Éditeur(s) : HAL CCSD
Résumé : National audience
Nous présentons les premières phases d'un travail orienté vers la construction d'un thésaurus trilingue dédié à la biodiversité en méditerranée. Notre démarche se veut résolument synthétique et exploite à posteriori les dires d'experts accessibles depuis les publications scientifiques faisant référence dans le domaine. Les termes clés, qui sont à la base du socle conceptuel nécessaire à une meilleure compréhension de la biodiversité en méditerranée, sont acquis au travers d'une approche rigoureuse de fouille de texte qui est détaillée ici. Les premiers résultats obtenus sont rapportés et évalués. Les experts du domaine seront ensuite sollicités pour aider à articuler les termes au travers de structures hiérarchiques et ainsi retranscrire leur savoir sous la forme d'un thésaurus dédié à la biodiversité dans le bassin méditerranéen.
INFORSID
Montpellier, France

lirmm-00723586
http://hal-lirmm.ccsd.cnrs.fr/lirmm-00723586
http://hal-lirmm.ccsd.cnrs.fr/lirmm-00723586/document

Éditeur(s) : HAL CCSD American Association for the Advancement of Science
Résumé : International audience
Most eukaryotic organisms are arthropods. Yet, their diversity in rich terrestrial ecosystems is still unknown. Here we produce tangible estimates of the total species richness of arthropods in a tropical rainforest. Using a comprehensive range of structured protocols, we sampled the phylogenetic breadth of arthropod taxa from the soil to the forest canopy in the San Lorenzo forest, Panama. We collected 6144 arthropod species from 0.48 hectare and extrapolated total species richness to larger areas on the basis of competing models. The whole 6000-hectare forest reserve most likely sustains 25,000 arthropod species. Notably, just 1 hectare of rainforest yields >60% of the arthropod biodiversity held in the wider landscape. Models based on plant diversity fitted the accumulated species richness of both herbivore and nonherbivore taxa exceptionally well. This lends credence to global estimates of arthropod biodiversity developed from plant models.
ISSN: 0036-8075

hal-00817285
https://hal.archives-ouvertes.fr/hal-00817285
https://hal.archives-ouvertes.fr/hal-00817285/document
https://hal.archives-ouvertes.fr/hal-00817285/file/1226727Revisedtext.pdf
DOI : 10.1126/science.1226727

Éditeur(s) : HAL CCSD Springer Verlag (Germany)
Résumé : International audience
Tight control of basal cytosolic Ca2+ concentration is essential for cell survival and to fine-tune Ca2+-dependent cell functions. A way to control this basal cytosolic Ca2+ concentration is to regulate membrane Ca2+ channels including store-operated Ca2+ channels and secondary messenger-operated channels linked to G-protein-coupled or tyrosine kinase receptor activation. Orai, with or without its reticular STIM partner and Transient Receptor Potential (TRP) proteins, were considered to be the main Ca2+ channels involved. It is well accepted that, in response to cell stimulation, opening of these Ca2+ channels contributes to Ca2+ entry and the transient increase in cytosolic Ca2+ concentration involved in intracellular signaling. However, in various experimental conditions, Ca2+ entry and/or Ca2+ currents can be recorded at rest, without application of any experimental stimulation. This led to the proposition that some plasma membrane Ca2+ channels are already open/activated in basal condition, contributing therefore to constitutive Ca2+ entry. This article focuses on direct and indirect observations supporting constitutive activity of channels belonging to the Orai and TRP families and on the mechanisms underlying their basal/constitutive activities.
ISSN: 0175-7571

inserm-01526286
http://www.hal.inserm.fr/inserm-01526286
http://www.hal.inserm.fr/inserm-01526286/document
http://www.hal.inserm.fr/inserm-01526286/file/EBJO-D-16-00056_R1-2%20%282%29.pdf
PUBMED : 28516266