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Artículo

Influence of a tidal front on zooplankton abundance, assemblages and life histories in Península Valdés, Argentina

Derisio, Carla MaríaIcon ; Alemany, DanielaIcon ; Acha, Eduardo MarceloIcon ; Mianzan, Hermes WalterIcon
Fecha de publicación: 09/2014
Editorial: Elsevier Science
Revista: Journal Of Marine Systems
ISSN: 0924-7963
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ciencias Biológicas

Resumen

The complex biophysical interactions that occur in Península Valdés tidal front offer an appropriate scenario to study how zooplankton species respond to the environmental setting. In that sense, we studied why some zooplankton assemblages come to dominate in certain areas, focusing on the differential use that each life history stage makes on the hydrodynamic regimes. Environmental data and zooplankton samples were taken across the tidal front, covering well-mixed, frontal and stratified waters. Zooplankton abundance, assemblage structure, specific composition and life histories were analyzed in relation to depth, temperature, stratification level of the water column and chlorophyll a. Zooplankton-specific composition did not vary across the different zones of the front but, due to differences in relative abundance, three assemblages were detected in coincidence with the three zones analyzed. Most zooplankton adult groups and early life stages were related to the stratification level of the water column. This environmental factor best explained the coupling of the three different zooplankton assemblages with the three zones of the frontal system. This distributional pattern was clearly observed in the copepods group. Despite different copepod species prevailing in different parts of the tidal front, the frontal interface appears to be an important breeding area for all copepod species. The stratification level would be the main factor responsible for the zooplankton distributional pattern across the tidal front, although other physical and biological processes, such as transport, retention and life history strategies could be conditioning the establishment of different zooplankton populations in this complex frontal system.
Palabras clave: Zooplankton Distribution , Specific Composition , Turbulence , Stratification , Ecological Processes , Patagonian Shelf
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/34761
DOI: http://dx.doi.org/10.1016/j.jmarsys.2014.08.019
URL: https://www.sciencedirect.com/science/article/pii/S092479631400219X
Colecciones
Articulos(IIMYC)
Articulos de INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS
Articulos(CCT - MAR DEL PLATA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - MAR DEL PLATA
Citación
Derisio, Carla María; Alemany, Daniela; Acha, Eduardo Marcelo; Mianzan, Hermes Walter; Influence of a tidal front on zooplankton abundance, assemblages and life histories in Península Valdés, Argentina; Elsevier Science; Journal Of Marine Systems; 139; 9-2014; 475-482
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