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Assessment from space of mangroves evolution in the Mekong Delta, in relation to extensive shrimp farming ArchiMer
Tong, P. H. S; Auda, Y; Populus, Jacques; Aizpuru, M; Al Habshi, A. Al; Blasco, F.
This study is an attempt to produce an assessment of the impact of shrimp aquaculture in the Mekong Delta (Viet Nam) on mangrove ecosystems. For this exercise we selected two sub-areas (Ca Mau and Tra Vinh provinces) encompassing a variety of land uses and ecological conditions. Twenty stations in Tra Vinh and 15 stations in Ca Mau have been surveyed several times from September 2000 to March 2002. Field investigations included mangrove soils studies, measurements of pH and salinity of the water, analysis of mangrove flora, and density and structure of the vegetation. Four Systeme Probatoire de l'Observation de la Terre (SPOT) scenes were used for the discrimination of mangrove types and for the delineation of landscape units. For the first time, five...
Tipo: Text Palavras-chave: Crevette; Aquiculture; Exploitation agricole; Mangrove; Discrimination; Indice végétation; Extrême Orient; Asie; Macrura; Decapoda; Crustacea; Arthropoda; Invertebrata.
Ano: 2004 URL: https://archimer.ifremer.fr/doc/2004/publication-2303.pdf
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Développement durable de l’aquaculture dans le delta du Mékong : Quelle place pour la télédétection dans le projet pluridisciplinaire GAMBAS de la Communauté Européenne ? ArchiMer
Auda, Yves; Populus, Jacques; Blasco, F.
GAMBAS est un programme de la Commission Européenne de recherche sur le développement durable de l'aquaculture dans le delta du Mékong. La pluridisciplinarité des équipes impliquées dans ce programme a permis de cerner précisément l'impact de l'aquaculture sur l'écosystème « mangrove ». Dans cette action, la télédétection a joué un rôle fédérateur des connaissances acquises au cours des quatre années de collaboration franco-vietnamienne (2001-2004). Les données botanique, d 'écologie aquatique et de socio-économie collectées dans une quarantaine de stations réparties dans deux provinces (Camau et TraVinh) sont analysées conjointement grâce au lien spatial assuré par la télédétection. Plus précisément, une zonation écologique, un indice de confinement ...,...
Tipo: Text Palavras-chave: Mangrove; Télédétection; Mékong(Vietnam).
Ano: 2007 URL: http://archimer.ifremer.fr/doc/00197/30863/29231.pdf
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Ecosystemes mangroves: Fonctionnement, utilite, evolution ArchiMer
Blasco, F.
Concerning the basic functioning of mangrove ecosystems, three groups of key factors are examined and explained. Several parameters external to these ecosystems have a strong influence; i.e. - the regular and abundant input from fresh water sources; - provision of nutrients; - the stabiity of the substrata. Each of these groups of factors is related to a number of parameters which do not lend themselves to in situ studies. For example, the stability of the substrata depends on the sedimentation load which itself is linked to the geological nature of the basin, land utilization, local climate, etc. The principal cause of the decline in mangroves is analyzed.
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Ano: 1982 URL: http://archimer.ifremer.fr/doc/00246/35749/34257.pdf
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