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Título : Biological characteristics of the hydrological landscapes in the Bay of Biscay in spring 2009
Autor : Lezama-Ochoa, Ainhoa; Grados, Daniel; Lebourges-Dhaussy, Anne; Chaigneau, Alexis; Bertrand, Arnaud; Irigoien, Xabier
Citación : FISHERIES OCEANOGRAPHY, 2015, 24, 26-41
Resumen : In the present study we investigated the biogeography of macrozooplankton and fish biomass in the Bay of Biscay. In this region, we defined six different landscapes based on the hydrogeographical characteristics observed in spring 2009. We then related landscape's characteristics and environmental parameters such as light attenuation depth and chlorophyll-a with macrozooplankton and fish acoustic biomass. Hydrodynamic structures together with coastal influences (river discharges, predation pressure and depth preference) and vertical thermohaline structure/mixing (feeding modes and ability to stay in preferred layers) appeared as the main factors determining the biological distribution. Besides, variance partitioning was used to assess the respective roles played by the hydrological environment, the geographical space and the biological environment alone, and their interactions. Results revealed that: (i) macrozooplankton and fish have a preference for different hydrogeographical landscapes; (ii) the association between hydrological conditions and geographical features, i.e. the spatial structure of the hydrological environment, plays a key role in the distribution of macrozooplankton; and (iii) prey-predator relationships have to be taken into account to provide a comprehensive characterization of habitat suitability.
Palabras clave : acoustics; Bay of Biscay; biogeography; fish; horizontal distribution patterns; hydrological structures; macrozooplankton; ANCHOVY ENGRAULIS-ENCRASICOLUS; INTERNAL SOLITON PACKETS; PHYTOPLANKTON GROWTH; ECOLOGICAL VARIATION; ZOOPLANKTON GROUPS; NEIGHBOR MATRICES; SOUTHERN BAY; ENVIRONMENT; SHELF; RECRUITMENT
Fecha de publicación : 2015
Editorial : WILEY-BLACKWELL
Tipo de documento: Article
Idioma: Inglés
DOI: 10.1111/fog.12090
URI : http://dspace.azti.es/handle/24689/296
ISSN : 1054-6006
E-ISSN: 1365-2419
Aparece en las tipos de publicación: Artículos científicos



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