Search results for "environnement"
showing 10 items of 327 documents
Bayesian spatio-temporal approach to identifying fish nurseries by validating persistence areas
2015
Spatial and temporal closures of fish nursery areas to fishing have recently been recognized as useful tools for efficient fisheries management, as they preserve the reproductive potential of populations and increase the recruitment of target species. In order to identify and locate potential nursery areas for spatio-temporal closures, a solid understanding of species− environment relationships is needed, as well as spatial identification of fish nurseries through the application of robust analyses. One way to achieve knowledge of fish nurseries is to analyse the persistence of recruitment hotspots. In this study, we propose the comparison of different spatiotemporal model structures to ass…
Intégrer la connectivité paysagère dans la séquence ERC : une approche par la quantité d'habitat atteignable
2019
Des engagements nationaux, européens et internationaux ont été pris pour maintenir et restaurer la connectivité entre habitats naturels face à la perte et à la fragmentation de ces habitats. Dans le même temps, les politiques environnementales dans différents pays mettent en oeuvre la séquence Eviter-Réduire-Compenser (ERC) pour atteindre l’objectif d’absence de perte nette de biodiversité (PPN). La séquence ERC a pour principe d’évaluer l’ensemble des impacts écologiques d’un aménagement, mais les critères et indicateurs permettant de quantifier les impacts sur la connectivité paysagère ne sont pas satisfaisants. Nous proposons une démarche opérationnelle pour évaluer les impacts environne…
la prospection systématique d’un fond de rivière : l’exemple du Doubs
2020
La présentation des méthodes mises en œuvre et des résultats obtenus à l’occasion d’une opération de prospection subaquatique systématique menée sur la rivière Doubs, en amont de Verdun-sur-le-Doubs (Saône-et-Loire), illustre en grandeur réelle l’intérêt de la démarche adoptée, fondée sur des principes simples, dans la perspective d’un inventaire systématique du patrimoine fluvial immergé. La diversité des vestiges découverts et leur répartition sur la longue durée en soulignent la pertinence mais également, s’il en était encore besoin, la réalité du formidable potentiel archéologique que recèlent les cours d’eau. The presentation of the methods used and results obtained during a systematic…
Les paradoxes de la Norme en matière de Responsabilité Sociale et Environnementale d'Entreprise, en France
2010
GEOV1: LAI, FAPAR essential climate variables and FCOVER global time series capitalizing over existing products. Part 2: Validation and intercomparis…
2013
International audience; This paper describes the scientific validation of the first version of global biophysical products (i.e., leaf area index, fraction of absorbed photosynthetically active radiation and fraction of vegetation cover), namely GEOV1, developed in the framework of the geoland-2/BioPar core mapping service at 1 km spatial resolution and 10-days temporal frequency. The strategy follows the recommendations of the CEOS/WGCV Land Product Validation for LAI global products validation. Several criteria of performance were evaluated, including continuity, spatial and temporal consistency, dynamic range of retrievals, statistical analysis per biome type, precision and accuracy. The…
Approche démographique du risque sanitaire en Afrique
2015
International audience; ...
Semantically enriched informed environment for multi-agent simulation : application to simulation in 3D virtual environment
2014
This thesis focuses on multi-agent simulation applied to the simulation of individuals in virtual 3D buildings. To do this, our work suggests to capitalize on the experience gained in the field of semantic web ontologies and inference engines to facilitate the design and development of intelligent behavior for agents operating in virtual worlds. The goal is to provide to agents a generic approach to managing their representation of the world and reason about this representation. For this, the central problem is based on the definition of a decidable ontology modeling all of the knowledge contained in the virtual 3D environment to enrich semantically the environment of a multi-agent simulati…
The Green Deal and the CAP: policy implications to adapt farming practices and to preserve the EU's natural resources
2020
The June 2018 CAP proposals are only marginally consistent with the ambitions of the Green Deal. This is also the case of the regulation revisions being adopted by either the Council or the European Parliament in October 2020. Making EU agriculture consistent with the Green Deal but would require a whole food chain policy that encompasses more stringent instruments on the supply side and extensive changes in eating patterns.
Landscapes and traces of human activities preserved under forest : the forest of Val Suzon (Côte-d'Or) on long time
2021
This thesis is part of a process to improve and deepen our knowledge of the territory of Val Suzon (21), especially concerning its history. It is a matter of studying the evolution of the natural and social dynamics that shaped the forest of Val Suzon, thanks to a multidisciplinary approach focusing on biodiversity, landscape, history, archeology, etc. The subject of this thesis concerns, among other things, issues relating to natural resources available in the territory of Val Suzon as well as the management and exploitation of these resources by human communities. It also focuses on identifying the impacts of these activities on flora and fauna, examining their adaptation over time and sp…
Oedenburg. Une agglomération d’époque romaine sur le Rhin supérieur : fouilles françaises, allemandes et suisses à Biesheim-Kunheim (Haut-Rhin)
2005
Die römische Fundstelle Oedenburg (Biesheim-Kunheim, Haut-Rhin, France) wird seit 1998 von einem international Team ausgegraben (Ecole pratique des hautes études, Paris, Universität Freiburg im Breisgau, Deutschland, Universität Basel, Schweiz). Gegenüber dem keltischen Oppidum von Breisach, nahe am heutigen Rhein gelegen, war die Siedlung in einer deutlich anderen Landschaft angelegt worden, die damals von verschiedenen Flussarmen durchzogen war. Nach dem bisherigen Stand der Erforschung scheint der Ort zu Beginn der tiberischen Zeit von einem Militärlager besetzt gewesen zu sein, das zum Kommandobereich von Vindonissa im Nordteil des Territoriums der Rauriker gehörte. Zur gleichen Zeit en…