Learning experiences about intangible heritage conservation for sustainability in biosphere reserves

This paper presents case studies on different approaches to sustainable development carried out in the UNESCO MAB (Man and Biosphere) World Biosphere Reserve Network in Latin America and the Caribbean. In 2012, Latin America and the Caribbean had 116 biosphere reserves designated in 21 countries. In this region several biosphere reserves have implemented important management actions towards sustainable development by conserving ecosystem services and biodiversity (UNESCO 2006; 2008). These case studies highlight good practices on the use of traditional knowledge by scientific research and education for cultural and biological diversity conservation to the benefit of local and Indigenous communities. They focus on improving recognition of the unique ecological knowledge of these communities in Cabo de Hornos (Chile) and Bosawas (Nicaragua), and in the Caribbean: Sierra del Rosario and Cuchilla del Toa (Cuba). Moreover, they explore and reinforce the links between biological and cultural diversities in these outstanding sites, through local and Indigenous knowledge for the sustainable management of those sites.Cet article présente des études de cas de différentes approches du développement durable réalisées sous l’égide du Réseau mondial des réserves de biosphère de la division Homme et biosphère de l’UNESCO en Amérique latine et dans les Caraïbes. En 2012, l’Amérique latine et les Caraïbes possédaient 116 réserves de biosphère désignées dans 21 pays. Dans cette région, plusieurs réserves de biosphère ont mis en oeuvre d’importantes actions de gestion visant le développement durable en conservant les services écosystémiques et biodiversité. UNESCO 2006; 2008). Ces études de cas mettent en lumière les bonnes pratiques concernant l’usage qui est fait du savoir traditionnel par la recherche et l’enseignement scientifiques en vue de la conservation de la diversité culturelle et biologique au bénéfice des communautés locales et autochtones. Elles se concentrent sur l’amélioration du savoir écologique unique de ces communautés du cap Horn (Chili) et de la réserve Bosawas (Nicaragua) ainsi que, dans les Caraïbes, de la Sierra del Rosario et de la Cuchillas del Toa Cuba). En outre, elles explorent et renforcent les liens entre la diversité culturelle et la diversité biologique dans ces sites exceptionnels par le biais du savoir local et autochtone pour la gestion durable de ces sites

Les metaux et les algues marines : toxicite et accumulation du zinc et du cadmium chez deux especes unicellulaires : Cricosphaera elongata et Acetabularia acetabulum

SIGLECNRS T Bordereau / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

Structure and Composition of Rhodolith Beds from the Sergipe-Alagoas Basin (NE Brazil, Southwestern Atlantic)

Rhodolith beds are biogenic benthic habitats mainly formed by unattached, non-geniculate coralline algae, which can be inhabited by many associated species. The Brazilian continental shelf encompasses the largest continuous rhodolith bed in the world. This study was based on samples obtained from seven sites and videos taken by a Remotely Operated Vehicle (ROV) at four transects off the Sergipe-Alagoas Coast on the northeast Brazilian shelf. ROV operations and bottom trawl sampling revealed the occurrence of rhodolith beds between 25 and 54 m depths. At the shallower depths, fruticose (branching) rhodoliths (maërl) appear in troughs of ripples, and other non-branching rhodoliths occur associated with corals and sponge patches surrounded by bioclastic sand. Rhodoliths also occur in patches from 30 to 39 m depth; some are fused, forming larger, complex tridimensional structures. At deeper depths, from 40 to 54 m, the abundance of rhodoliths increases and occur associated with fleshy macroalgae on a smooth seafloor; some rhodoliths are fused into complex structures, locally some are fruticose (maërl), and others are partially buried by fine-grained sediment. The collected rhodoliths vary from fruticose in two sites to encrusting to lumpy, concentric and boxwork nodules in the rest; their size ranges from small (<1.5 cm) to large (~6 cm) and are mostly sub-spheroidal to spheroidal. A total of 16 red algal morpho-taxa were identified in the study sites. Two phases of growth can be distinguished in some rhodoliths by changes in color. The brownish inner cores yielded ages of 1600–1850 cal years before the present, whereas outer layers were much younger (180–50 years BP old). Growth layers appeared to have been separated by a long period of burial in the seafloor sediment. Other rhodoliths have ages of hundreds of years