Structure de la communauté de zooplancton du plateau du MacKenzie (mer de Beaufort)

Authors: Darnis, Gérald
Advisor: Fortier, Louis
Abstract: The objective of my study was to describe the biogeography of the zooplankton in the southeastern Beaufort Sea in the fall 2002 by means of multivariate and indicator species analysis. A neritic community characterized by herbivory and the dominant taxon Pseudocalanus spp., occurred on the Mackenzie shelf and in Franklin Bay. Two oceanic communities, in which omnivore and carnivore feeding modes dominated, were located in the Amundsen Gulf Polynya and over the continental slope respectively. The polynya assemblage displayed the highest biomass with the dominant species Calanus hyperboreus, Metridia longa, Oithona similis, and Oncaea borealis as indicator species. This repartition of zooplankton assemblages was influenced mostly by the topography and the ice cover dynamic during the season of high biological production. Hence, it is predicted that a reduction in ice cover, as anticipated in the present context of global warming, will alter the distribution patterns of zooplankton, a key element of the marine ecosystem in the Arctic.
Document Type: Mémoire de maîtrise
Issue Date: 2007
Open Access Date: 12 April 2018
Permalink: http://hdl.handle.net/20.500.11794/19069
Grantor: Université Laval
Collection:Thèses et mémoires

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