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Are epiphytes a significant component of intertidal Zostera noltii beds? ArchiMer
Lebreton, Benoit; Richard, Pierre; Radenac, Gilles; Bordes, Monique; Breret, Martine; Arnaud, Christophe; Mornet, Francoise; Blanchard, Gerard F..
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...
Tipo: Text Palavras-chave: SEM; Cocconeis spp.; Epiphyte diatom; Microphytobenthos; Zostera noltii; Intertidal seagrass bed; Primary producer.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6589.pdf
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The influence of vegetal cover on carbon assimilation by Prochilodus lineatus (Characiformes: Prochilodontidae) in the upper Paraná river floodplain Biological Sciences
Serragiotto, Mariana Cristina; Universidade Estadual de Maringá; Souza Filho, Edvard Elias de; Universidade Estadual de Maringá; Couto, Edivando Vitor do; Universidade Estadual de Maringá; Manetta, Gislaine Iachstel; Universidade Estadual de Maringá; Benedito, Evanilde; Universidade Estadual de Maringá.
The present study examined the influence of the availability of riparian vegetation and C3 emergent aquatic macrophytes on carbon assimilation by Prochilodus lineatus. The vegetal cover of these producers, available at 30 m of the bank, for the terrestrial ecosystem of the rivers Baia, Ivinheima and Paraná, was quantified with the image processing Landsat 5 TM, of the year 2000, period of sampling of the biological material at each river. The assimilation of the energy sources (riparian vegetation and C3 aquatic macrophytes, C4 aquatic macrophytes, periphyton, and phytoplankton) by P. lineatus was determined by analysis of stable carbon isotopes (δ13C). The area of vegetal cover was estimated at 1,017 km2 in the Ivinheima river, 669 km2 in the Paraná...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Primary producer; Remote sensing; Stable isotopes; Fish Ecologia.
Ano: 2014 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/19820
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