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Laurent Granjon

IRD Research Director, CBGP Deputy Director

My research activities refer to integrative systematics and population/community studies in African small mammals, especially in the context of the role of rodents in zoonose and as invasive species in West Africa.

Research activities

Following my posting period in Senegal (2008-2014), my current research activities concentrate on the following priorities:

- Long-term studies in (mainly African) rodent evolutionary systematics, phylogeny and phylogeography (subfamilies Murinae and Gerbillinae).

- Treatment and exploitation of data gathered during i) studies of differentiation mechanisms between sibling species of the genus Mastomys in captivity / semi-captivity conditions; ii) rodent community / population follow-up based on Capture-Mark-Release protocols; iii) small mammal inventories made in the frame of various programmes concerned by the success of invasive species and their impact on native communities and on human activities and health.

- Coordination  of the FRB/IRD research programme "CERISE" (SCEnarios of Rodent Invasion in the SahEl: Global change impact on the expansion of the Nigerian Gerbil and the House Mouse in Senegal; 2014-2017) implying various partners from France and Senegal, and aiming at i) updating occurrences of the house mouse and Nigerian gerbil in Senegal (capture and owl pellet data); ii) making predictions on the expansion of these two species based on modelling approaches; iii) disseminating information towards local stakeholders on these species and the associated potential problems in terms of damages on standing crops and stored products, as well as of human health via their role as hosts of various pathogens. 

Recent Publications

Bâ, K., Kane, M., Gauthier, P. & Granjon, L. 2013 - Ecology of a typical West African Sudanian savannah rodent community. Afr. J. Ecol., 51: 447-455.

Ben Faleh, A., Granjon, L., Tatard, C., Ben Othmen, A., Saïd, K. & Cosson, J.F. 2012 - Phylogeography of the Greater Egyptian Jerboa Jaculus orientalis (Rodentia: Dipodidae) in Mediterranean North Africa. Journal of Zoology, 286 : 208–220.

Ben Faleh, A., Granjon, L., Tatard, C., Duplantier, J.M., Dobigny, G., Hima, K., Saïd, K., Boratynski, Z. & Cosson, J.-F.  2012 - Phylogeography of two cryptic species of African desert jerboas (Dipodidae: Jaculus). Biological Journal of the Linnean Society, 107: 27-38 (+ Erratum in Biological Journal of the Linnean Society, 108: 470-471).

Boratyński, Z., Brito, J.C., Campos, J.C., Cunha, J.L., Granjon, L., Mappes, T., Ndiaye, A., Rzebik-Kowalska, B. & Serén, N. 2017. Repeated evolution of camouflage in speciose desert rodents. Scientific Reports, 7: 3522, DOI:10.1038/s41598-017-03444-y

Colangelo P., Verheyen E., Leirs H., Tatard C., Denys C., Dobigny G., Duplantier J.M., Brouat C., Granjon L. & Lecompte E. 2013 - A mitochondrial phylogeographic scenario for the most widespread African rodent species, Mastomys natalensis. Biol. J. Linn. Soc., 108: 901-916.

Crespin, L., Duplantier, J.M. & Granjon, L. 2012 - Demographic aspects of the island syndrome in two Afrotropical  Mastomys rodent species. Acta Oecologica, 39: 72-79.

Dalecky A., Bâ K., Piry S., Lippens C., Diagne C.A., Kane M., Sow A., Diallo M., Niang Y., Konečný A., Sarr N., Artige E., Charbonnel N., Granjon L., Duplantier J.M. & Brouat C. 2015. Range expansion of the invasive house mouse Mus musculus domesticus in Senegal, West Africa: a synthesis of trapping data over three decades, 1983-2014. Mammal Review 45 : 176-190.

Dobigny, G., Tatard, C., Gauthier, P., Bâ, K., Duplantier, J.-M., Granjon, L. & Kergoat, G.J. 2013 - Mitochondrial and nuclear genes-based phylogeography of Arvicanthis niloticus (Murinae) and sub-Saharan open habitats Pleistocene history. PLoS ONE 8(11): e77815. doi:10.1371/journal.pone.0077815.

Diagne M.M., Faye M., Faye O., Sow A., Balique F., Sembène M., Granjon L., Handschumacher P., Faye O., Diallo M. & Sall A.A. 2017. Emergence of Wesselsbron virus among black rat and humans in Eastern Senegal in 2013. One Health, 3 : 23-28.

Diatta, G., Souidi, Y., Granjon, L., Arnathau, C., Durand, P., Chauvancy, G., Mané, Y., Sarih, M., Belghyti, D., Renaud, F. & Trape, J.-F. 2012 - Epidemiology of Tick-Borne Borreliosis in Morocco. PLoS Neglected Tropical Diseases, 6(9): e1810. doi:10.1371/journal.pntd.0001810.

