<?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>2007-1132</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias forestales]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. de cienc. forestales]]></abbrev-journal-title>
<issn>2007-1132</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-11322022000500050</article-id>
<article-id pub-id-type="doi">10.29298/rmcf.v13i73.1252</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estructura y composición florística de un bosque de Pinus-Quercus en El Porvenir, Chiapas]]></article-title>
<article-title xml:lang="en"><![CDATA[Structure and floristic composition of a Pinus-Quercus forest in El Porvenir, Chiapas State]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barrios-Calderón]]></surname>
<given-names><![CDATA[Romeo de Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez Pérez]]></surname>
<given-names><![CDATA[Javier Ernesto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Torres Velázquez]]></surname>
<given-names><![CDATA[Jony Ramiro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aguirre-Cadena]]></surname>
<given-names><![CDATA[Juan Francisco]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Chiapas Facultad de Ciencias Agrícolas ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Ciencias y Artes de Chiapas Facultad de Ingeniería ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Tecnológico Nacional de México Instituto Tecnológico del Valle del Yaqui ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>10</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>10</month>
<year>2022</year>
</pub-date>
<volume>13</volume>
<numero>73</numero>
<fpage>50</fpage>
<lpage>74</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11322022000500050&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11322022000500050&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11322022000500050&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Los bosques de Pinus-Quercus constituyen ecosistemas de gran importancia ecológica. La estructura y composición son indicadores de la biodiversidad en estas asociaciones forestales, en las cuales esos dos elementos son clave para su estabilidad y conservación. El objetivo del presente estudio fue caracterizar un bosque de Pinus-Quercus a través de los parámetros estructurales y de la composición de especies presentes en el estrato arbóreo en el municipio El Porvenir, Chiapas. Se establecieron seis sitios circulares de muestreo, con una superficie de 400 m2 para evaluar el arbolado adulto y sus variables dasométricas (altura total, diámetro normal y cobertura). Los parámetros estructurales del bosque (densidad, dominancia, área basal y cobertura) se emplearon para calcular los índices de Valor de Importancia, valor forestal, complejidad de Holdrige y los índices de similitud. Los resultados mostraron la presencia de seis especies; Pinus maximinoi registró una altura media de 18.88±6.72 m (p&lt;0.0001, F=5.46) superior a los otros taxones. Además, le correspondió el mayor diámetro normal (30.58±13.64 cm, p&lt;0.0002, F=5.18), Valor de Importancia (161.07 %) y valor forestal (108.08 %). El índice de complejidad de Holdrige del bosque fue de 45.22 %. Los resultados obtenidos permitieron identificar las dimensiones, parámetros estructurales y dominancia de las especies; de ellas, Pinus maximinoi fue la de mayor valor.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Pinus-Quercus forests are ecosystems of great ecological importance. Structure and composition are indicators of biodiversity in these forest associations, being two key elements for their stability and conservation. The objective of this study was to characterize a Pinus-Quercus forest based con the structural parameters and species composition present in the arboreal stratum in the municipality of El Porvenir, Chiapas. Six 400 m2 circular sites were established to evaluate the adult trees and their dasometric variables (total height, normal diameter and cover). The structural parameters of the forest (density, dominance, basal area and cover) were used to calculate the indexes of Importance Value, forest value, Holdrige complexity index and similarity index. The results showed the presence of six species; Pinus maximinoi exhibited a mean height of 18.88±6.72 m (p&lt;0.0001, F= 5.46), which is greater than that of other species. In addition, it has the highest normal diameter (30.58±13.64 cm, p&lt;0.0002, F=5.18), Importance Value (161.07 %) and forest value (108.08 %). The Holdrige complexity index of the forest is 45.22 %. The results obtained made it possible to identify the dimensions, structural parameters, and dominance of the species, with Pinus maximinoi being the most valuable.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Arreglo forestal]]></kwd>
<kwd lng="es"><![CDATA[bosque de pino-encino]]></kwd>
<kwd lng="es"><![CDATA[coeficiente de Sørensen]]></kwd>
<kwd lng="es"><![CDATA[complejidad de Holdrige]]></kwd>
<kwd lng="es"><![CDATA[densidad de arbolado]]></kwd>
<kwd lng="es"><![CDATA[valor forestal]]></kwd>
<kwd lng="en"><![CDATA[Forest arrangement]]></kwd>
<kwd lng="en"><![CDATA[pine-oak forest]]></kwd>
<kwd lng="en"><![CDATA[Sørensen's index]]></kwd>
<kwd lng="en"><![CDATA[Holdrige complexity index]]></kwd>
<kwd lng="en"><![CDATA[tree density]]></kwd>
<kwd lng="en"><![CDATA[forest value index]]></kwd>
</kwd-group>
</article-meta>
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