40 research outputs found
GreenPhylDB v2.0: comparative and functional genomics in plants
GreenPhylDB is a database designed for comparative and functional genomics based on complete genomes. Version 2 now contains sixteen full genomes of members of the plantae kingdom, ranging from algae to angiosperms, automatically clustered into gene families. Gene families are manually annotated and then analyzed phylogenetically in order to elucidate orthologous and paralogous relationships. The database offers various lists of gene families including plant, phylum and species specific gene families. For each gene cluster or gene family, easy access to gene composition, protein domains, publications, external links and orthologous gene predictions is provided. Web interfaces have been further developed to improve the navigation through information related to gene families. New analysis tools are also available, such as a gene family ontology browser that facilitates exploration. GreenPhylDB is a component of the South Green Bioinformatics Platform (http://southgreen.cirad.fr/) and is accessible at http://greenphyl.cirad.fr. It enables comparative genomics in a broad taxonomy context to enhance the understanding of evolutionary processes and thus tends to speed up gene discovery
Foliar Samples Collection and LMA Ratio Determination
Version 20180415International audienc
Foliar Samples Collection and LMA Ratio Determination
Version 20180415International audienc
Le projet ForĂȘts-21
Le portail ForĂȘts-21 permet de visualiser des projections spatialisĂ©es de la production et des fonctions environnementales des forĂȘts de production sur la pĂ©riode 2020-2100. Il met Ă disposition de ses utilisateurs des simulations de diffĂ©rents modes de gestion en contexte de changement climatique. Ce portail est alimentĂ© par les simulations dâun ensemble de modĂšles raccordĂ©s au simulateur GO+. Il permet de prendre en compte de façon interactive tout un ensemble de schĂ©mas de sylvicultures, leurs performances Ă©conomiques et environnementales et leur vulnĂ©rabilitĂ© aux tempĂȘtes, sĂ©cheresses et incendies
ICOS France
Les Ă©missions mondiales de gaz Ă effet de serre ont augmentĂ© jusquâĂ atteindre en 2017 des niveaux sans prĂ©cĂ©dent, plus de 400 ppm en CO2. Elles ont progressĂ© plus rapidement entre 2000 et 2010 (+2,2% par an) quâau cours des trois dĂ©cennies prĂ©cĂ©dentes. Maintenir un rĂ©chauffement infĂ©rieur Ă +2°C de tempĂ©rature moyenne, comme le stipulent les engagements pris lors de la confĂ©rence de Paris, nĂ©cessite de rĂ©duire les Ă©missions mondiales de GES de 40 Ă 70%. Mais comment mesurer les Ă©changes de gaz Ă effet de serre, et vĂ©rifier les impacts des politiques de rĂ©duction adoptĂ©es sur lâatmosphĂšre et le climat ? LâInfrastructure europĂ©enne ICOS rĂ©pond Ă cette attente : elle est constituĂ©e de rĂ©seaux organisĂ©s de mesure du cycle du gaz Ă effet de serre dans lâatmosphĂšre, les continents et les ocĂ©ans. ICOS est spĂ©cifiquement dĂ©diĂ©e Ă la mesure des flux et des concentrations en dioxyde de carbone (Ă©cosystĂšmes, fuels fossiles et cimenteries), mĂ©thane (gaz naturel, agriculture et Ă©levage), et oxyde nitreux (agriculture, fuels fossiles et feux) de 2016 Ă 2035. Lâinfrastructure ICOS mobilise plus de 500 chercheurs et ingĂ©nieurs de 17 pays europĂ©ens ; câest un Ă©lĂ©ment clĂ© de la feuille de route europĂ©enne des infrastructures de recherche (ESFRI) et elle constitue un TrĂšs Grand Instrument de Recherche (TGIR) de la stratĂ©gie nationale de recherche française
ICOS France
Les Ă©missions mondiales de gaz Ă effet de serre ont augmentĂ© jusquâĂ atteindre en 2017 des niveaux sans prĂ©cĂ©dent, plus de 400 ppm en CO2. Elles ont progressĂ© plus rapidement entre 2000 et 2010 (+2,2% par an) quâau cours des trois dĂ©cennies prĂ©cĂ©dentes. Maintenir un rĂ©chauffement infĂ©rieur Ă +2°C de tempĂ©rature moyenne, comme le stipulent les engagements pris lors de la confĂ©rence de Paris, nĂ©cessite de rĂ©duire les Ă©missions mondiales de GES de 40 Ă 70%. Mais comment mesurer les Ă©changes de gaz Ă effet de serre, et vĂ©rifier les impacts des politiques de rĂ©duction adoptĂ©es sur lâatmosphĂšre et le climat ? LâInfrastructure europĂ©enne ICOS rĂ©pond Ă cette attente : elle est constituĂ©e de rĂ©seaux organisĂ©s de mesure du cycle du gaz Ă effet de serre dans lâatmosphĂšre, les continents et les ocĂ©ans. ICOS est spĂ©cifiquement dĂ©diĂ©e Ă la mesure des flux et des concentrations en dioxyde de carbone (Ă©cosystĂšmes, fuels fossiles et cimenteries), mĂ©thane (gaz naturel, agriculture et Ă©levage), et oxyde nitreux (agriculture, fuels fossiles et feux) de 2016 Ă 2035. Lâinfrastructure ICOS mobilise plus de 500 chercheurs et ingĂ©nieurs de 17 pays europĂ©ens ; câest un Ă©lĂ©ment clĂ© de la feuille de route europĂ©enne des infrastructures de recherche (ESFRI) et elle constitue un TrĂšs Grand Instrument de Recherche (TGIR) de la stratĂ©gie nationale de recherche française
Looking for compensation at multiple scales in a wetland bird community
Compensatory dynamics, during which community composition shifts despite a near-constant total community size, are usually rare: Synchronous dynamics prevail in natural communities. This is a puzzle for ecologists, because of the key role of compensation in explaining the relation between biodiversity and ecosystem functioning. However, most studies so far have considered compensation in either plants or planktonic organisms, so that evidence for the generality of such synchrony is limited. Here, we extend analyses of community-level synchrony to wetland birds. We analyze a 35-year monthly survey of a community where we suspected that compensation might occur due to potential competition and changes in water levels, favoring birds with different habitat preferences. We perform both year-to-year analyses by season, using a compensation/synchrony index, and multiscale analyses using a wavelet-based measure, which allows for both scale- and time-dependence. We analyze synchrony both within and between guilds, with guilds defined either as tightknit phylogenetic groups or as larger functional groups. We find that abundance and biomass compensation are rare, likely due to the synchronizing influence of climate (and other drivers) on birds, even after considering several temporal scales of covariation (during either cold or warm seasons, above or below the annual scale). Negative covariation in abundance at the guild or community level did only appear at the scale of a few months or several years. We also found that synchrony varies with taxonomic and functional scale: The rare cases where compensation appeared consistently in year-to-year analyses were between rather than within functional groups. Our results suggest that abundance compensation may have more potential to emerge between broad functional groups rather than between species, and at relatively long temporal scales (multiple years for vertebrates), above that of the dominant synchronizing driver.COntinental To coastal Ecosystems: evolution, adaptability and governanc
GEECHA : GEstion des ECHAntillons: Gestion et traçabilité des échantillons
GEECHA : GEstion des ECHAntillons. Gestion et traçabilité des échantillons . CAT 201