Contrasting structural patterns of the mesozooplankton community result from the development of a frontal system in San José Gulf, Patagonia
| Autor: | Pedro J. Barón, Rodrigo D. Hernández-Moresino, Rosana Di Mauro, Jesus C. Compaire, Gabriela L. Villanueva-Gomila, Augusto César Crespi-Abril |
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| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Water mass 010504 meteorology & atmospheric sciences Otras Ciencias Biológicas Stratification (water) Aquatic Science Structural basin Oceanography MESOZOOPLANKTON 01 natural sciences purl.org/becyt/ford/1 [https] Ciencias Biológicas ZOOIMAGE Transition zone purl.org/becyt/ford/1.6 [https] 0105 earth and related environmental sciences Trophic level Biomass (ecology) 010604 marine biology & hydrobiology Community structure HYDRODYNAMIC CONDITIONS SAN JOSÉ GULF Hydrography COMMUNITY STRUCTURE CIENCIAS NATURALES Y EXACTAS Geology |
| Zdroj: | CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| ISSN: | 0272-7714 |
| Popis: | The structural patterns of the mesozooplankton community of San José Gulf (SJG), a one of a kind semi-enclosed basin located in the northern margin of the Valdés Peninsula (Argentine Patagonia), were studied by means of semi-automatic image analysis. Samples were obtained bimonthly during the warm season (October 2012?April 2013) at stations distributed on a regular grid. Cluster analyses outlined two spatially consistent groups of stations showing similar patterns when based on physical (SST, Chl-a, and bottom depth) and community structure (abundance, biomass, and slope of the size spectra) descriptors, each broadly distributed on one of two previously described hydrographic domains formed by the interaction of tidal circulation, coastal morphology, bottom topography, and seasonal vertical stratification. Examination of the slope of the mesozooplankton size spectra revealed that the stratified waters of the East Domain sustain higher proportions of small organisms and higher biomass, suggesting potentially low trophic transfer efficiency compared to its vertically-mixed West counterpart. Three-clustering analyses resulted in still spatially consistent groups of stations when based on the community descriptors, revealing the existence of a transition zone, presumably resulting from intermediate hydrodynamic conditions. Principal component analysis revealed that biomass of cladocerans modulates the size spectra and is related with distances from sampling stations to SJG´s mouth. Overall, a consistent spatial correlate was found between physical conditions of water masses and the structure of the mesozooplancton community contained within. Fil: Hernández Moresino, Rodrigo Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina Fil: Di Mauro, Rosana Patricia. State University of Louisiana; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Crespi Abril, Augusto Cesar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina. Universidad Nacional del Comahue; Argentina. Universidad Nacional de la Patagonia; Argentina Fil: Villanueva Gomila, Gabriela Lujan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina Fil: Cano Compaire, Jesus. Universidad de Cádiz; España Fil: Baron, Pedro Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina |
| Databáze: | OpenAIRE |
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