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Provedor de dados:  ArchiMer
País:  France
Título:  Impact of the Phaeocystis globosa spring bloom on the intertidal benthic compartment in the eastern English Channel: A synthesis
Autores:  Spilmont, Nicolas
Denis, Lucie
Artigas, Luis Felipe
Caloin, Frederic
Courcot, Lucie
Creach, Anne
Desroy, Nicolas
Gevaert, Francois
Hacquebart, Pascal
Hubas, Cedric
Janquin, Marie-andree
Lemoine, Yves
Luczak, Christophe
Migne, Aline
Rauch, Mathieu
Davoult, Dominique
Data:  2009
Ano:  2009
Palavras-chave:  Macrozoobenthos
Saccharina latissima
Benthic fluxes
Phaeocystis globosa
Resumo:  From 1999 to 2005, studies carried out in the frame of regional and national French programs aimed to determine whether the Phaeocystis globosa bloom affected the intertidal benthic communities of the French coast of the eastern English Channel in terms of composition and/or functioning. Study sites were chosen to cover most of the typical shore types encountered on this coast (a rocky shore, an exposed sandy beach and a small estuary). Both the presence of active Phaeocystis cells and their degradation product (foam) did have a significant impact on the studied shores. The primary production and growth rates of the kelp Saccharina latissima decreased during the bloom because of a shortage of fight and nutrient for the macroalgae. On sandy sediments, the benthic metabolism (community respiration and community primary production), as well as the nitrification rate, were enhanced during foam deposits, in relation with the presence of bacteria and active pelagic cells within the decaying colonies. In estuarine sediments, the most impressive impact was the formation of a crust at the sediment surface due to drying foam. This led to anoxic conditions in the surface sediment and resulted in a high mortality among the benthic community. Some organisms also tended to migrate upward and were then directly accessible to the higher trophic level represented by birds. Phaeocystis then created a shortcut in the estuarine trophic network. Most of these modifications lasted shortly and all the systems considered came back to their regular properties and activities a few weeks after the end of the bloom, except for the most impacted estuarine area. (C) 2008 Elsevier Ltd. All rights reserved.
Tipo:  Text
Idioma:  Inglês

Editor:  Elsevier
Formato:  application/pdf
Fonte:  Marine Pollution Bulletin (0025-326X) (Elsevier), 2009 , Vol. 58 , N. 1 , P. 55-63
Direitos:  2009 Elsevier Ltd All rights reserved.

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