Response of primary producers to the hydrographic variability in the southern region of the California Current System
The response of primary producers to seasonal and interannual variabilities in the hydrographic conditions observed between 1997 and 2012 is analyzed for the southern portion of the California Current System (CCS). The analysis uses the optimum rate of primary productivity (PP) normalized by units...
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| Format: | Article |
| Language: | English |
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Universidad Autónoma de Baja California
2017-06-01
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| Series: | Ciencias Marinas |
| Online Access: | https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2752 |
| _version_ | 1797279576475303936 |
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| author | Jushiro Cepeda-Morales Reginaldo Durazo Eduardo Millán-Núñez Martín De la Cruz-Orozco Ramon Sosa-Ávalos Teresa Leticia Espinoza-Carreón Luis Soto-Mardones Gilberto Gaxiola-Castro |
| author_facet | Jushiro Cepeda-Morales Reginaldo Durazo Eduardo Millán-Núñez Martín De la Cruz-Orozco Ramon Sosa-Ávalos Teresa Leticia Espinoza-Carreón Luis Soto-Mardones Gilberto Gaxiola-Castro |
| author_sort | Jushiro Cepeda-Morales |
| collection | DOAJ |
| description |
The response of primary producers to seasonal and interannual variabilities in the hydrographic conditions observed between 1997 and 2012 is analyzed for the southern portion of the California Current System (CCS). The analysis uses the optimum rate of primary productivity (PP) normalized by units of chlorophyll (Chla) in the water column (PBopt) and Chla concentration. In situ PP estimations using the 14C method were obtained as part of the seasonal cruises conducted by the Investigaciones Mexicanas de la Corriente de California program. Supplementary data included sea surface temperature (SST) as measured by the AVHRR sensor from 1985–2009. We found the mean value of PBopt to be at 5.1 ± 3.3 mg C·(mg Chla)–1·h–1, with maximum ranges of 0.5 and 17.5 mg C·(mg Chla)–1·h–1. The relationship between PBopt and SST suggested a phytoplankton community change at around 19 ºC, which characterized the transitional nature of the southern portion of the CCS. SST data suggested, on the one hand, that on average the 19 ºC isotherm is located in the vicinity of Punta Eugenia and, on the other, that its spatial variability defined the alternating cool–warm conditions. At the seasonal scale, this isotherm showed a marked latitudinal displacement (from 24ºN to 32ºN), which was observed to be even out of this range during interannual events associated with El Niño/La Niña. Under both cool-warm hydrographic conditions, the phytoplanktonic community showed large PBopt rates (~6 mg C·(mg Chla)–1·h–1). At the interannual scale, changes were associated to changes in the abundance and composition of nano-microphytoplankton. Additionally, data suggested that high PP rates during warm periods could be attributed to an enhanced picoplankton contribution.
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| first_indexed | 2024-03-07T16:27:08Z |
| format | Article |
| id | doaj.art-f1c81caf09434fc49eb20eb112ffd7c3 |
| institution | Directory Open Access Journal |
| issn | 0185-3880 2395-9053 |
| language | English |
| last_indexed | 2024-03-07T16:27:08Z |
| publishDate | 2017-06-01 |
| publisher | Universidad Autónoma de Baja California |
| record_format | Article |
| series | Ciencias Marinas |
| spelling | doaj.art-f1c81caf09434fc49eb20eb112ffd7c32024-03-03T17:44:35ZengUniversidad Autónoma de Baja CaliforniaCiencias Marinas0185-38802395-90532017-06-0143210.7773/cm.v43i2.2752Response of primary producers to the hydrographic variability in the southern region of the California Current SystemJushiro Cepeda-Morales0Reginaldo Durazo1Eduardo Millán-Núñez2Martín De la Cruz-Orozco3Ramon Sosa-Ávalos4Teresa Leticia Espinoza-Carreón5Luis Soto-Mardones6Gilberto Gaxiola-CastroUniversidad Autónoma de NayaritUniversidad Autónoma de Baja CaliforniaCentro de Investigación Científica y Educación Superior de EnsenadaCentro de Investigación Científica y Educación Superior de EnsenadaUniversidad de ColimaCentro Interdisciplinario de Investigación para el Desarrollo Integral RegionalUniversidad del Bío-Bío The response of primary producers to seasonal and interannual variabilities in the hydrographic conditions observed between 1997 and 2012 is analyzed for the southern portion of the California Current System (CCS). The analysis uses the optimum rate of primary productivity (PP) normalized by units of chlorophyll (Chla) in the water column (PBopt) and Chla concentration. In situ PP estimations using the 14C method were obtained as part of the seasonal cruises conducted by the Investigaciones Mexicanas de la Corriente de California program. Supplementary data included sea surface temperature (SST) as measured by the AVHRR sensor from 1985–2009. We found the mean value of PBopt to be at 5.1 ± 3.3 mg C·(mg Chla)–1·h–1, with maximum ranges of 0.5 and 17.5 mg C·(mg Chla)–1·h–1. The relationship between PBopt and SST suggested a phytoplankton community change at around 19 ºC, which characterized the transitional nature of the southern portion of the CCS. SST data suggested, on the one hand, that on average the 19 ºC isotherm is located in the vicinity of Punta Eugenia and, on the other, that its spatial variability defined the alternating cool–warm conditions. At the seasonal scale, this isotherm showed a marked latitudinal displacement (from 24ºN to 32ºN), which was observed to be even out of this range during interannual events associated with El Niño/La Niña. Under both cool-warm hydrographic conditions, the phytoplanktonic community showed large PBopt rates (~6 mg C·(mg Chla)–1·h–1). At the interannual scale, changes were associated to changes in the abundance and composition of nano-microphytoplankton. Additionally, data suggested that high PP rates during warm periods could be attributed to an enhanced picoplankton contribution. https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2752 |
| spellingShingle | Jushiro Cepeda-Morales Reginaldo Durazo Eduardo Millán-Núñez Martín De la Cruz-Orozco Ramon Sosa-Ávalos Teresa Leticia Espinoza-Carreón Luis Soto-Mardones Gilberto Gaxiola-Castro Response of primary producers to the hydrographic variability in the southern region of the California Current System Ciencias Marinas |
| title | Response of primary producers to the hydrographic variability in the southern region of the California Current System |
| title_full | Response of primary producers to the hydrographic variability in the southern region of the California Current System |
| title_fullStr | Response of primary producers to the hydrographic variability in the southern region of the California Current System |
| title_full_unstemmed | Response of primary producers to the hydrographic variability in the southern region of the California Current System |
| title_short | Response of primary producers to the hydrographic variability in the southern region of the California Current System |
| title_sort | response of primary producers to the hydrographic variability in the southern region of the california current system |
| url | https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2752 |
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