<?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>0120-548X</journal-id>
<journal-title><![CDATA[Acta Biológica Colombiana]]></journal-title>
<abbrev-journal-title><![CDATA[Acta biol.Colomb.]]></abbrev-journal-title>
<issn>0120-548X</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional de Colombia, Facultad de Ciencias, Departamento de Biología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-548X2021000200226</article-id>
<article-id pub-id-type="doi">10.15446/abc.v26n2.84142</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[EFECTO DEL pH EN LAS TASAS DE BIOACUMULACIÓN DE METALES PESADOS EN LA MACROALGA Bostrychia calliptera (Rhodomelaceae, Ceramiales)]]></article-title>
<article-title xml:lang="en"><![CDATA[Effect of pH on the bioacumulation rates of heavy metals in macroalgae Bostrychia calliptera (Rhodomelaceae, Ceramiales)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[RIOS MARIN]]></surname>
<given-names><![CDATA[Felipe]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[PEÑA SALAMANCA]]></surname>
<given-names><![CDATA[Enrique Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[BENÍTEZ BENÍTEZ]]></surname>
<given-names><![CDATA[Ricardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro de Diseño Tecnológico Industrial SENA  ]]></institution>
<addr-line><![CDATA[Santiago de Cali ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad del Valle Departamento de Biología Facultad de Ciencias]]></institution>
<addr-line><![CDATA[Santiago de Cali ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad del Cauca Departamento de Química ]]></institution>
<addr-line><![CDATA[Popayán ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2021</year>
</pub-date>
<volume>26</volume>
<numero>2</numero>
<fpage>226</fpage>
<lpage>234</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-548X2021000200226&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-548X2021000200226&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-548X2021000200226&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Uno de los factores que más influye en las características químicas de un metal en solución es el nivel de acidez. El pH, por lo tanto, afecta la reactividad del ion y por ende su interacción con los puntos de unión de la pared celular de la planta. Este estudio evaluó el efecto del pH en la capacidad de bioacumulación de metales pesados en el alga roja Bostrychia calliptera (Rhodophyta, Rhodomelaceae). Se sometieron talos del alga a diferentes concentraciones de mercurio (Hg) y Plomo (Pb), desde 0,1 hasta 10 mg/L para Hg y desde 0,1 hasta 15 mg/L para Pb, durante periodos exposición de 0, 12, 24 y 96 horas, bajo diferentes niveles de pH. Las concentraciones de metal acumulado se determinaron por espectrofotometría de absorción atómica. Las mayores tasas de acumulación se encontraron en el alga expuesta a pH 8 (tanto para Hg como para Pb), el cual es un nivel de pH muy cercano al medido en el área de muestreo. La concentración de metal en el alga se incrementó de manera lineal hasta las 48 h de exposición, tiempo en el que se evidenció una mayor eficiencia de acumulación durante el primer intervalo del periodo del bioensayo. El presente estudio permitió identificar el uso potencial del alga B. calliptera como especie bioindicadora de metales pesados en ambientes estuarinos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT One of the factors with a bigger influence on the chemical characteristics of metal in solution is the level of acidity. Solution pH affects the cell wall metal-binding sites and the metal ion chemistry in water. This study evaluated the effect of pH on the bioaccumulation capacity in the red algae B. calliptera (Rhodophyta, Rhodomelaceae) exposed to different pH ranges. Algae thalli were subjected to different concentrations ofmercury (Hg) and Lead (Pb), at concentrations from 0.1 to 10 mg/L for Hg and from 0.1 to 15 mg/L for Pb, respectively, during the following exposure times: 0, 12, 24 and 96 hours for each ion. Metal concentrations were determined by atomic absorption spectrophotometry according to standard APHA methods. The highest accumulation rates were found when the algae were exposed to pH 8 (for both Hg and Pb), which is a level very close to that measured in the study area. The metal concentration in the algae increased linearly until 48 hrs, a time where a greater accumulation efficiency was evident. The present study allowed to identify the potential use of the alga B. calliptera as a bioindicator species for heavy metals in estuarine environments.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[alga]]></kwd>
<kwd lng="es"><![CDATA[biomonitoreo]]></kwd>
<kwd lng="es"><![CDATA[bioensayos]]></kwd>
<kwd lng="es"><![CDATA[estuarios]]></kwd>
<kwd lng="es"><![CDATA[metales pesados]]></kwd>
<kwd lng="en"><![CDATA[algae]]></kwd>
<kwd lng="en"><![CDATA[biomonitoring bioassays]]></kwd>
<kwd lng="en"><![CDATA[estuaries]]></kwd>
<kwd lng="en"><![CDATA[heavy metals]]></kwd>
</kwd-group>
</article-meta>
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