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Provedor de dados:  ArchiMer
País:  France
Título:  Are epiphytes a significant component of intertidal Zostera noltii beds?
Autores:  Lebreton, Benoit
Richard, Pierre
Radenac, Gilles
Bordes, Monique
Breret, Martine
Arnaud, Christophe
Mornet, Francoise
Blanchard, Gerard F.
Data:  2009-08
Ano:  2009
Palavras-chave:  SEM
Cocconeis spp.
Epiphyte diatom
Zostera noltii
Intertidal seagrass bed
Primary producer
Resumo:  The role of epiphytes in an intertidal Zostera noltii seagrass bed in Marennes-Oleron Bay was assessed in comparison with the other main benthic primary producers (Z. noltii, microphytobenthos) at two bathymetric levels and on a seasonal basis. Assemblage and biomass of epiphytes were studied using scanning electron microscopy (SEM). Z noltii and its detrital matter followed a typical seasonal pattern: microphytobenthos was present in large quantities throughout the year representing 21% of the total biomass while detrital matter, above-ground parts and below-ground parts accounted for 65, 9 and 5%, respectively. Only two species of epiphytic diatoms, Cocconeis scutellum and Cocconeis placentula, were observed on seagrass leaves. Epiphyte biomass was very low, representing on average less than 0.001% of that of microphytobenthos or leaves. This low epiphyte biomass is linked with the absence of macroalgae and also with the low biovolume of Cocconeis, which formed a monolayer of cells on leaves. This can be explained by the severe conditions of the intertidal and the high leaf turn-over of Z. noltii leaves. (C) 2009 Elsevier B.V. All rights reserved.
Tipo:  Text
Idioma:  Inglês

Editor:  Elsevier
Formato:  application/pdf
Fonte:  Aquatic Botany (0304-3770) (Elsevier), 2009-08 , Vol. 91 , N. 2 , P. 82-90
Direitos:  2009 Elsevier B.V. All rights reserved.

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