Direction Regionale de lEnvironnement
Direction Regionale de lEnvironnement
Fiala-Medioni A.,University Pierre and Marie Curie |
Fiala-Medioni A.,CNRS Benthic Ecogeochemistry Laboratory |
Madurell T.,CSIC - Institute of Marine Sciences |
Romans P.,University Pierre and Marie Curie |
And 7 more authors.
Vie et Milieu | Year: 2012
52 years after the first explorations in the Lacaze-Duthiers Canyon and the observation of living populations of cold-water corals, recent video surveys using deployments of the ROV "Super-Achille" and the submersible "REMORA" (COMEX), have allowed the discovery of new sites colonized by cold-water coral populations (Lophelia pertusa, Madrepora oculata, Dendrophyllia cornígera and Desmophyllum dianthus). Dense populations were observed, from 250 to 535 m, either on blocks or cliffs. The coral community consisted of a rich fauna of invertebrates including numerous sponges, brachiopods, echinoderms, oysters, ascidians and bryozoans as well as vagile cephalopods and fishes. Among the 51 identified species, 4 species are protected by the French regulation (corals), 13 species are cited in European directives 79/109/EEC (Art 4) and 92/43/EEC (Annex 2), 2 species are cited in the OSPAR convention and 15 are of commercial interest. Direct observations allowed also establishing an increase of anthropogenic wastes mainly related to fishing.
Letellier L.,Laboratoire Central des Ponts et Chaussees |
Berthier E.,CEA DAM Ile-de-France |
Darboux N.,Direction Regionale de lEnvironnement
Bulletin des Laboratoires des Ponts et Chaussees | Year: 2010
The concern over water infiltration at the pavement surface lies at the core of various research projects conducted by LCPC, specifically targeting the topics of: road safety, infrastructure design and durability, and control of water pollution and soil. A prototype device, which offers a simple, non-destructive and rigorous measurement of pavement surface infiltration, is presented in this article. The device's underlying principle features a double ring with continuous measurement that is able to maintain a constant and low water charge at the surface. The Initial results obtained are most promising: device performance satisfies expectations; moreover, the measurements contain uncertainties that remain within an acceptable range with respect to the intended objective. Infiltration levels measured over a transect of lightly-travelled street surface indicate considerable spatial and temporal variability, which in all cases proves to be significant: between 10 -6 and 10-7 m/s, i.e. equivalent to what can be observed in a silty soil.
Latraube F.,Ligue pour la Protection des Oiseaux LPO de Loire Atlantique |
Le Neve A.,Direction Regionale de lEnvironnement
Alauda | Year: 2014
Within the Pays de la Loire region, the 450km long coastline and more than 200,000 ha of marshland offer a crucial panel of suitable habitats located on the main flyway used by this species on its prenuptial migration. The lake of Grand Lieu, the Loire estuary, the Brière marshland and, since recently, the Aiguillon bay are the major migration staging sites as revealed by ringing activities. One third of Aquatic Warblers are ringed in that area and mass of migrants are significantly higher in its southern part than in its northern part. This region can be considered as the major refueling area for the species in France and even along the whole international postnuptial flyway. The National Action Plan (2010-2014) allowed to improve the knowledge and the management of suitable habitats for the species. The preservation of these habitats deserves special monitoring measures which are also beneficial for other species such as the Corn Crake Crex crex.
Heudre D.,Direction Regionale de lEnvironnement |
Moreau L.,Direction Regionale de lEnvironnement |
Wetzel C.E.,Luxembourg Institute of Science and Technology LIST |
Ector L.,Luxembourg Institute of Science and Technology LIST
Cryptogamie, Algologie | Year: 2015
As a part of the Monitoring Program of the European Water Framework Directive, the phytoplankton of water bodies over 50 hectares have been studied in the Rhine-Meuse river basin. During the analysis, the centric diatom Aulacoseira scalaris (Grunow in Van Heurck) Houk, Klee & Passauer was identified from Longemer Lake in 2010 (Xonrupt-Longemer, France) and Gérardmer Lake in 2011 (Gérardmer, France). The presence of this diatom was again confirmed in samples collected in 2014 from both lakes. Interestingly, Aulacoseira scalaris until recently has been found only in fossil to subfossil materials from U.S.A. (State of Oregon and Virginia City, State of Nevada) and France (Vosges Mountains, Gérardmer Lake). The species has been observed for the first time in live material and should no longer be considered as strictly fossil or subfossil. Information on its autecology is provided using the physicochemical data of the lakes, and its morphology is compared with similar species of Aulacoseira in available literature. © 2015 Adac.