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| Format: | Artículo científico |
| Language: | en |
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Universidad Autónoma de Baja California
2017
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| Online Access: | https://www.redalyc.org/articulo.oa?id=48054149002 |
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Table of Contents:
- Phytoplankton biomass and production off the Baja California Peninsula: 1997–2016 Martín E De la Cruz-Orozco Eliana Gómez-Ocampo Luis E Miranda-Bojórquez Jushiro Cepeda-Morales Reginaldo Durazo Bertha E Lavaniegos Teresa L Espinosa-Carreón Ramón Sosa-Ávalos Elsa Aguirre-Hernández Gilberto Gaxiola-Castro Ciencias de la Tierra California Current Climatic variations Integrated chlorophyll a Integrated primary production North Pacific Gyre Oscillation Between 1997 and 2016, the Investigaciones Mexicanas de la Cor riente de California (IMECOCAL, Mexican Investigations of the California Current) program conducted measurements of ch lorophyll a and phytoplankton production off Baja California. Here, we summarize the main results obtained during the survey period. Long-term means indicated that high productivity occurred along the coastal zone where upwelling occurs, and in a semi-permanent cyclonic g yre off Punta Eugenia. At the seasonal scale, the variability o f integrated primary production showed differences with respect to integrate d chlorophyll a variability. Integrated chlorophyll a exhibited maximum values during the coastal upwelling season in spring and summer, while minimum values occurred during the inflow of tropical-subtropi cal waters south of Punta Eugenia in autumn and winter. In contrast, the h ighest values of integrated primary production occurred in spri ng and summer to the north of Punta Eugenia, whereas to the south of this locati on, the highest values occurred in winter and autumn. This seas onal variability was associated with phytoplankton size and maximum photosynthetic r ates. At the interannual scale, low productivity was associated with increased stratification during the subarctic water intrusion events and the “Blob” and El Niño events in 2015–2016. Productivity time-series were in agreement with the seasonal variability of the north Pacific Gy re Oscillation index. Given that phytoplankton is the first lev el of the marine food web, this study contributes to the understanding of regional va riations in higher trophic levels at the seasonal and interannual scales. 2017 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48054149002 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.4 Vol.43