF (associated)
Nicolas PECH MCF
Yvan PEREZ MCF
Jeannine RAMPAL MCF (retired)
Chantal ASPE MCF (LPED, UMR 151 AMU-IRD)
PhD students and post-docs
Emmanuel CORSE Post-doc
Ivan PAZ Post-doc
Arnaud UNGARO PhD student
This theme aims at examining understudied biological groups and understanding the evolution of their biodiversity. Our work focuses on evaluating or reevaluating their geographic distribution, their morpho-anatomic features, reproductive behavior, genetic diversity or phylogenetic relationships.
With this goal in mind, we develop new molecular markers from NGS-based microsatellite libraries from various taxonomic groups (e.g. fish and butterflies). We also put effort on acquiring transcriptomes (chaetognaths, acanthocephalans, and fish). Several biological models are studied in the team among which, for continental environment : freshwater fish (Cyprinidae, Cichlidae, Percidae) and their parasites (acanthocephalans) ; butterflies (Papilionidae,Nymphalidae) ; cockroaches (Oxyhaloinae) and for marine environment : copepods, thecosoms and chaetognats.
Our main objective is to eventually integrate those various sources of data to get a better understanding of the evolution of biodiversity in these groups. Applying this research in environment management and species conservation (species that may present a high patrimonial value) is insured through interactions with other teams from IMBE hence leading to solutions in environmental management strategies.
The aim in this theme is to understand the associations between genomes and life history traits in a range of biological systems as well as their evolution in varying environments.
We have been working on hybrid zones of freshwater fish as an integrative model in Mediterranean environment (chondrostoma) for 15 years. We study the evolution of morphological modifications between species and their ontogenetic trajectories, as well as the plasticity of the diet using in-house diet barcoding tools (Eucaryota/18S – methodology that can be generalized to other ecosystems). We also acquire genomic information with nuclear (microsatellites) and mitochondrial sequence markers. The development and analysis of a large number of sequences from 454 pyrosequencing resulted in more than a hundred microsatellite markers, wich allowed estimating genomes diversity both for individual species and hybrid systems. We can now refine the studies focusing on the impact of the environment on different genome regions. This study will be jointly undertaken on a second freshwater fish model, Barbus (collaboration with university of Montpellier, ISEM). Finally the environmental barcoding will be generalized (collaboration with Montpellier SupAgro, CBGP).
Contamination of the aquatic environment induced by diverse human activities generates higher concentration and diversity of molecules with a high polluting potential. Moreover, effects related to the global climate change also increase, and directly impact on the quality and quantity of usable water resources, which itself brings consequences on ecosystems functioning.
This eco-genomics theme articulates around the study of ecosystems dynamics (in particular in the Durance basin) and the characterization of the impact of contaminants. This integrative approach combines both chemistry of pollutants (collaboration with LCP laboratory, Aix-Marseille University ; JL Boudenne) and genomics through the development genes expression methods (Illumina) used to establish the relationships between expression levels linked to heterogeneous environment, and persistence of populations. This study aims at answering the current stakes corresponding to an increased societal demand regarding the quality of aquatic ecosystems, the evaluation of risks (ecotoxicology in collaboration with axis 6 at IMBE) and the patrimonial management of biological natural resources.
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