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Open Access item Renewal time and the impact of harmful algal blooms on the extensive mussel raft culture of the Iberian coastal upwelling system (SW Europe)

Authors:Álvarez-Salgado, Xosé Antón
Labarta, Uxío
Fernández-Reiriz, María José
Figueiras, F. G.
Rosón, Gabriel
Piedracoba, Silvia
Filgueira, Ramón
Cabanas, J. M.
Keywords:Climate change, Coastal upwelling, Flushing time, Harmful microalgae, Mussel raft, NW Spain
Issue Date:4-May-2008
Publisher:Elsevier
Citation:Harmful Algae 7(6): 849-855 (2008)
Abstract:The extension and intensity of the upwelling season in the NW Iberian Peninsula (42°N–43°N) have decreased by 30 and 45% over the last 40 years, respectively. Accordingly, the renewal time (τ) of the Rías Baixas, four large coastal inlets where 15% of the World extraction of blue mussels occurs, has increased by 240%. We indirectly demonstrate here that the growing τ has caused the increasing occurrence of harmful microalgae in these embayments, dramatically affecting mussel raft cultivation. The equation D = 365(1 − exp(−τ/c1)) explains 80% of the variability of the number of days per year that mussels cannot be extracted from the hanging ropes because of the occurrence of harmful microalgae (D). The coefficient c1 = 37 ± 2 days indicates that an average τ over the upwelling season of >25 ± 1 or 50 ± 3 days reduce mussel extraction to only 50 or 25% of the year, respectively.
Description:7 pages, 4 figures.-- Printed version published in Oct 2008.
Publisher version (URL):http://dx.doi.org/10.1016/j.hal.2008.04.007
URI:http://hdl.handle.net/10261/9476
ISSN:1568-9883
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Appears in Collections:(IIM) Artículos

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