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dc.contributor.authorLouzao, Maite
dc.contributor.authorNavarro, Joan
dc.contributor.authorDelgado-Huertas, Antonio
dc.contributor.authorGil de Sola, Luis
dc.contributor.authorForero, Manuela G.
dc.date.accessioned2018-06-29T10:20:48Z-
dc.date.available2018-06-29T10:20:48Z-
dc.date.issued2017
dc.identifierISI:000403513400012
dc.identifier.citationDEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY, 2017, 140, 117-126
dc.identifier.issn0967-0645
dc.identifier.urihttp://dspace.azti.es/handle/24689/451-
dc.description.abstractEcotones can be described as transition zones between neighbouring ecological systems that can be shaped by environmental gradients over a range of space and time scales. In the marine environment, the detection of ecotones is complex given the highly dynamic nature of marine systems and the paucity of empirical data over ocean-basin scales. One approach to overcome these limitations is to use stable isotopes from animal tissues since they can track spatial oceanographic variability across marine systems and, in turn, can be used as ecological tracers. Here, we analysed stable isotopes of deep-sea fishes to assess the presence of ecological discontinuities across the western Mediterranean. We were specifically interested in exploring the connection between deep-sea biological activity and particular oceanographic features (i.e., surface fronts) occurring in the pelagic domain. We collected samples for three different abundant deep-sea species in May 2004 from an experimental oceanographic trawling cruise (MEDITS): the Mictophydae jewel lanternfish Lampanyctus crocodilus and two species of the Gadidae family, the silvery pout Gadiculus argenteus and the blue whiting Micromesistius poutassou. The experimental survey occurred along the Iberian continental shelf and the upper and middle slopes, from the Strait of Gibraltar in the SW to the Cape Creus in the NE. The three deep-sea species were highly abundant throughout the study area and they showed geographic variation in their isotopic values, with decreasing values from north to south disrupted by an important change point around the Vera Gulf. Isotopic latitudinal gradients were explained by pelagic oceanographic conditions along the study area and confirm the existence of an ecotone at the Vera Gulf. This area could be considered as an oceanographic boundary where waters of Atlantic origin meet Mediterranean surface waters forming important frontal structures such as the Almeria-Oran front. In fact, our results relate geographical variation in stable isotopes of deep-sea fishes to regional changes in surface oceanography, highlighting the importance of mesoscale oceanographic features.
dc.language.isoeng
dc.publisherPERGAMON-ELSEVIER SCIENCE LTD
dc.subjectEcotones
dc.subjectStable isotopes
dc.subjectOceanographic spatial variability
dc.subjectDeep-sea fish
dc.subjectWestern Mediterranean
dc.subjectDEMERSAL FISH
dc.subjectMEDITERRANEAN SEA
dc.subjectCONTINENTAL-SHELF
dc.subjectBODY CONDITION
dc.subjectNEW-ZEALAND
dc.subjectINSIGHTS
dc.subjectSEABIRD
dc.subjectSIZE
dc.titleSurface oceanographic fronts influencing deep-sea biological activity: Using fish stable isotopes as ecological tracers
dc.typeArticle; Proceedings Paper
dc.identifier.journalDEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
dc.format.page117-126
dc.format.volume140
dc.contributor.funderSpanish Government [P06-RNM-02362, REN2002-00450, BOS2003-01960, CGL2006-04325/BOS]
dc.contributor.funderBalearic Government [FPI02-72474662Y]
dc.contributor.funderRamon y Cajal [RYC-2012-09897]
dc.contributor.funderAndalucia Talent Hub Program [291780]
dc.contributor.funderEuropean Union's Seventh Framework Program
dc.contributor.funderMarie Sklodowska-Curie Actions
dc.contributor.funderMinistry of Economy, Industry and Competitiviness
dc.contributor.funderEnploymnet of the Junta de Andalucia, Spain
dc.contributor.funderMarine Research Division (AZTI) [796]
dc.identifier.e-issn1879-0100
dc.identifier.doi10.1016/j.dsr2.2016.10.012
Aparece en las tipos de publicación: Artículos científicos



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