Six bimonthly surveys during 2007 were carried out in Magdalena Bay (Mexico) during spring tide conditions. Spatiotemporal variations of temperature, salinity, nitrite, nitrate, ammonium, phosphate and chlorophyll-a were analyzed in the Bay. During spring-early summer (April-June) seawaters were colder and richer in new nutrients and chlorophyll-a than autumn and winter (February and October-December). The coastal upwelling during spring-early summer contributes with new nutrients to the Bay, whereas bottom-recycled nutrients should be the main input during the autumn-winter period. Thus, nutrients availability, dissolved inorganic nitrogen and phosphate, promote a seasonal pattern of phytoplankton biomass in Magdalena Bay.
Cervantes-Duarte, R., López-López, S., Aguirre-Bahena, F., González-Rodríguez, E., & Futema-Jiménez, S. (2012). Relevance of new and regenerated nitrogen sources in the water column of magdalena bay (SW baja California Peninsula), Mexico. Revista de Biologia Marina y Oceanografia, 587-592. https://doi.org/10.4067/S0718-19572012000300021