<?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>S2007-11322024000500048</article-id>
<article-id pub-id-type="doi">10.29298/rmcf.v15i85.1461</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estructura arbórea en dos exposiciones de un bosque de pino en Cochoapa El Grande, Guerrero]]></article-title>
<article-title xml:lang="en"><![CDATA[Tree structure in two exposures of a pine forest in Cochoapa El Grande, state of Guerrero]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Calleja-Peláez]]></surname>
<given-names><![CDATA[Beatriz]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-López]]></surname>
<given-names><![CDATA[Bernardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alanís-Rodriguez]]></surname>
<given-names><![CDATA[Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Telles-Antonio]]></surname>
<given-names><![CDATA[Ricardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Tagle]]></surname>
<given-names><![CDATA[Marco Aurelio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cano-Abad]]></surname>
<given-names><![CDATA[Josafat]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Intercultural del Estado de Guerrero  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma de Nuevo León Facultad de Ciencias Forestales ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Mexiquense del Bicentenario  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>10</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>10</month>
<year>2024</year>
</pub-date>
<volume>15</volume>
<numero>85</numero>
<fpage>48</fpage>
<lpage>69</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11322024000500048&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11322024000500048&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11322024000500048&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo de la presente investigación fue evaluar la estructura, composición y similitud de especies arbóreas en dos exposiciones: Noroeste (NO) y Sureste (SE) de un bosque templado en la comunidad Cochoapa El Grande, Guerrero, México. En cada una de las exposiciones se establecieron de manera aleatoria seis parcelas de 500 m2 cada una; las variables dasométricas evaluadas fueron altura total (m) y diámetro normal (DN, d  1.30m , cm). Con ello se determinó la distribución dasométrica, Índice de Valor de Importancia (IVI), el Índice de Pretzsch y el Índice de similitud de Sørensen. La densidad promedio del área fue de 810 ind ha-1, con cuatro especies del género Pinus; en la exposición SE se presentó la mayor abundancia (1 040 ind ha-1), con 25.30 m2 ha-1 en área basal y un volumen de 225.21 m3 ha-1. En la exposición NO se registraron tres especies, con 580 ind ha-1, 39.80 m2 ha-1 y un volumen de 415.15 m3 ha-1. La especie con el valor de IVI más alto fue P. pseudostrobus (NO=86.86 % y SE=68.65 %). A través del Índice de Pretzsch se definieron tres estratos: NO tuvo A=1.30, A  máx =2.20 y A  rel =59.08 %; en la exposición SE los registros fueron de A=1.26, A  máx =2.48 y A  rel =50.69 %. La composición arbórea entre exposiciones mostró una similitud alta (86 %). La exposición y las condiciones climáticas contribuyen a la distribución y adaptación de diversas especies, ya que se modifican los parámetros de altura y área basal.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The objective of this research was to evaluate the structure, composition and similarity of tree species in two exposures: Northwest (NW) and Southeast (SE) of a temperate forest in the community of Cochoapa El Grande, Guerrero, Mexico. In each of the exposures, six plots of 500 m2 each were randomly established. The assessed mensuration variables were total height (m) and normal diameter (m) (ND, d  1.30m , cm); the mensuration distribution, Importance Value Index (IVI), Pretzsch Index, and Sørensen's similarity index were determined based on those variables. The average density of the area was 810 ind ha-1, with four Pinus species; the SE exposure had the highest abundance (1 040 ind ha-1), with a basimetric area of 25.30 m2 ha-1 and a volume of 225.21 m3 ha-1. In the NW exposure, three species were recorded, with 580 ind ha-1, 39.80 m2 ha-1, and a volume of 415.15 m3 ha-1. The species with the highest IVI value was P. pseudostrobus (NW=86.86 % and SE=68.65 %). Three strata were defined by means of the Pretzsch Index: The values for the NW exposure were A=1.30, A  max =2.20, and A  rel =59.08 %; in the SE exposure, the recorded values were A=1.26, A  max =2.48, and A  rel =50.69 %. The tree composition exhibited a high similarity (86 %) between the two exposures. Exposure and climatic conditions contribute to the distribution and adaptation of various species, as height and basimetric area parameters are modified.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Área basal]]></kwd>
<kwd lng="es"><![CDATA[Índice de Pretzsch]]></kwd>
<kwd lng="es"><![CDATA[Índice de Similitud de Sørensen]]></kwd>
<kwd lng="es"><![CDATA[Índice de Valor de Importancia]]></kwd>
<kwd lng="es"><![CDATA[Pinus pseudostrobus Lindl.]]></kwd>
<kwd lng="es"><![CDATA[volumen]]></kwd>
<kwd lng="en"><![CDATA[Basimetric area]]></kwd>
<kwd lng="en"><![CDATA[Pretzsch Index]]></kwd>
<kwd lng="en"><![CDATA[Sørensen's Similarity Index]]></kwd>
<kwd lng="en"><![CDATA[Importance Value Index]]></kwd>
<kwd lng="en"><![CDATA[Pinus pseudostrobus Lindl.]]></kwd>
<kwd lng="en"><![CDATA[volume]]></kwd>
</kwd-group>
</article-meta>
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