Abstract

Toxic discharges from urban and industrial sources per hydrographic zone of the Loire Bretagne basin. This data was collected as part of the initial assessment of the MSFD with the Water Agency of Loire-Bretagne. Referent expert AAMP: Aurélie Blanck.

Discharges of nutrients (nitrogen, phosphorus and organic matter) and toxic releases (MI) per hydrographic zone from industries and communities of the Adour-Garonne basin. This data was collected as part of the initial assessment of the MSFD with the Water Agency of Adour-Garonne. Referent expert AAMP: Aurélie Blanck.

Within the framework of the establishment of a nuclear power plant on the coast of the town of Flamanville, Electricité de France has entrusted Ifremer with ecological and fishery studies on the site's surroundings. One of the expert assessments consists of conducting two shellfish fishing campaigns each year. Their objectives are to monitor the natural fluctuations of the main indicators selected during the start-up of the plant and to evaluate the impact of the plant on the surrounding fishery.

This data set was obtained during 2 ENVISION-IFREMER field campaigns carried out in 2007 and 2011 to sustain a Pectinid aquaculture project. This project was co-funded by ODEADOM and the public collectivity of Saint Pierre et Miquelon. Potential areas for further aquaculture exploitation and development on the Eastern coast of Saint Pierre et Miquelon.

Process-driven seafloor habitat sensitivity (PDS) has been defined from the method developed by Kostylev and Hannah (2007), which takes into account physical disturbances and food availability as structuring factors for benthic communities. It is a conceptual model, relating species’ life history traits to environmental properties. Physical environment maps have been converted into a map of benthic habitat types, each supporting species communities with specific sensitivity to human pressures. It is based on two axes of selected environmental forces. The "Disturbance" (Dist) axis reflects the magnitude of change (destruction) of habitats (i.e. the stability through time of habitats), only due to natural processes influencing the seabed and which are responsible for the selection of life history traits. The "Scope for Growth" (SfG) axis takes into account environmental stresses inducing a physiological cost to organisms and limiting their growth and reproduction potential. This axis estimates the remaining energy available for growth and reproduction of a species (the energy spent on adapting itself to the environment being already taken into account). It can be related to the metabolic theory of the ecology. The process-driven sensitivity (PDS) can be seen as a risk map that combines the two previous axes and reflects the main ecological characteristics of the benthic habitats regarding natural processes. Areas with low disturbance are areas with a naturally low reworking of the sediment, allowing the establishment of a rich sessile epifauna community, with K-strategy species. Areas with low SfG means that the environmental factors, even though there are not limiting, are in lower values, i.e. that it imposes a cost for species to live. In areas combining low disturbance and low SfG, big suspension-feeder species with long life and slow growth can often be found: these species are more vulnerable in case of added disturbance.

These data were collected during the 2007 and 2011 ENVISION-Ifremer campaigns to sustain a R & D project focusing on the Pectinid aquaculture development. This project was co-funded by the Saint Pierre et Miquelon public body and ODEADOM. This work aims to assess and select new potential rearing areas for the King scallop Placopecten magellanicus by using bottom type data resulting from 2 mapping campaigns carried out in 2007 and 2011 on the Eastern coast of Saint Pierre et Miquelon archipelago.

LOCALISATION : sde.orn.sde_spc et sde.orn.sde_trspc --- ANNÉE : 2009 --- FORMAT : vecteur --- DÉTAIL : - BD Carthage 2008 - IGN, - Données des SPC Méditerranee-Ouest, SPC Grand Delta et SPC Tarn-Lot - Limites communales et départementales - BD Carto IGN - Localisation des cours d'eau bénéficiant d'un suivi en cas de crues (tronçons réglemantaires) et des stations SPC