<?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>2007-2422</journal-id>
<journal-title><![CDATA[Tecnología y ciencias del agua]]></journal-title>
<abbrev-journal-title><![CDATA[Tecnol. cienc. agua]]></abbrev-journal-title>
<issn>2007-2422</issn>
<publisher>
<publisher-name><![CDATA[Instituto Mexicano de Tecnología del Agua, Coordinación de Comunicación, Participación e Información]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-24222021000300082</article-id>
<article-id pub-id-type="doi">10.24850/j-tyca-2021-03-03</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Impact of chemical and microbiological water quality on bacterial community assemblage of San Juan River (Sierra del Rosario, Biosphere Reserve, Cuba)]]></article-title>
<article-title xml:lang="es"><![CDATA[Impacto de la calidad química y microbiológica del agua sobre la estructura de la comunidad bacteriana del río San Juan (Sierra del Rosario, Reserva de la Biosfera, Cuba)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Larrea-Murrell]]></surname>
<given-names><![CDATA[Jeny A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bacchetti-De-Gregoris]]></surname>
<given-names><![CDATA[Tristano]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Heydrich-Pérez]]></surname>
<given-names><![CDATA[Mayra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lugo-Moya]]></surname>
<given-names><![CDATA[Daysi]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Estéve-Núñez]]></surname>
<given-names><![CDATA[Abraham]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Boltes-Espínola]]></surname>
<given-names><![CDATA[Karina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojas-Badía]]></surname>
<given-names><![CDATA[Marcia M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de La Habana Facultad de Biología Departamento de Microbiología y Virología]]></institution>
<addr-line><![CDATA[La Habana ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Alcalá Instituto Madrileño de Estudios Avanzados Agua ]]></institution>
<addr-line><![CDATA[Alcalá de Henares Madrid]]></addr-line>
<country>Spain</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de La Habana Facultad de Biología Laboratorio de Ecología Microbiana, Departamento de Microbiología y Virología]]></institution>
<addr-line><![CDATA[La Habana ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad de La Habana Facultad de Biología Laboratorio de Ecología Microbiana, Departamento de Microbiología y Virología]]></institution>
<addr-line><![CDATA[La Habana ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad de Alcalá Instituto Madrileño de Estudios Avanzados Agua ]]></institution>
<addr-line><![CDATA[Alcalá de Henares Madrid]]></addr-line>
<country>Spain</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,Parque Científico Tecnológico de la Universidad de Alcalá Instituto Madrileño de Estudios Avanzados Agua ]]></institution>
<addr-line><![CDATA[Alcalá de Henares Madrid]]></addr-line>
<country>Spain</country>
</aff>
<aff id="Af7">
<institution><![CDATA[,Universidad de La Habana Departamento de Microbiología y Virología Laboratorio de Ecología Microbiana]]></institution>
<addr-line><![CDATA[La Habana ]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2021</year>
</pub-date>
<volume>12</volume>
<numero>3</numero>
<fpage>82</fpage>
<lpage>123</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-24222021000300082&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-24222021000300082&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-24222021000300082&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The objective of the present study was to analyze the influence of different physicochemical and microbiological indicators on bacterial assemblages in a freshwater ecosystem located in a Biosphere Reserve. The bacterioplankton communities composition was determined by denaturing gradient gel electrophoresis (DGGE) of 16S rDNA during three sampling campaigns in three sampling stations of San Juan River. Multivariate statistical analyses of gel patterns, in relation to chemical, biological and physical parameters were performed. The analyses showed a seasonal variation of bacterial community at the less polluted stations. The correspondence canonical analysis showed that total dissolved solids (TDS), E. coli concentration and dissolved oxygen were significantly influencing the DGGE profiles at San Juan River, indicating that at least two of the three sampling stations analyzed possessed good water quality. With the combination of environmental variables and the DGGE molecular data it could be appreciated the influence of chemical and microbial contamination on the bacterial community of San Juan River. At the less polluted stations low concentrations of TDS and bacterial indicators of fecal contamination were related with bacterial diversity. The present investigation constitutes the first culture-independent analysis of freshwater bacterial communities in a Biosphere Reserve of the Caribbean islands.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo del presente estudio fue analizar la influencia de diferentes indicadores fisicoquímicos y microbiológicos de estructuras de la comunidad bacteriana en un ecosistema de agua dulce ubicado en la Reserva de la Biosfera Sierra del Rosario. La composición de las comunidades de bacterioplancton se determinó por electroforesis en gradiente desnaturalizante (DGGE) del 16S rDNA durante tres campañas en tres estaciones de muestreo en el río San Juan. Se realizaron análisis estadísticos multivariados de los patrones de la electroforesis en relación con parámetros químicos, biológicos y físicos. Los análisis mostraron la variación estacional de la comunidad bacteriana en las estaciones de muestreo menos contaminadas. Además, los sólidos disueltos totales (TDS), la concentración de E. coli y el oxígeno disuelto influyeron significativamente en los perfiles de DGGE en el río San Juan, lo que indica que al menos dos de las tres estaciones de muestreo analizadas tuvieron una buena calidad del agua. Con la combinación de variables ambientales y la DGGE es posible analizar la influencia de la contaminación química y microbiana en la comunidad bacteriana del río San Juan. En los sitios menos contaminados, las bajas concentraciones de TDS y los indicadores bacterianos de contaminación se relacionaron con la diversidad bacteriana. La presente investigación constituye el primer análisis independiente de cultivo de las comunidades bacterianas de ecosistemas dulceacuícolas en una reserva de la biosfera en las islas del Caribe.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Denaturing gradient gel electrophoresis (DGGE)]]></kwd>
<kwd lng="en"><![CDATA[freshwater ecosystem]]></kwd>
<kwd lng="en"><![CDATA[tropical country]]></kwd>
<kwd lng="en"><![CDATA[multivariate analysis]]></kwd>
<kwd lng="en"><![CDATA[Biosphere Reserve]]></kwd>
<kwd lng="es"><![CDATA[electroforesis en gel de gradiente desnaturalizante (DGGE)]]></kwd>
<kwd lng="es"><![CDATA[ecosistema de agua dulce]]></kwd>
<kwd lng="es"><![CDATA[país tropical]]></kwd>
<kwd lng="es"><![CDATA[análisis multivariado]]></kwd>
<kwd lng="es"><![CDATA[reserva de la biosfera]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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