<?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>0188-8897</journal-id>
<journal-title><![CDATA[Hidrobiológica]]></journal-title>
<abbrev-journal-title><![CDATA[Hidrobiológica]]></abbrev-journal-title>
<issn>0188-8897</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma Metropolitana, División de Ciencias Biológicas y de la Salud]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-88972020000300189</article-id>
<article-id pub-id-type="doi">10.24275/uam/izt/dcbs/hidro/2020v30n3/vargas</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Algas perifíticas en cuatro fuentes hídricas con diferente temporalidad post aprovechamiento minero a cielo abierto en Jigualito, Condoto, Chocó, Colombia]]></article-title>
<article-title xml:lang="en"><![CDATA[Periphytic algae in four water source with different temporality post use to open pit mining in Jigualito, Condoto, Chocó, Colombia]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vargas-Porras]]></surname>
<given-names><![CDATA[Lady]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez-Moreno]]></surname>
<given-names><![CDATA[Giovanny]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Atilano]]></surname>
<given-names><![CDATA[Esnedy]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rangel-Ch]]></surname>
<given-names><![CDATA[J. Orlando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto de Investigaciones Ambientales del Pacífico  ]]></institution>
<addr-line><![CDATA[Quibdó ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto de Investigaciones Ambientales del Pacífico  ]]></institution>
<addr-line><![CDATA[Quibdó ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Antioquia Facultad de Ingeniería Escuela Ambiental]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Nacional de Colombia Instituto de Ciencias Naturales ]]></institution>
<addr-line><![CDATA[ Bogotá D. C.]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2020</year>
</pub-date>
<volume>30</volume>
<numero>3</numero>
<fpage>189</fpage>
<lpage>202</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-88972020000300189&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-88972020000300189&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-88972020000300189&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Antecedentes: La minería ilegal a cielo abierto es una de las actividades que más afecta los ecosistemas hídricos en Colombia y específicamente en Chocó (Jigualito, Condoto), generando cambios fisicoquímicos y biológicos aún desconocidos.  Objetivos:  Evaluar el comportamiento fisicoquímico del disturbio y la respuesta de la fracción perifítica en fuentes hídricas afectadas por minería.  Métodos: Se realizaron mediciones in situ de variables fisicoquímicas y determinación de riqueza, diversidad y densidad de algas perifíticas en tres fuentes hídricas con diferente temporalidad de cese minero (minería actual, 5-10 y 30 años) y una fuente de referencia.  Resultados:  La minería tiene un efecto marcado en la concentración de nutrientes, material sólido suspendido y la temperatura, presentando un patrón de reducción desde estaciones con intervención actual hasta con 30 años de abandono. Se registraron 120 especies, 80 géneros, 51 familias, 34 órdenes y 13 divisiones, predominando Frustulia romboides, Eunotia aff.minor, Ulothrix sp.y Frustulia sp1. La minería reduce más del 50% de la riqueza (35) y la diversidad (1.5) de algas perifíticas con relación a estaciones sin intervención (72 y 3.3, respectivamente) y aunque durante los primeros 5 a 10 años de abandono, se inicia un proceso de restablecimiento (riqueza 49, diversidad 2.0), los efectos del disturbio se perciben aún a los 30 años de cese minero, donde a pesar del aumento en la riqueza (78), la diversidad no alcanzó el nivel inicial (2.7).  Conclusiones:  La recuperación post aprovechamiento minero es de largo alcance, dada la ruptura en la estabilidad de los procesos fisicoquímicos y biológicos que produce la actividad en los sistemas hídricos naturales.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Background:  Illegal open pit mining is one of the activities that most affects water ecosystems in Colombia and the Chocó (Jigualito, Condoto), generating physical and chemical changes that are still unknown.  Goals:  To evaluate the physicochemical behavior of the disturbance and the response of the peripheral fraction in water sources affected by mining.  Methods: In situ measurements of physicochemical variables and determination of the richness, diversity and density of perifitic algae were made in three water sources with different temporality of mining cessation (current mining, 5-10 and 30 years) and a reference source.  Results:  Mining has a marked effect on the concentration of nutrients, suspended solid material and temperature, presenting a reduction pattern from current intervention scenarios to 30 years of abandonment. There were registered 120 species, 80 genera, 51 families, 34 orders and 13 divisions, predominating Frustulia romboides, Eunotia aff. minor, Ulothrix sp. and Frustulia sp1. Mining reduces more than 50% of the wealth (35) and diversity (1.5) of periphytic algae in relation to non-intervention scenarios (72, and 3.3, respectively) and although during the first 5 to 10 years of abandonment, a process of restoration (wealth 49, diversity 2.0), the effects of the disturbance are perceived after 30 years of mining cessation, where despite the increase in wealth (78), diversity does not reach the initial level (2.7).  Conclusions: The recovery after mining exploitation is far-reaching, given the break in the stability of physical and chemical processes that produces activity in natural water systems.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[diatomeas perifíticas]]></kwd>
<kwd lng="es"><![CDATA[disturbio minero]]></kwd>
<kwd lng="es"><![CDATA[diversidad de algas]]></kwd>
<kwd lng="es"><![CDATA[minería de oro]]></kwd>
<kwd lng="es"><![CDATA[recuperación hídrica]]></kwd>
<kwd lng="en"><![CDATA[diatomaceous periphyton]]></kwd>
<kwd lng="en"><![CDATA[gold mining]]></kwd>
<kwd lng="en"><![CDATA[mining disturbance]]></kwd>
<kwd lng="en"><![CDATA[river restoration]]></kwd>
<kwd lng="en"><![CDATA[diversity in algae species]]></kwd>
</kwd-group>
</article-meta>
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