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The importance of tidal pumping in a Mediterranean lagoon

By Alejandro J. Souza, Victor F. Camacho-Ibar, Reginaldo Durazo and Leslie Aveytua

Abstract

San Quintin Bay is probably the richest Coastal lagoon in the Baja Californian Pacific; it sustains an oyster production of 2000 Tons per year. San Quintin Bay is a mediterranean lagoon, this means that it does not have any freshwater sources and that its subtidal dynamics are those of an inverse or a thermal estuary. The conundrum to answer is: if there is no freshwater there are no nutrients or carbon inputs from land, so where do the carbon and nutrients come from? San Quintin is located in the Californias upwelling region, one of the richest shelf seas, thus the source of carbon and nutrients must be the adjacent Pacific Ocean. The question is: how do these nutrients get into the lagoon? The nutrients can only successfully get in the lagoon following this series of events: first you need to have an upwelling period that will bring nutrients to the Baja California Shelf and result in increased primary productivity, the upwelling should be at or just before spring tides so that the large amount of nutrients and primary productivity are transported into the Bay via tidal pumpin

Topics: Marine Sciences
Publisher: Estuarine Research Foundation
Year: 2007
OAI identifier: oai:nora.nerc.ac.uk:3604
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