| one publication added to basket [7131] | Système de surveillance des peuplements benthiques des étangs de Berre et de Vaïne: mise au point d'une nouvelle stratègie = Monitoring system of benthic macrophytes communities in Berre and Vaïne lagoons: development of a new strategy
Soltan, D.; Francour, P. (2000). Système de surveillance des peuplements benthiques des étangs de Berre et de Vaïne: mise au point d'une nouvelle stratègie = Monitoring system of benthic macrophytes communities in Berre and Vaïne lagoons: development of a new strategy. J. Rech. Océanogr. 25(3-4): 53-57
In: Journal de Recherche Océanographique. Union des Océanographes de France: Paris. ISSN 0397-5347, more
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| Abstract |
In 1995, after a significant collapse of all macrophyte communities, we proposed a new survey strategy, based on quantitative data. Studied taxons include 3 phanerogams and 5 algae. A total of 31 transects 100 m long and 1 m wide were defined all around Berre and Vaïne lagoons. For each studied species, the cover was estimated over 5m² (20 measures along one transect) and the frequency calculated as the number of occurrences on 5 m²-unitary surfaces along the transect. Both data were synthesized into a mean abundance index form which express, on each transect, the species importance. Cluster analysis (by joining clustering and k-means clustering) data allow to identify different sectors in Berre and Vaïne lagoons, characterized by some dominant taxons, and to assess the steady impoverishment of communities in accordance to abiotic conditions. |
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