La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Phytoplankton Biomass and Production in Subtropical Hong Kong Waters: Influence of the Pearl River Outflow
Auteurs :	Alvin Y. T. Ho, Auteur ; Jie Xu, Auteur ; Kedong Yin, Auteur ; Yuelu Jiang, Auteur ; Xiangcheng Yuan, Auteur ; Lei He, Auteur ; Donald M. Anderson, Auteur ; Joseph H. W. Lee, Auteur ; Paul J. Harrison, Auteur
Type de document :	Article
Dans :	Estuaries and Coasts (33(1) JAN 2010)
Article en page(s) :	170-181
Résumé :	The size-fractionated phytoplankton biomass and primary production were investigated in four contrasting areas of Hong Kong waters in 2006. Phytoplankton biomass and production varied seasonally in response to the influence of the Pearl River discharge. In the dry season, the phytoplankton biomass and production were low ( 10 mu g chlaL(-1)) rarely occurred despite the high chl-specific photosynthetic rate (mostly > 10 mu g C mu g chla(-1)day(-1)) as the accumulation of algal biomass was restricted by active physical processes (e.g., strong vertical mixing and freshwater dilution). Phytoplankton biomass and production were mostly dominated by the >5-mu m size fraction all year except in eastern waters during spring and mostly composed of fast-growing chain-forming diatoms. In the stratified southern waters in summer, the largest algal blooms occurred in part due to high nutrient inputs from the Pearl River estuary.

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