Estudio de las tramas tróficas asociadas a diferentes densidades de vieira Patagónica Zygochlamys patagonica del Atlántico SO mediante el uso de isótopos estables..
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Zygochlamys patagonica (King and Broderip, 1832) is an ecosystem engineer mollusk which forms aggregations or banks, of different densities, in the main frontal systems of the SW Atlantic Ocean. The objectives of this work were to analyze the composition, biomass, diversity and species richness of the benthic invertebrate assemblages at different scallop densities as well as the variability of their trophic webs at high and low scallop densities. For this, samples of the benthic invertebrate assemblages were taken at the Shelf Break Front with a non-selective epibenthic dredge. It was evaluated if the abundance (ind/m2) or biomass (colonial species, gr/m2) of the different taxa varied with scallop densities. The results showed that from 14 analyzed, the violet stars (Fam. Pterasteridae) and the epibenthic bivalve Hiatella meridionalis were the only species that had a positive correlation with the scallop density. The trophic web, analyzed by stable isotopes of carbon and nitrogen, show.....
Other TitleStudies on food webs associated to different densities of Patagonian scallop Zygochlamys patagonica from the SW Atlantic, using stable isotopes.
PublisherFacultad de Ciencias Exactas y Naturales
Mar del Plata (Argentina)
Spatial CoverageAtlántico Sudoccidental