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Título: | Seasonal forcing of image-analysed mesozooplankton community composition along the salinity gradient of the Guadalquivir estuary |
Autor: | Taglialatela, S. CSIC; Ruiz Segura, Javier ; Prieto, Laura CSIC ORCID ; Navarro, Gabriel CSIC ORCID | Palabras clave: | Zooplankton Estuarine species Spanish estuaries Calanipeda aquaedulcis Acartia clausi Automatic classification ZooImage |
Fecha de publicación: | 5-ago-2014 | Editor: | Elsevier | Citación: | Estuarine, Coastal and Shelf Science 149: 244-254 (2014) | Resumen: | The composition and distribution of the mesozooplankton was studied monthly from April 2008 to June 2009 in the Guadalquivir estuary using a fast image analysis technique as well as with traditional microscope counting. The mesozooplankton showed a very clear temporal and spatial pattern with peaks of abundance in late-Spring/early-Summer 2008 and Spring 2009 in the inner estuary. The abundances peaked at 135 × 103 ind. m−3. Calanipeda aquaedulcis was the most abundant species in the fresh and brackish waters (salinity between 0.5 and 7), accounting in many cases for up to 100% of the individuals. Acartia clausi instead was identified as the most abundant species in the middle part of the estuary (salinity between 10 and 30). Cyclopoida of the family Cyclopidae (possibly Acanthocyclops spp.) were occasionally abundant there as well as some species of freshwater Cladocera. At the mouth, the mesozooplanktonic community included appendicularians, chaetognaths, copepods and Cladocera. Canonical Correspondence Analysis (CCA) indicates that the changes observed in the taxonomic composition along the estuary were strictly correlated with the salinity gradient. Furthermore, no evidence of seasonal species substitution was observed in the Guadalquivir estuary, whereas a clear spatial displacement of C. aquaedulcis and A. clausi populations was observed after large discharges from the dam in Alcala del Rio. | Versión del editor: | https://doi.org/10.1016/j.ecss.2014.08.021 | URI: | http://hdl.handle.net/10261/170549 | DOI: | 10.1016/j.ecss.2014.08.021 | ISSN: | 0272-7714 |
Aparece en las colecciones: | (ICMAN) Artículos |
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