<?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>S0188-88972021000200179</article-id>
<article-id pub-id-type="doi">10.24275/uam/izt/dcbs/hidro/2021v31n2/sobrino</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Textura y contenido de materia orgánica de los sedimentos superficiales del Lago de Metztitlán, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Texture and organic matter content of surface sediments from Metztitlan Lake, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-Rojas]]></surname>
<given-names><![CDATA[Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Torres-Orozco B]]></surname>
<given-names><![CDATA[Roberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sobrino-Figueroa]]></surname>
<given-names><![CDATA[Alma S.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Loyola-Colín]]></surname>
<given-names><![CDATA[Giovana J.]]></given-names>
</name>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma Metropolitana Departamento de Hidrobiología Laboratorio de Limnología y Geología]]></institution>
<addr-line><![CDATA[Iztapalapa Ciudad de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma Metropolitana Departamento de Hidrobiología Laboratorio Alejandro Villalobos]]></institution>
<addr-line><![CDATA[Iztapalapa Ciudad de México]]></addr-line>
<country>Mexico</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>31</volume>
<numero>2</numero>
<fpage>179</fpage>
<lpage>191</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-88972021000200179&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-88972021000200179&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-88972021000200179&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Antecedentes:  La textura y el contenido de materia orgánica de los sedimentos superficiales de los ecosistemas acuáticos ofrecen información relevante acerca de la naturaleza de los procesos sedimentarios que allí ocurren, además de que ejercen una influencia notable en el aporte de nutrientes en la columna de agua y en la composición y distribución de la biota béntica.  Objetivo:  Debido a que son escasos los estudios sobre las características sedimentarias, en este trabajo se realizó una evaluación de la composición textural y el contenido de materia orgánica de los sedimentos superficiales del Lago de Metztitlán.  Métodos:  Se colectaron 35 muestras de sedimento en las temporadas de secas y lluvias durante 2 años. El análisis granulométrico se realizó mediante la técnica de tamizado en húmedo y pipeteo. El contenido de materia orgánica (MO) se determinó mediante el método de pérdida de peso por ignición a 550°C.  Resultados:  El análisis textural de los sedimentos permitió reconocer un amplio predominio de arcilla limosa en la mayor parte del lago, además de dos grupos menores: limos arcillosos, a lo largo y al frente de la desembocadura del afluente principal, y arcillas francas, en las áreas de menor hidrodinámica. La proporción de materia orgánica en el sedimento varío entre 7 y 12%. Los datos obtenidos no mostraron diferencias significativas entre las épocas del año analizadas.  Conclusiones:  El predominio de sedimentos finos con contenido de materia orgánica, podría tener un papel preponderante en la estructura trófica del lago, al hacer de los detritos una importante vía para el flujo de la energía en el ecosistema.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Background:  Texture and organic matter content of the surface sediments of aquatic ecosystems provide important information about the nature of the sedimentary processes that occur there also to exerting a notable influence on the supply of nutrients in the water column and on the composition and distribution of benthic biota.  Goals:  Due to the lack of antecedents, in this study an evaluation of the textural characteristics and organic matter content of the surface sediments of Lake Metztitlán was carried out.  Methods:  Sediment samples (n= 35) were collected in the dry and rainy season for 2 years. The granulometric analysis was carried out using sieving and pipetting techniques. The content of organic matter (OM) was determined by the ignition technique at 550 °C.  Results:  The textural analysis of sediments allowed to recognize a wide predominance of silty clay in the most of the lake bottom, in addition to two smaller groups: clayey silt, along the front of the mouth of the lake&#8217;s main tributary, and clays, in the areas of lower hydrodynamic. Furthermore, the proportion of organic matter in the sedimenst ranged between 7 and 12%. The data obtained did not show significant differences between the seasons of the year analyzed.  Conclusions:  The predominance of fine sediments with content of organic matter, probably have a major role in the trophic structure of the lake being the detritus an important path to the energy flow in the ecosystem.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Lago de Metztitlán]]></kwd>
<kwd lng="es"><![CDATA[sedimentos]]></kwd>
<kwd lng="es"><![CDATA[textura]]></kwd>
<kwd lng="es"><![CDATA[materia orgánica]]></kwd>
<kwd lng="en"><![CDATA[Lake Metztitlán]]></kwd>
<kwd lng="en"><![CDATA[Mexico]]></kwd>
<kwd lng="en"><![CDATA[sediments]]></kwd>
<kwd lng="en"><![CDATA[texture]]></kwd>
<kwd lng="en"><![CDATA[organic matter]]></kwd>
</kwd-group>
</article-meta>
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