Concours C Génial - Sciences à l'école

La classe de 5ème 506 du collège Terrain Fayard a participé au concours C.génial avec son projet "Vegetal Foam Réunion", dont le résumé est ci-dessous, avec le soutien scientifique de C. Ah-Peng.

"La mousse est une plante de petite taille, qui se trouve dans toutes les régions du monde. C'est un végétal qui n'a pas de racines, ni de vaisseaux. On appelle cela une bryophyte. Nous allons, à travers notre projet «Vegetal Foam Réunion», montrer comment sensibiliser le public à l'utilisation de la mousse végétale dans la vie courante Lire la suite

EROVEG : interactions between rainfall erosion and vegetation

We are now starting a new collaborative project with geologists and climatologists to study the relationships between erosion, precipitation regimes, and vegetation in the context of La Réunion island. Due to its size, very heterogeneous landscapes and, above all, its high elevation (~ 3070 m a.s.l, Piton des Neiges), the island receives massive amounts of rainfall each year and posseses several World records. But prepicipations regimes are diverse on the island and likely to change in the future in response to global changes.
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Island Biology conference July 2016

The first Island Biology conference was hosted in Hawaii. The second conference will be happening in the Azores. Attendance at this conference is a must for any island biologist!

The “Island Biology 2016” (18-22 July 2016, University of Azores at Angra do Heroísmo, Terceira, Azores) conference webpage is: http://www.islandbiology2016.uac.pt/

Visit the webpage and register as soon as possible a Pre-Registration at http://www.islandbiology2016.uac.pt/#page3
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Séminaire «Biodiversité»

feder_biodiversite_1429686250_25Le séminaire de restitution du programme FEDER «Biodiversité» aura lieu du 2 au 5 juin 2015 sur le campus du Moufia de l'Université de La Réunion.

Voir le site du séminaire : https://about.me/feder_biodiversite

Population structure in the tropical peat moss, Sphagnum tumidulum Besch. (Sphagnaceae)

Abstract

Route de BebourSphagnum and Sphagnum-dominated peatlands have long provided a model for analyses of community structure, and recent work has elucidated the genetic structure of various Sphagnum species in the boreal zone. We report here analyses of genetic variation and population differentiation in a tropical species, S. tumidulum, from Réunion Island. Lire la suite

Isolation and characterization of microsatellite markers of an endangered tropical tree

http://dx.doi.org/10.1007/s12686-011-9437-0

Abstract

Sideroxylon majus (Sapotaceae) is an endangered endemic tree of La R,union Island that has suffered from human actions. It is present in small and isolated populations that encounter severe difficulties to regenerate. To have powerful tools for population genetic studies, we have isolated and characterized 14 polymorphic microsatellite markers from S. majus. The 14 loci were tested on 57 individuals from 6 populations. The number of alleles per locus varied from 2 to 20, with an average of 11.8. The observed and expected heterozygosity levels ranged from 0.053 to 1.000, and 0.116 to 0.917, respectively. Six of the 14 loci deviated from Hardy-Weinberg equilibrium. These polymorphic microsatellite markers constitute new tools to study the genetic diversity and spatial genetic structure of S. majus. The cross-species amplifications indicate that most of these loci can be used to investigate population genetic structure in S. grandiflorum, S. boutonianum and S. sessiliflorum. These studies will provide useful results for the elaboration of effective conservation strategies.

Citation

cons_genet_2011

Dafreville, S., Payet, G., Simiand, C., Risterucci, A. M., Riviere, E., Lebreton, G., Humeau, L., Strasberg, D.,Chevallier, M. H. 2011. Isolation and characterization of microsatellite markers of an endangered tropical tree, Sideroxylon majus, and cross-species amplification in other Sapotaceae species. Conservation Genetics Resources 3(4): 701-704.