FN Archimer Export Format PT J TI Are epiphytes a significant component of intertidal Zostera noltii beds? BT AF LEBRETON, Benoit RICHARD, Pierre RADENAC, Gilles BORDES, Monique BRERET, Martine ARNAUD, Christophe MORNET, Francoise BLANCHARD, Gerard F. AS 1:1;2:1;3:1;4:2;5:1;6:3;7:3;8:1; FF 1:;2:;3:;4:;5:;6:;7:;8:; C1 Univ La Rochelle, UMR Littoral Environm & Soc LIENSs, UMR 6250, CNRS,Inst Littoral & Environm, F-17042 La Rochelle, France. Univ La Rochelle, Ctr Commun Anal, FR EDD 3097, CNRS, F-17071 La Rochelle 9, France. IFREMER, CNRS, UMS ELA, UMS 3109, F-17137 Lhoumeau, France. C2 UNIV LA ROCHELLE, FRANCE UNIV LA ROCHELLE, FRANCE IFREMER, FRANCE IN WOS Ifremer jusqu'en 2018 copubli-france copubli-univ-france IF 1.697 TC 30 UR https://archimer.ifremer.fr/doc/2009/publication-6589.pdf LA English DT Article DE ;SEM;Cocconeis spp.;Epiphyte diatom;Microphytobenthos;Zostera noltii;Intertidal seagrass bed;Primary producer AB 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. PY 2009 PD AUG SO Aquatic Botany SN 0304-3770 PU Elsevier VL 91 IS 2 UT 000267627000005 BP 82 EP 90 DI 10.1016/j.aquabot.2009.03.003 ID 6589 ER EF