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Como os cambios no vento afectan ao potencial produtivo das rías galegas

Authors: Padín, Xosé Antonio; Pazos, Yolanda; Gilcoto, Miguel; Cabanas-López, José Manuel; Pardo, Paula; Doval, M. Dolores; Fariña, Luis; +1 Authors

Como os cambios no vento afectan ao potencial produtivo das rías galegas

Abstract

As rexións de afl oramento costeiro, unhas das áreasmáis produtivas dos océanos, estanse vendo afectadas pola variabilidade dos ventos nomarco do cambio climático.Ao contrario da hipótese xeral que predí un fortalecemento xeral do afl oramento costeiro, a análise de series temporais dos ventos no litoral galego entre o 1965 e o 2006 apuntan a unha diminución do afl oramento costeiro que está asociado a un cambio no patrón das isobaras durante o verán. O debilitamento do afl oramento ten importantes consecuencias tanto para os ecosistemas costeiros como para a explotación dos seus recursos. A plataforma costeira amosou unha perda signifi cativa da súa produción do 52% ao longo dos últimos 40 anos, que explica o 50% das variacións interanuais das capturas de sardiña ao longo domar Cantábrico.Amenor fertilización no interior das rías, asociada á menor chegada de nutrintes polo afl oramento, foi compensada polo aumento de procesos de remineralización in situ da materia orgánica, asociados a un maior tempo de residencia. O incremento do tempo de renovación das augas nas rías xunto co quencemento superfi cial aumentaron a estrafi cación da coluna de agua e afectaron á sucesión fi toplanctónica cun aumento da porcentaxe de dinofl axelados e unha diminución das diatomeas totais.Amaior presencia de dinofl axelados, organismos formadores de biotoxinas, reduce os períodos de extración do mexillón nas rías galegas

Este estudo foi parcialmente financiado pola Comisión Europea (Proxecto CARBOOCEAN; Contrato nº 511176) e pola Xunta de Galicia (PGIDIT05PXIC40203PM, PGIDIT08MMA014402PR, GIDIT07PXIB402153PR and PGIDIT05-MA40201PR)

17 pages, 5 figures.-- XXIV Ciclo cultivando o mar, XV Foro dos Recursos Mariños e da Acuicultura das Rías Galegas, O Grove 10-11 October 2012

Peer reviewed

Country
Spain
Related Organizations
Keywords

HABs, Acuicultura, Centro Oceanográfico de Vigo, Ecosistema costeiro, Cambio climático, Afloramento costeiro, Sucesión fitoplanctónica

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selected citations
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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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