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Modeling the impact of oyster culture on a mudflat food web in Marennes-Oleron Bay (France) ArchiMer
Leguerrier, D; Niquil, Nathalie; Petiau, A; Bodoy, Alain.
We used a carbon-based food web model to investigate the effects of oyster cultivation on the ecosystem of an intertidal mudflat. A previously published food web model of a mudflat in Marennes-Oleron Bay, France, was updated with revised parameters, and a realistic surface area and density of existing oyster cultures on the mudflat. We developed 2 hypothetical scenarios to estimate the impact of oyster cultivation on the food web structure of the ecosystem: one with no oysters, the other with a doubled area devoted to cultivated oysters in the bay. Oysters are direct trophic competitors of other filter feeders, and their presence modifies benthic-pelagic coupling by forcing a shift from pelagic consumers to benthic consumers. Increasing the surface area of...
Tipo: Text Palavras-chave: Carbon flux; Inverse analysis; Food web; Network analysis; Bivalve culture.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/00000/10816/7583.pdf
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Zooplankton interactions with the oxygen minimum zone in the eastern south pacific Gayana
Escribano,Rubén.
Zooplankton in the coastal upwelling zone off the eastern South Pacific must cope with a shallow oxygen minimum zone. In this work, I summarize available information on the zooplankton species that interact with the OMZ in the upwelling region off northern Chile. Data are available from the MinOx cruise carried out in March 2000 and the ZOMEI cruise perfomed in October 2005, both onboard the R/V Vidal Gormaz of the Chilean navy. Nineteen species of copepods and 10 of euphausiids were analyzed in their vertical distribution and migrating behavior. Several abundante species appeared constrained by the OMZ and restricted to the upper 50m layer. However, other abundant species inhabit temporarily or permanently the OMZ contributing substantially to the...
Tipo: Journal article Palavras-chave: Carbon flux; Copepods; Euphausiids; Vertical migration; Zooplankton.
Ano: 2006 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382006000300005
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