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Title: Seasonal variations of phytoplankton community in relation to environmental factors in an oligotrophic area of the European Atlantic coast (southeastern Bay of Biscay)
Authors: Muniz, Oihane; German Rodriguez, Jose; Revilla, Marta and Laza-Martinez, Aitor; Seoane, Sergio; Franco, Javier
Citation: REGIONAL STUDIES IN MARINE SCIENCE, 2018, 17, 59-72
Abstract: In the present study, seasonal variability of physico-chemical variables and phytoplankton community as well as their relationships were studied for oligotrophic coastal waters of southeastern Bay of Biscay. During a 4-year period (2012-2015), a total of 265 phytoplankton taxa were identified, mainly represented by dinoflagellates and diatoms. The highest cell abundances were usually found in spring, mainly attributed to diatoms. Similarly, the biggest contribution to total biomass was given by diatoms: highest values (geometric mean) were found in winter and spring. Although phytoplankton abundance was mostly composed of small cells (2-20 mu m), biomass was similarly represented in the 2-20 mu m and >20 mu m size ranges. Between 21 and 29\% of total species variability was significantly explained by different physico-chemical variables. However, this percentage was notably lower at the level of major taxonomic groups. In general, nutrients (mainly ammonium and phosphate) and temperature explained the highest percentage of species variability, whilst salinity played an important role in the summer months. Among the potentially toxic taxa, Dinophysis and Phalacroma species in summer and autumn appeared associated with relatively high ammonium concentrations. (c) 2017 Elsevier B.V. All rights reserved.
Keywords: Phytoplankton biomass; Abundance; Taxonomic composition; Toxic species; Basque coast; TERM TIME-SERIES; MYTILUS-GALLOPROVINCIALIS; SIZE DISTRIBUTION; WATER-QUALITY; WADDEN SEA; GROWTH; NW; NUTRIENT; FOOD; EUTROPHICATION
Issue Date: 2018
Publisher: ELSEVIER SCIENCE BV
Type: Article
Language: English
DOI: 10.1016/j.rsma.2017.11.011
URI: http://dspace.azti.es/handle/24689/853
ISSN: 2352-4855
Funder: URA
Basque Water Agency
AZTI-Tecnalia
Department of Economic Development and Competitiveness of the Basque Government (BOPV) [201, 2013/4467, IM16SIMMA]
Appears in Publication types:Artículos científicos



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