<?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>S1870-34532017000300625</article-id>
<article-id pub-id-type="doi">10.1016/j.rmb.2017.07.009</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Riqueza y composición de helechos y licófitos en tres áreas de bosque mesófilo en Los Tuxtlas, Veracruz, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Richness and composition of ferns and lycophytes in three areas of humid montane forest in Los Tuxtlas, Veracruz, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Acebey]]></surname>
<given-names><![CDATA[Amparo R.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Acosta]]></surname>
<given-names><![CDATA[Juan Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tejero-Díez]]></surname>
<given-names><![CDATA[J. Daniel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Krömer]]></surname>
<given-names><![CDATA[Thorsten]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Veracruzana Centro de Investigaciones Tropicales ]]></institution>
<addr-line><![CDATA[Xalapa Veracruz]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Estudios Superiores Iztacala ]]></institution>
<addr-line><![CDATA[Tlalnepantla Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2017</year>
</pub-date>
<volume>88</volume>
<numero>3</numero>
<fpage>625</fpage>
<lpage>635</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-34532017000300625&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-34532017000300625&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-34532017000300625&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: El bosque mesófilo de montaña (BMM) en México es el ecosistema con mayor riqueza de flora por área, donde destacan los helechos y licófitos por su riqueza y abundancia. Sin embargo, existen pocos estudios comparativos de cómo cambian la riqueza y composición de especies en las diferentes áreas de BMM, siguiendo una metodología estándar. Con este fin, se muestrearon 10-13 parcelas de 20 × 20 m cada una, en 3 áreas de BMM en los 2 volcanes principales de la región de Los Tuxtlas, Veracruz. Se comparó la riqueza de especies y se analizó la similitud florística mediante Anosim y escalamiento multidimensional (NMDS); además, se identificaron las especies que contribuyen más a la disimilitud. Se registraron 71 especies de helechos y 3 de licófitos, en 37 géneros y 15 familias. Las diferencias en la riqueza en las 3 áreas no fueron significativas, mientras que la composición de especies sí mostró diferencias significativas. Estas diferencias se explican por especies exclusivas o con frecuencias contrastantes entre áreas, cuyas características parecen estar fuertemente relacionadas con el microclima y los suelos, así como con la intensidad de perturbación antropogénica. La alta variación en la composición florística por área constituye información relevante para plantear estrategias de conservación de estas plantas a nivel regional.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: The humid montane forest in Mexico, where ferns and lycophytes are diverse and abundant, is the richest ecosystem floristically per unit area. However, there are few comparative studies using a standard methodology on how richness and species composition change in different areas of this type of forest. Therefore, we sampled 10-13 plots of 20 × 20 m each in 3 areas of this forest at the 2 main volcanoes in the region of Los Tuxtlas, Veracruz. We compared species richness and analyzed floristic similarity by Anosim and non-metric multidimensional scaling (NMDS); we also identified the species that contribute most to the dissimilarity. Within our plots, we recorded 71 species of ferns and 3 of lycophytes in 37 genera and 15 families. Differences in species richness in the 3 areas were not significant, whereas species composition showed significant differences. These differences can be explained by the presence of unique species or contrasting frequencies between areas whose characteristics appear to be strongly related to the microclimate and soil, as well as to the degree of anthropogenic disturbance. The high variation in the floristic composition per area is relevant for proposing conservation strategies of these plants at the regional level.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Distribución]]></kwd>
<kwd lng="es"><![CDATA[Epífitas]]></kwd>
<kwd lng="es"><![CDATA[Gradiente altitudinal]]></kwd>
<kwd lng="es"><![CDATA[Inventario florístico]]></kwd>
<kwd lng="es"><![CDATA[Polypodiaceae]]></kwd>
<kwd lng="es"><![CDATA[Pteridoflora]]></kwd>
<kwd lng="en"><![CDATA[Distribution]]></kwd>
<kwd lng="en"><![CDATA[Epiphytes]]></kwd>
<kwd lng="en"><![CDATA[Elevational gradient]]></kwd>
<kwd lng="en"><![CDATA[Floristic inventory]]></kwd>
<kwd lng="en"><![CDATA[Polypodiaceae]]></kwd>
<kwd lng="en"><![CDATA[Pteridophytes]]></kwd>
</kwd-group>
</article-meta>
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