<?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>0188-4999</journal-id>
<journal-title><![CDATA[Revista internacional de contaminación ambiental]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Int. Contam. Ambient]]></abbrev-journal-title>
<issn>0188-4999</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Ciencias de la Atmósfera y Cambio Climático]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-49992021000100136</article-id>
<article-id pub-id-type="doi">10.20937/rica.54083</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[TROPHIC STATUS OF A TROPICAL COASTAL LAGOON IN MARGARITA ISLAND, VENEZUELA]]></article-title>
<article-title xml:lang="es"><![CDATA[ESTADO TRÓFICO DE UNA LAGUNA COSTERA TROPICAL EN LA ISLA DE MARGARITA, VENEZUELA]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pereira-Ibarra]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Monroy]]></surname>
<given-names><![CDATA[Fabiola]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Oriente  ]]></institution>
<addr-line><![CDATA[Boca del Río ]]></addr-line>
<country>Venezuela</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<volume>37</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992021000100136&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992021000100136&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992021000100136&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Punta de Piedras Lagoon is a coastal lagoon located south of Margarita Island, in the Venezuelan Caribbean Sea. This lagoon has ecological and economic importance for the inhabitants of nearby communities. Currently, the urban and industrial development in its surroundings represents a potential source of pollutants, providing concentrations of nutrients that could affect the ecological balance of the area. The trophic status of Punta de Piedras Lagoon was evaluated using various trophic indices. The concentrations of chlorophyll-a and nutrients (ammonium, nitrites, nitrates, and orthophosphates) were estimated in 10 stations with a monthly frequency from February 2005 to January 2006. These data were used to estimate the trophic condition based on the Karydis and TRIX trophic indices, and by comparison with Organization for Economic Co-operation and Development reference values. It was found that Punta de Piedras lagoon presented mesotrophic conditions in most of the water body having considerable differences between indices. The values of the closest station to Paseo Esther Gil corresponded to eutrophic waters. However, the circulation and residence time of water allow an exchange with the adjacent sea, which prevents the eutrophication process in the lagoon.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La Laguna de Punta de Piedras es una laguna costera situada al sur de la isla de Margarita, en el mar Caribe venezolano, que tiene importancia ecológica y económica para la zona. En la actualidad el desarrollo urbano e industrial en sus alrededores son fuentes potenciales de contaminantes y aportan concentraciones de nutrientes que pudieran afectar el equilibrio ecológico de la zona. Se realizó la evaluación del estado trófico de la Laguna de Punta de Piedras usando varios índices tróficos. Se estimaron las concentraciones de clorofila a y los nutrientes amonio, nitritos, nitratos y ortofosfatos en 10 estaciones, con una frecuencia mensual de febrero 2005 a enero 2006. Estos datos fueron empleados para estimar la condición trófica a partir de los índices de eutrofización de Karydis y TRIX y por comparación con valores referenciales de la Organización para la Cooperación y el Desarrollo Económicos. Se obtuvo que la laguna tiene una condición mesotrófica en la mayor parte del cuerpo de agua con diferencias apreciables entre los índices utilizados. La estación más cercana a Paseo Esther Gil presentó valores que corresponden a aguas eutróficas. Sin embargo, la circulación y el tiempo de residencia del agua facilitan un intercambio con el mar adyacente, lo cual evita que ocurra un proceso de eutrofización en la laguna.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[eutrophication]]></kwd>
<kwd lng="en"><![CDATA[Caribbean Sea]]></kwd>
<kwd lng="en"><![CDATA[nutrients]]></kwd>
<kwd lng="en"><![CDATA[Punta de Piedras]]></kwd>
<kwd lng="en"><![CDATA[trophic index]]></kwd>
<kwd lng="es"><![CDATA[eutrofización]]></kwd>
<kwd lng="es"><![CDATA[índice trófico]]></kwd>
<kwd lng="es"><![CDATA[mar Caribe]]></kwd>
<kwd lng="es"><![CDATA[nutrientes]]></kwd>
<kwd lng="es"><![CDATA[Punta de Piedras]]></kwd>
</kwd-group>
</article-meta>
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