Data/hora: 06/06/2024 11:37:12

Provedor de dados: 	5	
País: 	France	
Título: 	Ingestion of a bacterivorous ciliate by the oyster Crassostrea gigas: Protozoa as a trophic link between picoplankton and benthic suspension-feeders	
Autores: 	Le Gall, Solange; Bel Hassen, Malika; Le Gall, Pierre.	
Data: 	1997	
Ano: 	1997	
Palavras-chave: 	Oyster; Food sources; Picoplankton; Protozoa; Trophic link.	
Resumo: 	The linked concepts of 'microbial loop' and 'protozoan trophic link' have been very well documented in filter-feeding microzooplankton such as copepods, but have not been applied to energy transfer to benthic suspension-feeding macrofauna, with the exception of the recent demonstration of heterotrophic flagellate assimilation by mussels. The oyster Crassostrea gigas obtains energy resources by filtering microalgae (similar to 5 to 100 mu m). However, in turbid estuaries, light-limited phytoplanktonic production cannot entirely account for oyster energy requirements. Conversely, picoplankters (&lt;2 mu m), which are main effecters of coastal energy flow and matter cycling, are not efficiently retained by oyster filtration. Ciliate protozoal as both micro-sized cells (similar to 5 to 100 run) and bacteria grazers, may represent a major intermediary in trophic transfer between picoplankton and metazoa. The ciliate Uronema was intensely cultured and labelled, using the cyanobacteria Synechococcus as an auto-fluorescent biomarker. The labelled ciliates were offered as potential prey to oysters. We report here the first experimental evidence of a significant retention and ingestion of ciliates by oysters, supporting the role of protozoa as a realistic trophic link between picoplankters and filter-feeding bivalves and thus enhancing their potential importance in estuarine microbial food webs.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	http://archimer.ifremer.fr/doc/00337/44788/44482.pdf

DOI:10.3354/meps152301

http://archimer.ifremer.fr/doc/00337/44788/	
Editor: 	Inter-research	
Formato: 	application/pdf	
Fonte: 	Marine Ecology Progress Series (0171-8630) (Inter-research), 1997 , Vol. 152 , N. 1-3 , P. 301-306	
Fonte: 	Inter-Research 1997

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