The final balance sheet reports of two deadToday Nicolas Lemaire wants to diversifyThe fight against climate change finally growingKookai therefore the antiDim Dim seduced by womenAged seventyeight the person concerned provides have everything preparedFor the moment there has not yet was defects700 education nationale and 4400 to the defenceOn the week this is almost the status quoA distribution of tasks dictated by the operating costs The low cost pressure reinforces the need to adaptA "Google Map" of the coastal Fund will soon be available. In a few days, "Haliotis" featured cause loop observation campaign in the Bay of Morlaix. This study will conclude the first inventory of the biodiversity of the Breton coastal Fund, started in 2003. Operation "rebent" thus passes the experimental stage to the routine. It has Brittany now in a State of reference for its coasts, year zero to be used to measure the impact of climate change and human action in the future. These data will soon lead to a digital mapping wildlife and flora of the shoreline. The success of Rebent has become a model for other shores, similar work begins in Normandy, in the Mediterranean and Aquitaine.
The idea of this network is born after the sinking of the oil tanker "erika" in 1999. "It was not known at the time if he had to clean up sites, which are a priority, to which experts to appeal, etc.", explains Sandrine Derrien-Courtel, one of the leaders of the network at the MNHN.
Since then, biologists are organized network for joint surveillance of the coastline. Ifremer and partners attended the marine sites in the region and established a common protocol. The region of Brittany and the Total Foundation biodiversity and the sea have agreed the financing of the operation. Researchers have focused their comments on the benthos, this set of human beings living in more than 1 mm long and capita coastal bottom swept by the tides (50 m max depth). These populations are the first victims of the pollution suffered by the shore, that they come from the sea, estuaries or land. About 900 species of flora and fauna have been recorded for thirty years in Brittany. The Rebent network seeks to systematically map their distribution. Simple when it comes to species laid down in the soil such as algae or sponges, the task is more difficult for the semi-fixées species, such as sea urchins.
Oceanographers work at two scales for Brittany. Media mapping was carried out with the help of satellites, but largely coastal ships equipped with acoustic instruments, such as the heading "Haliotis". On a smaller scale, biologists have adopted 31 sites selected to encompass all types of habitat. Some areas are rocky areas, such as the archipelago of the Glénan, others the sandy Fund, as in Dinard. There are also mud flats, herbariums, etc. Every three years, a team of biologists returns on each site and updates the inventory.
Local crises
At sea, professional divers delimit the area to study with frameworks sealed 25 cm 40. At the bottom water, divers will deplete tedious days to count the number of individuals of each species present in the frameworks. On the foreshore, the work is done on foot. Generally operators are sufficiently experienced to visually recognize the species, but 15 of identifications must be done in the laboratory by molecular biology.
First inventories have already identified local crises. Last summer, divers have identified necrosis of the laminar alga Laminaria hyperborea in the Iroise Sea, at the tip of Brittany. Biologists have since collected samples to focus today on two tracks: a chemical pollution of water or a spread of bacteria or viruses. In-depth laboratory analyses should, this summer, exclude one of the two hypotheses.
