<?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>1870-3453</journal-id>
<journal-title><![CDATA[Revista mexicana de biodiversidad]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Mex. Biodiv.]]></abbrev-journal-title>
<issn>1870-3453</issn>
<publisher>
<publisher-name><![CDATA[Instituto de Biología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-34532022000100329</article-id>
<article-id pub-id-type="doi">10.22201/ib.20078706e.2022.93.4168</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Testate amoebae assemblages from two tropical high-mountain lakes in central Mexico during the last ~60 years]]></article-title>
<article-title xml:lang="es"><![CDATA[Caracterización de las comunidades de amebas testadas de dos lagos tropicales de alta montaña en el centro de México durante los últimos ~60 años]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Caballero]]></surname>
<given-names><![CDATA[Margarita]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sigala]]></surname>
<given-names><![CDATA[Itzel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moreno]]></surname>
<given-names><![CDATA[Joanna]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vega-Flores]]></surname>
<given-names><![CDATA[Mireya]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Oseguera]]></surname>
<given-names><![CDATA[Luis A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ruiz-Fernández]]></surname>
<given-names><![CDATA[Ana Carolina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alcocer]]></surname>
<given-names><![CDATA[Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Geofísica ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Ciencias ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Estudios Superiores Iztacala ]]></institution>
<addr-line><![CDATA[ Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Ciencias del Mar y Limnología ]]></institution>
<addr-line><![CDATA[Mazatlán Sinaloa]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2022</year>
</pub-date>
<volume>93</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-34532022000100329&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-34532022000100329&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-34532022000100329&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Testate amoebae are bioindicators sensitive to environmental change, which show good preservation in sediments of low pH environments, such as high mountain lakes (LAM). The presence and diversity of testate amoebae were documented in surface sediments and sediment cores, dated with 210Pb, from the only 2 LAMs in Mexico (El Sol and La Luna), which have shown signs of recent human-induced changes. A total of 18 taxa were recorded and the main species observed in both lakes were Difflugia glans &#8220;glans&#8221; and D. globulosa. Specific richness and Shannon&#8217;s diversity index were higher in Lake El Sol than in the smaller, acidic and ultraoligotrophic Lake La Luna. The sediment cores recorded changes, during the last 20 to 25 years, in the composition of the testate amoebae communities (El Sol) and in their dominance (La Luna), as well as increased accumulation rate and concentrations of iron and organic carbon. These are signs of anthropogenic impact on the lakes, which should alert us to improve protection measures for these unique ecosystems, not only at the local (crater) level, but also with a more regional perspective.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Las amebas testadas son bioindicadores sensibles al cambio ambiental que presentan buena preservación en sedimentos de ambientes con pH bajo, tales como los lagos de alta montaña (LAM). Se documentaron la presencia y diversidad de amebas testadas en sedimentos superficiales y núcleos sedimentarios datados con 210Pb, de los únicos 2 LAM en México (El Sol y La Luna), que han presentado signos de cambios antrópicos recientes. Se registraron 18 taxones en total y las principales especies observadas en ambos lagos fueron Difflugia glans &#8220;glans&#8221; y D. globulosa. La riqueza específica y el índice de diversidad de Shannon fueron mayores en el lago El Sol que en el más pequeño, ácido y ultraoligotrófico lago La Luna. Los núcleos sedimentarios registraron cambios durante los últimos 20 a 25 años en la composición de las comunidades de amebas testadas (El Sol) y en su dominancia (La Luna), así como el incremento en la tasa de acumulación y las concentraciones de hierro y carbono orgánico. Estos son signos del impacto antropogénico en los lagos, los cuales nos deben alertar para mejorar las medidas de protección para estos ecosistemas únicos, no sólo a nivel local (cráter), sino también con una perspectiva más regional.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Arcellinida]]></kwd>
<kwd lng="en"><![CDATA[Protists]]></kwd>
<kwd lng="en"><![CDATA[Paleoenvironmental reconstruction]]></kwd>
<kwd lng="en"><![CDATA[Crater lakes]]></kwd>
<kwd lng="en"><![CDATA[El Sol]]></kwd>
<kwd lng="en"><![CDATA[La Luna]]></kwd>
<kwd lng="es"><![CDATA[Arcellinida]]></kwd>
<kwd lng="es"><![CDATA[Protistas]]></kwd>
<kwd lng="es"><![CDATA[Reconstrucción paleoambiental]]></kwd>
<kwd lng="es"><![CDATA[Lagos cráter]]></kwd>
<kwd lng="es"><![CDATA[El Sol]]></kwd>
<kwd lng="es"><![CDATA[La Luna]]></kwd>
</kwd-group>
</article-meta>
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