Diatta G., Duplantier J.M., Granjon L., Bâ K., Chauvancy G., Ndiaye M. & Trape J.-F. 2015. Borrelia infection  in  small  mammals  in  West  Africa and  its  relationship  with  tick  occurrence  inside  burrows. Acta Tropica,152: 131-140.

Granjon, L., Colangelo, P., Tatard, C., Dobigny, G., Colyn, M., Nicolas, V. 2012 - Intrageneric relationships within Gerbilliscus (Rodentia, Muridae, Gerbillinae), with characterization of an additional West African species. Zootaxa,3325: 1–25

Granjon, L. & Duplantier, J.-M. 2011 - Guinean biodiversity at the edge: Rodents in Southern Mali forest fragments. Mammalian Biology, 76: 583-591.

Granjon, L. & Montgelard, C. 2012. The Input of DNA Sequences to Animal Systematics: Rodents as Study Cases. In DNA Sequencing - Methods and Applications, Dr. Anjana Munshi (Ed.), ISBN: 978-953-51-0564-0, InTech. Available from: 104-140. 

Hima, K., Thiam, M., Catalan, J., Gauthier, P., Duplantier, J.M., Piry, S., Sembène, M., Britton-Davidian, J., Granjon, L., & Dobigny, G. 2011 - Extensive Robertsonian polymorphism in the African rodent Gerbillus nigeriae: geographic aspects and preliminary meiotic data. Journal of Zoology, 284 : 276–285.

Hudson L. N., Newbold T., Contu S., Hill S. L. L., Lysenko I., De Palma A., ... Granjon L.,...  Purvis A. (515 co-authors). 2017. The database of the PREDICTS (Projecting Responses of Ecological Diversity In Changing Terrestrial Systems) project. Ecology and Evolution, 7: 145–188. doi:10.1002/ece3.2579

Lucaccioni H., Granjon L., Dalecky A., Fossati O., Le Fur J., Duplantier J.M. & Handschumacher P. 2016. From human geography to biological invasions: the Black rat distribution in the changing Southeastern of Senegal. PLoS ONE 11 (9): e0163547

Ndiaye, A., Bâ, K., Aniskin, V., Benazzou, T., Chevret, p., Konečný, A., Sembène, M., Tatard, C., Kergoat, G.  & Granjon, L., 2012 - Evolutionary systematics and biogeography of endemic gerbils from Morocco: An integrative taxonomy approach. Zoologica Scripta, 41: 11-28.

Ndiaye A., Chevret P., Dobigny G. & Granjon L. 2016. Evolutionary systematics and biogeography of the arid habitat-adapted rodent genus Gerbillus (Rodentia, Muridae): a mostly Plio-Pleistocene African history. Journal of Zoological Systematics and Evolutionary Research, 54: 299--317

Ndiaye, A., Hima, K., Dobigny, G., Sow, A., Dalecky, A., Bâ, K., Thiam, M. & Granjon, L., 2014 - Integrative taxonomy of a poorly known Sahelian rodent, Gerbillus nancillus (Muridae, Gerbillinae). Zool. Anzeiger, 253: 430–439

Ndiaye A., Shanas U., Chevret P. & Granjon L., 2013. Molecular variation and chromosomal stability within Gerbillus nanus (Rodentia, Gerbillinae): taxonomic and biogeographic implications. Mammalia, 77: 105-111.

Ndiaye A., Tatard C., Stanley W. & Granjon L. 2016. Taxonomic hypotheses regarding the genus Gerbillus (Rodentia, Muridae, Gerbillinae) based on molecular analyses of museum specimens. ZooKeys 566: 145–155.

Peled, E, Shanas, U., Granjon L. & Ben-Shlomo R. 2016. Connectivity in fragmented landscape: Generalist and specialist gerbils show unexpected gene flow patterns. Journal of Arid Environments 125: 88-97

Trape J-F, Diatta G, Arnathau C, Bitam I, Sarih M, Belghyti, D., Bouattour, A., Elguero, E., Vial, L., Mané, Y., Baldé, C., Prugnolle, F., Chauvancy, G., Mahé, G., Granjon, L., Duplantier, J.-M., Durand, P. & Renaud, F. 2013 - The epidemiology and geographic distribution of relapsing fever borreliosis in West and North Africa, with a review of the Ornithodoros erraticus complex (Acari: Ixodida). PLoS ONE 8(11): e78473. doi:10.1371/journal.pone.0078473