<?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>0034-7744</journal-id>
<journal-title><![CDATA[Revista de Biología Tropical]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. biol. trop]]></abbrev-journal-title>
<issn>0034-7744</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0034-77442022000100250</article-id>
<article-id pub-id-type="doi">10.15517/rev.biol.trop..v70i1.47625</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Distribución espacio-temporal de cianobacterias planctónicas y factores ambientales asociados a sus proliferaciones en el embalse Cerrón Grande, El Salvador]]></article-title>
<article-title xml:lang="en"><![CDATA[Spatio-temporal distribution of planktonic cyanobacteria and environmental factors associated with their proliferation in the Cerrón Grande reservoir, El Salvador]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ortez]]></surname>
<given-names><![CDATA[Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rovira]]></surname>
<given-names><![CDATA[María-Dolores]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moran]]></surname>
<given-names><![CDATA[Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Centroamericana José Simeón Cañas Facultad de Ingeniería y Arquitectura Departamento de Ingeniería de Procesos y Ciencias Ambientales]]></institution>
<addr-line><![CDATA[ La Libertad]]></addr-line>
<country>El Salvador</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<volume>70</volume>
<numero>1</numero>
<fpage>250</fpage>
<lpage>262</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0034-77442022000100250&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0034-77442022000100250&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0034-77442022000100250&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción:  El embalse Cerrón Grande de 135 km2 es el humedal más grande de El Salvador, reconocido como &#8220;Humedal de Importancia Internacional&#8221; por la Convención Ramsar. Además, es uno de los ecosistemas más contaminados a nivel nacional, enfrentando serios problemas, entre ellos, las proliferaciones de cianobacterias.  Objetivo:  Evaluar las relaciones entre los factores ambientales y la distribución espacial y temporal de las cianobacterias en el embalse a lo largo de un año hidrológico.  Métodos:  Extrajimos agua con cianobacterias de seis sitios fijos, desde octubre 2018 hasta septiembre 2019.  Resultados:  Identificamos 16 géneros, el más abundante Microcystis sp. Además, Dolichospermum sp.; Microcistis sp. alcanzaron 1.5 x 106 células/ml en junio 2019, principalmente en el sector noroeste, que es poco profundo y cercano a las zonas de confluencia de afluentes altamente contaminados que llegan al embalse. El sector sureste más profundo tenía bajas concentraciones de estos organismos. Los factores ambientales mayormente relacionados con dicho comportamiento fueron: fósforo, la conductividad eléctrica y el valor de Secchi, como se esperaba de un cuerpo eutrófico.  Conclusiones:  La variación en la concentración celular de cianobacterias en este embalse está altamente influenciada por la lluvia, la mezcla de agua y el contenido de nutrientes.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction:  The 135 km2 Cerrón Grande reservoir is the largest wetland in El Salvador, recognized as &#8220;Wetland of International Importance&#8221; by the Ramsar Convention. It is also one of the most polluted ecosystems nationwide, facing serious problems, among them, a proliferation of cyanobacteria.  Objective:  To assess the relationships among environmental factors and the spatial and temporary distribution of cyanobacteria in the reservoir throughout a hydrological year.  Methods:  We extracted water with cyanobacteria from six fixed sites, from October 2018 through September 2019.  Results:  We identified 16 genera, the most abundant Microcystis sp. And Dolichospermum sp.; Microcystis sp. reached 1.5 x 106 cells/ml in June 2019, mainly in the north-west sector, which is shallow and close to the confluence zones where highly polluted tributaries reach the reservoir. The deeper south-east sector had low concentrations of these organisms. The environmental factors mostly related to this behavior were: phosphorus, electrical conductivity and Secchi value, as expected from a eutrophic body.  Conclusions:  Variation in the cellular concentration of cyanobacteria in this reservoir is highly influenced by rain, water mixing and nutrient content.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[cyanobacteria]]></kwd>
<kwd lng="en"><![CDATA[tropical reservoir]]></kwd>
<kwd lng="en"><![CDATA[nutrients]]></kwd>
<kwd lng="en"><![CDATA[temporality]]></kwd>
<kwd lng="en"><![CDATA[spatiality.]]></kwd>
<kwd lng="es"><![CDATA[cianobacteria]]></kwd>
<kwd lng="es"><![CDATA[embalse tropical]]></kwd>
<kwd lng="es"><![CDATA[nutrientes]]></kwd>
<kwd lng="es"><![CDATA[temporalidad]]></kwd>
<kwd lng="es"><![CDATA[espacialidad.]]></kwd>
</kwd-group>
</article-meta>
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