<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0185-3880</journal-id>
<journal-title><![CDATA[Ciencias marinas]]></journal-title>
<abbrev-journal-title><![CDATA[Cienc. mar]]></abbrev-journal-title>
<issn>0185-3880</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma de Baja California, Instituto de Investigaciones Oceanológicas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0185-38802017000200123</article-id>
<article-id pub-id-type="doi">10.7773/cm.v43i2.2752</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Response of primary producers to the hydrographic variability in the southern region of the California Current System]]></article-title>
<article-title xml:lang="es"><![CDATA[Respuesta de los productores primarios a la variabilidad hidrográfica en la región sur de la corriente de California]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cepeda-Morales]]></surname>
<given-names><![CDATA[Jushiro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Durazo]]></surname>
<given-names><![CDATA[Reginaldo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Millán-Núñez]]></surname>
<given-names><![CDATA[Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cruz-Orozco]]></surname>
<given-names><![CDATA[Martín De la]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sosa-Ávalos]]></surname>
<given-names><![CDATA[Ramón]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Espinosa-Carreón]]></surname>
<given-names><![CDATA[T Leticia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Soto-Mardones]]></surname>
<given-names><![CDATA[Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gaxiola-Castro]]></surname>
<given-names><![CDATA[Gilberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Nayarit CENIT2 Laboratorio de Percepción Remota Satelital de Ecosistemas costeros y Oceánicos]]></institution>
<addr-line><![CDATA[ Nayarit]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma de Baja California Facultad de Ciencias Marinas ]]></institution>
<addr-line><![CDATA[Ensenada Baja California]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Centro de Investigación Científica y de Educación Superior de Ensenada  ]]></institution>
<addr-line><![CDATA[Ensenada Baja California]]></addr-line>
<country>México</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad de Colima Centro Universitario de Investigaciones Oceanológicas ]]></institution>
<addr-line><![CDATA[ Manzanillo]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Instituto Politécnico Nacional Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional ]]></institution>
<addr-line><![CDATA[Guasave Sinaloa]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,Universidad del Bío-Bío Facultad de Ciencias ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Chile</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2017</year>
</pub-date>
<volume>43</volume>
<numero>2</numero>
<fpage>123</fpage>
<lpage>135</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-38802017000200123&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-38802017000200123&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-38802017000200123&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract 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 (    P  o p t  B ) 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    P  o p t  B 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    P  o p t  B 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    P  o p t  Brates (~6 mg C (mg Chla)-1 h-1). At the interannual scale,    P  o p t  B 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.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se analizó la respuesta de los productores primarios a la variabilidad estacional e interanual de las condiciones hidrográficas en la región sur del Sistema de la Corriente de California (SCC) entre 1997 y 2012. El análisis se basa en la tasa óptima de productividad primaria (PP) normalizada por unidad de clorofila (Chla) en la columna de agua (    P  o p t  B) y en la concentración de Chla. Como parte del monitoreo que realiza el programa de Investigaciones Mexicanas de la Corriente de California, se obtuvieron para cada estación del año datos de PP in situ con la técnica de 14C. La información se complementó con datos de la temperatura superficial del mar (TSM) medida por el sensor AVHRR de 1985 a 2009. El análisis de los datos de TSM demostró que, en el promedio de largo periodo, la isoterma de 19 ºC se ubicó en las inmediaciones de punta Eugenia y que su variabilidad espacial permite seguir la alternancia del cambio entre las condiciones frías y cálidas. En la escala estacional, esta isoterma presentó un marcado desplazamiento latitudinal (de 24ºN a 32ºN), y se extiendió aún más durante eventos interanuales asociados a El Niño/La Niña. El valor promedio del    P  o p t  B fue de 5.1 ± 3.3 mg C (mg Chla)-1 h-1 y varió de 0.5 a 17.5 mg C (mg Chla)-1 h-1. La relación entre el    P  o p t  B y la TSM sugiere un cambio en la comunidad del fitoplancton a los 19 ºC, lo que se consideró como una respuesta al carácter transicional del SCC. La comunidad fitoplanctónica mantuvo altas tasas promedio de    P  o p t  B (~6 mg C (mg Chla)-1 h-1) en ambas condiciones hidrográficas (frío/cálido). Las variaciones en la escala estacional e interanual del    P  o p t  B estuvieron asociados a cambios en la composición y abundancia del nano-microfitoplancton. Los datos sugieren que las altas tasas PP en periodos cálidos pueden atribuirse a la contribución del picoplancton.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[primary production]]></kwd>
<kwd lng="en"><![CDATA[chlorophyll]]></kwd>
<kwd lng="en"><![CDATA[phytoplankton community]]></kwd>
<kwd lng="en"><![CDATA[seasonal variability]]></kwd>
<kwd lng="en"><![CDATA[California Current]]></kwd>
<kwd lng="es"><![CDATA[productividad primaria]]></kwd>
<kwd lng="es"><![CDATA[clorofila]]></kwd>
<kwd lng="es"><![CDATA[comunidad del fitoplancton]]></kwd>
<kwd lng="es"><![CDATA[variaciones estacionales]]></kwd>
<kwd lng="es"><![CDATA[corriente de California]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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<page-range>221-31</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
