La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Comparative Analysis of Phytoplankton Composition and Abundance over a Two-Decade Period at the Land-Ocean Boundary of a Tropical Mangrove Ecosystem
Auteurs :	Haimanti Biswas, Auteur ; Mitali Dey, Auteur ; Dipnarayan Ganguly, Auteur ; Tarun K. De, Auteur ; Sandip Ghosh, Auteur ; Tapan K. Jana, Auteur
Type de document :	Article
Dans :	Estuaries and Coasts (33(2) MAR 2010)
Article en page(s) :	384-394
Résumé :	Inter-annual variations of phytoplankton abundance and community organization were observed over a two-decade period along with the ancillary parameters at the land-ocean boundary associated with the Sundarban mangrove forest (21A degrees 32' and 22A degrees 40' N and 88A degrees 05' and 89A degrees E), along the NE Coast of the Bay of Bengal. The number of definable Bacillariophyceae species exceeded Dinophyceae taxa, and the total number of bloom-forming species declined from a maximum of ten in 2000 and a minimum of two in 2007. Blooms of the diatom Coscinodiscus radiatus were common in 2000 and 2007. Tide cycles and the onset of the monsoon season played important roles in diurnal and seasonal variability of phytoplankton. Phytoplankton biovolume showed seasonality, with the highest levels during post-monsoon periods and lowest levels during the monsoon period. Phytoplankton abundance was correlated to rainfall patterns, which may be altered by long-term changes in climate.

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