Effects of interannual events (1997–2012) on the hydrography and phytoplankton biomass of Sebastián Vizcaíno Bay

Effects of interannual events (1997–2012) on the hydrography and phytoplankton biomass of Sebastián Vizcaíno Bay

Sebastián Vizcaíno Bay (Baja California Peninsula, Mexico) presents hydrographic conditions and phytoplankton biomass corresponding to a temperate/subtropical transition zone affected by large-scale tropical and subtropical events and those events originating in the subpolar Pacific region. Conditio...

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Autores principales: Martínez-Fuentes, Luz María, Gaxiola-Castro, Gilberto, Gómez-Ocampo, Eliana, Kahru, Mati
Formato: info:eu-repo/semantics/article
Lenguaje:eng
Publicado: Iniversidad Autónoma de Baja California 2016
Acceso en línea:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2626
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language eng
description Sebastián Vizcaíno Bay (Baja California Peninsula, Mexico) presents hydrographic conditions and phytoplankton biomass corresponding to a temperate/subtropical transition zone affected by large-scale tropical and subtropical events and those events originating in the subpolar Pacific region. Conditions in the first 50 m depth of the bay are mostly temperate (average temperature: 15.5 ºC; average salinity: 33.6) and mesotrophic (phytoplankton biomass: >1 mg m–3). During spring and summer the bay is heavily influenced by the water transported by the California Current and the coastal upwelling generated off Punta Canoas. During the rest of the year the hydrography and phytoplankton biomass are mostly associated with subtropical conditions. The ENSO events arising in the period 1997–2012 affected the bay’s water column. The extreme 1997–1998 El Niño generated increases of ~8 ºC in temperature and ~0.8 in salinity. Local dynamic processes decreased the effects of moderate and weak El Niño events on phytoplankton biomass, with possible changes in the plankton functional groups. Due to the mostly temperate environment of the bay, the moderate 1998–2000 and 2010–2011 La Niña events did not generate a substantial change in the hydrography and phytoplankton biomass. However, the abundant subarctic water inflow in the period 2002–2006 abruptly decreased salinity and led to increased stratification of the water column and a reduction in phytoplankton chlorophyll.
format info:eu-repo/semantics/article
author Martínez-Fuentes, Luz María
Gaxiola-Castro, Gilberto
Gómez-Ocampo, Eliana
Kahru, Mati
spellingShingle Martínez-Fuentes, Luz María
Gaxiola-Castro, Gilberto
Gómez-Ocampo, Eliana
Kahru, Mati
Effects of interannual events (1997–2012) on the hydrography and phytoplankton biomass of Sebastián Vizcaíno Bay
author_facet Martínez-Fuentes, Luz María
Gaxiola-Castro, Gilberto
Gómez-Ocampo, Eliana
Kahru, Mati
author_sort Martínez-Fuentes, Luz María
title Effects of interannual events (1997–2012) on the hydrography and phytoplankton biomass of Sebastián Vizcaíno Bay
title_short Effects of interannual events (1997–2012) on the hydrography and phytoplankton biomass of Sebastián Vizcaíno Bay
title_full Effects of interannual events (1997–2012) on the hydrography and phytoplankton biomass of Sebastián Vizcaíno Bay
title_fullStr Effects of interannual events (1997–2012) on the hydrography and phytoplankton biomass of Sebastián Vizcaíno Bay
title_full_unstemmed Effects of interannual events (1997–2012) on the hydrography and phytoplankton biomass of Sebastián Vizcaíno Bay
title_sort effects of interannual events (1997–2012) on the hydrography and phytoplankton biomass of sebastián vizcaíno bay
publisher Iniversidad Autónoma de Baja California
publishDate 2016
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2626
_version_ 1792610798022950912
