Researches

Currently, my main projects are on Saxifraga species delineation in South West Alps and carob tree (Ceratonia siliqua) phylogeography and ecology (https://dynamic.cirad.fr/). My important and recent papers are about the phygeography of the carob tree. We revealed a new scenario for Mediterraneran tree history and domestication. More details here.

These last years I developped my bioinformartics skills to assembly and analyses of RADseq data which is our main method to adress phylogenomic or population genomic issues for non-model organisms.

My project on Saxifraga sp. deals with the syngameon concept and I investigate how narrow endemics originated and persist in this syngameon. I focus mainly on S. delphinensis which is living in south-west prealps in an area corresponding more or less to a glacial refugia. Our unpublished results show former and current introgression in sympatry and allopatry situations. Publishing these results is ongoing and should achevied in 2023.

Recently, with my colleagues of the PPM team, we started a macroecological project dealing with the vulnerability of trees of arid lands face to climate change. The aim of the thesis of Manuel Cartereau (PPM/OEB teams) is to develop a global approach to ca 1k species trees and to have a focus on dragon trees. More details here.

My next projects (2023 and beyond) will deal with species delimitation and systematics. I’m considering to acquiers experience and use the Angiosperm353 bait in parallel with more classical method (barecode markers and morphometrics).

I’m still working on a lot of other case studies, such as Astragalus tragacantha, ..., and I keep an eye on Arenaria provincialis (phylogeography and evolution).

Since 2002, the year of the publication of my first phylogeny, I produced several phylogenic and phylogeographic results. The relationships among species and populations make evolution REAL and give a sense of the epic story of biodiversity. Below, some figures produced in my researches for the last 20 years, imagine the millions of years behind these patterns :)

Some key-words and selected papers,

Phylogeography, Biogeography, Plant systematic, Niche ecology, DNA, Polymorphism, Molecular ecology, Diversity, ...

  • Baumel A, Nieto Feliner G, Medail F, La Malfa S, Diguardo M, Boudagher-Kharrat M, Mirleau F, Frelon V, Ouahmane L, Diadema K, Sanguin S, Virue J. (2022). Genome-wide footprints in the carob tree (Ceratonia siliqua) unveil a new domestication pattern of a fruit tree in the Mediterranean. Molecular Ecology, 31, 4095–4111.
  • Viruel J, Le Galliot N, Pironon S, Nieto Feliner G, Suc JP, Lakhal-Mirleau F, Juin M., Selva M., Bou Dagher Kharrat M, Ouahmane L, Malfa S, Diadema K, Sanguin H, Méail F, Baumel A (2020). A strong east-west Mediterranean divergence supports a new phylogeographic history of the carob tree ( Ceratonia siliqua, Leguminosae) and multiple domestications from native populations. Journal of Biogeography 47:460-471.
  • Migliore, J., Baumel, A., Leriche, A., Juin, M., & Médail, F. (2018). Surviving glaciations in the Mediterranean region : an alternative to the long-term refugia hypothesis. Botanical Journal of the Linnean Society, 187(4), 537-549.
  • Hardion, L., Dumas, P. J., Abdel-Samad, F., Kharrat, M. B. D., Surina, B., Affre, L., ... & Baumel, A. (2016). Geographical isolation caused the diversification of the Mediterranean thorny cushion-like Astragalus L. sect. Tragacantha DC.(Fabaceae). Molecular Phylogenetics and Evolution 97:187-195
  • Pouget, M., Youssef, S., Migliore, J., Juin, M., Médail, F., & Baumel, A. (2013). Phylogeography sheds light on the central–marginal hypothesis in a Mediterranean narrow endemic plant. Annals of botany, 112 : 1409-1420.
  • Migliore, J., Baumel, A., Juin, M., & Médail, F. (2012). From Mediterranean shores to central Saharan mountains : key phylogeographical insights from the genus Myrtus. Journal of Biogeography, 39, 942-956.

My papers are on HAL alex-baumel

Ordination of Armeria sp. genotypes from Baumel et al. 2020, a population genetic approach applied to the conservation of incipient species.