Sand dune ecosystems as a form of defence against coastal hazards: assessment on the Noirmoutier coast (Vendée)
Sand dune ecosystems as a form of defence against coastal hazards: assessment on the Noirmoutier coast (Vendée) By Françoise DEBAINE et Marc ROBIN L'Atlas Bleu / Protecting Coastal risk, dune ecosystem, protection service, geoindicator, diagnosis and monitoring Noirmoutier (Vendée). By considering dune ecosystems as agents of protection facing coastal risks, the article presents a method of dune condition diagnosis and monitoring based on the example of the Noirmoutier coastline. The method is based on a set of geoindicators related to a system of coastal “boxes” (50x300m). It allows to map the
Eutrophication of coastal waters: the case of Brittany’s green tides
Eutrophication of coastal waters: the case of Brittany’s green tides By Nicolas ROLLO L'Atlas Bleu / Protecting Eutrophication, green algae, covered area, evolution, Brittany After a contextualisation of the coastal waters eutrophication (world map), the article examines the case of Brittany, a French region strongly affected by this phenomenon. Graphical documents allow to assess its spatial impact in 2008 and its evolution from 1997 to 2011. Several elements of context on the fight against green tides are specified from an economic point of view.
Eutrophication of coastal waters in the Gulf of California (Mexico) and the spatial development of shrimp farming: the case of the Rio Fuerte delta
Eutrophication of coastal waters in the Gulf of California (Mexico) and the spatial development of shrimp farming: the case of the Rio Fuerte delta By Loïc MENANTEAU and Diana C. ESCOBEDO URIAS L'Atlas Bleu / Exploiting Eutrophication, shrimp farming, spatial spread, environment, Río Fuerte delta, Mexico The article focuses on two major phenomena that combine on the coastal zone of the Gulf of California (Sonora, Sinaloa, Mexico) especially in the Río Fuerte delta. On the maritime side, pollution of coastal waters is due to intensive cultivation, while on the terrestrial side, the
Fishing resources: catches and food availability
Fishing resources: catches and food availability By Julien NOËL L'Atlas Bleu / Exploiting Fishery resources, fishery, food fish consumption, disparity, world A map established on a global scale allows to compare the per capita food fish consumption by country and the fisheries catches of the adjacent ocean areas. North-South and inter-continental global disparities are highlighted and commented, revealing deep global imbalances in access to fishery resources. Fishery catches by FAO area and seafood food availability by country (interactive map)
Habitat vulnerability to coastal flooding risks. The example of L’Épine (Vendée, France)
Habitat vulnerability to coastal flooding risks. The example of L’Épine (Vendée, France) By Axel CREACH, Elie CHEVILLOT-MIOT and Denis MERCIER L'Atlas Bleu / Living Marine submersion, housing exposure, hazard, Xynthia, L’Epine, Vendée Based on the example of a municipality of the Noirmoutier island (Vendée), the article examines the vulnerability of housing to the risk of marine submersion of the Xynthia storm type, in a context of coastal urbanisation in low-lying areas. The cartographic synthesis allows to compare the potential water level and the architectural character of each construction, and to determine
Clandestine migrations in the Gulf of Guinea, non-native fishing camps on the Gabonese coast and in the Akanda National Park
Clandestine migrations in the Gulf of Guinea, non-native fishing camps on the Gabonese coast and in the Akanda National Park By Chancia NYINGUÉMA and Patrick POTTIER L'Atlas Bleu / Living Clandestine migration, foreign fisher, Gabonese coast, Akanda National Park The article describes clandestine maritime migrations at the scale of the Gulf of Guinea, and analyses the relationship with fishing communities practices through the examples of the Gabonese coast and the Akanda National Park. Indeed, the structuring and expansion of artisanal fishing practices in these areas favors the creation and settlement of
The Costa Concordia disaster and cruise tourism
The Costa Concordia disaster and the develpment of cruise tourism worldwide By Jacques GUILLAUME L'Atlas Bleu / Exploiting Costa Concordia, disaster, shipwreck, tourism, cruise, evolution The shipwreck of the Costa Concordia, occurred on January 13 2012 on the Italian coasts, brings to light the question about safety of cruise tourism, which know an important growth in different maritime geographical areas of the planet. The disaster gives an opportunity to grasp the main recent characteristics and evolution of this tourist activity sector deployed on the seas and coasts.
Vulnerability of Ivory Coast beaches to erosion
Vulnerability of Ivory Coast beaches to erosion By Célestin HAUHOUOT, Philibert KOFFI, Patrick POTTIER L'Atlas Bleu / Living Ivory Coast, coastal erosion, destroyed building, precariousness of the population, sector from Grand-Lahou to Assinie After highlighting the main physical characteristics of the Ivorian coastline on a national scale and proposing a typology of the sensitivity of its coastlines to erosion, the article examines the problem of coastal hindsight according to the point of view of the vulnerability of inhabited places. Several local examples are studied, showing the scope of the damage
Natural marine and coastal risks worldwide
What are the major natural risk the coastal zones cope at a global scale? What are their main drivers? The aim of this article is to propose a synthetic analysis and mapping of the different types of risks that occur in coastal zones.
Natural and anthropogenic hazards in tropical seas
This article proposes a synthetic visualisation of the risks weighing on the world intertropical zone. The interactive version of the map brings food for thought on each issue.