spelling repositorioinstitucional-20.500.12930-75042023-05-09T14:31:00Z Effects of interannual events (1997–2012) on the hydrography and phytoplankton biomass of Sebastián Vizcaíno Bay Efectos de eventos interanuales (1997–2012) sobre la variabilidad hidrográfica y biomasa del fitoplancton en bahía Sebastián Vizcaíno Martínez-Fuentes, Luz María Gaxiola-Castro, Gilberto Gómez-Ocampo, Eliana Kahru, Mati Sebastián Vizcaíno Bay (Baja California Peninsula, Mexico) presents hydrographic conditions and phytoplankton biomass corresponding to a temperate/subtropical transition zone affected by large-scale tropical and subtropical events and those events originating in the subpolar Pacific region. Conditions in the first 50 m depth of the bay are mostly temperate (average temperature: 15.5 ºC; average salinity: 33.6) and mesotrophic (phytoplankton biomass: >1 mg m–3). During spring and summer the bay is heavily influenced by the water transported by the California Current and the coastal upwelling generated off Punta Canoas. During the rest of the year the hydrography and phytoplankton biomass are mostly associated with subtropical conditions. The ENSO events arising in the period 1997–2012 affected the bay’s water column. The extreme 1997–1998 El Niño generated increases of ~8 ºC in temperature and ~0.8 in salinity. Local dynamic processes decreased the effects of moderate and weak El Niño events on phytoplankton biomass, with possible changes in the plankton functional groups. Due to the mostly temperate environment of the bay, the moderate 1998–2000 and 2010–2011 La Niña events did not generate a substantial change in the hydrography and phytoplankton biomass. However, the abundant subarctic water inflow in the period 2002–2006 abruptly decreased salinity and led to increased stratification of the water column and a reduction in phytoplankton chlorophyll. Bahía Sebastián Vizcaíno (península de Baja California, México) presenta condiciones hidrográficas y biomasa del fitoplancton correspondientes a una zona transicional subtropical-templada, afectada por eventos tropicales y subtropicales de gran extensión espacial y temporal, y por eventos originados en la región subpolar del Pacífico. En los primeros 50 m de profundidad de la bahía, el ambiente es mayormente templado (temperatura promedio: 15.5 ºC; salinidad promedio: 33.6) y mesotrófico (biomasa del fitoplacton: >1 mg m–3). Durante primavera y verano la bahía está fuertemente influenciada por el agua transportada por la corriente de California y por las surgencias costeras generadas frente a punta Canoas. Durante el resto del año la hidrografía y biomasa del fitoplancton corresponden mayormente a condiciones sobtropicales. Los eventos de ENSO en el periodo 1997–2012 impactaron la columna de agua de la bahía. El Niño 1997–1998, que fue el de mayor magnitud, generó incrementos de ~8 ºC en la temperatura y de ~0.8 en la salinidad de la columna de agua. Los procesos dinámicos locales disminuyeron los efectos de los eventos de El Niño moderados y débiles sobre la biomasa del fitoplancton, aunque posiblemente hubo efectos en los grupos funcionales del plancton. Debido al ambiente mayormente templado de la bahía, los eventos moderados de La Niña 1998–2000 y La Niña 2010–2011 no tuvieron un cambio sustancial en la hidrografía ni en la biomasa del fitoplancton. Sin embargo, el ingreso de agua subártica en el periodo 2002–2006 disminuyó abruptamente la salinidad, lo que resultó en mayor estratificación de la columna de agua y reducción de la clorofila del fitoplancton. Palabras clave: variabilidad de largo plazo, hidrografía, clorofila, ciclo ENSO, bahía Sebastián Vizcaíno 2016-06-15 2021-06-03T03:55:31Z 2021-06-03T03:55:31Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2626 10.7773/cm.v42i2.2626 https://hdl.handle.net/20.500.12930/7504 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2626/1594 Copyright (c) 2016 Ciencias Marinas application/pdf Iniversidad Autónoma de Baja California Ciencias Marinas; Vol. 42 No. 2 (2016); 81-97 Ciencias Marinas; Vol. 42 Núm. 2 (2016); 81-97 2395-9053 0185-3880

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