<?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>2007-4018</journal-id>
<journal-title><![CDATA[Revista Chapingo serie ciencias forestales y del ambiente]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Chapingo ser. cienc. for. ambient]]></abbrev-journal-title>
<issn>2007-4018</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma Chapingo, Coordinación de Revistas Institucionales]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-40182023000300129</article-id>
<article-id pub-id-type="doi">10.5154/r.rchscfa.2023.02.011</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Maximum size-density relationship for mixed forests of Nuevo San Juan Parangaricutiro, Michoacán, Mexico]]></article-title>
<article-title xml:lang="es"><![CDATA[Relación densidad-tamaño máxima para bosques mixtos de Nuevo San Juan Parangaricutiro, Michoacán, México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Martínez]]></surname>
<given-names><![CDATA[Abel J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reyes-Hernández]]></surname>
<given-names><![CDATA[Valentín J.]]></given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Santos-Posadas]]></surname>
<given-names><![CDATA[Héctor M. de los]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Velázquez-Martínez]]></surname>
<given-names><![CDATA[Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quiñonez-Barraza]]></surname>
<given-names><![CDATA[Gerónimo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados  ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP)  ]]></institution>
<addr-line><![CDATA[Durango Durango]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<volume>29</volume>
<numero>3</numero>
<fpage>129</fpage>
<lpage>146</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-40182023000300129&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-40182023000300129&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-40182023000300129&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction:  The maximum size-density relationship (MSDR) describes the dynamics of species-mixed stands, and it is essential in the implementation of silvicultural treatments for density control.  Objective:  To analyze the influence of species composition on MSDR in mixed temperate forests of Nuevo San Juan Parangaricutiro, Michoacán, Mexico.  Materials and methods:  MSDR was analyzed with a potential and an exponential model under two approaches with observations of mixed species stands. The first (E1) described the MSDR trajectory without taking into account the proportion of species and the second (E2) included the proportion of species in four groups: Pinus, Quercus, other conifers and broadleaves. Both approaches were analyzed with stochastic frontier regression (SFR) and quantile regression (QR).  Results and discussion:  E1 results were favorable with the use of RC, as it showed a higher trajectory of the data to define MSDR in a linear and concave manner. In E2, the allometric coefficients of the size-density relationship for the four species groups were different and RC estimated the MSDR with species proportion adequately. In shade tolerant species (other conifers and broadleaves), the estimated slope was more negative compared to intolerant species (Pinus and Quercus).  Conclusions:  For mixed forests, MSDR is adequately explained when it is dependent on species composition, because it influences the behavior of the maximum density line, useful for planning density management strategies in mixed forests.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción: La relación densidad-tamaño máxima (RDTM) describe la dinámica de los rodales con mezcla de especies y es fundamental en la implementación de tratamientos silvícolas para el control de la densidad.  Objetivo: Analizar la influencia de la composición de especies en la RDTM en bosques templados mixtos de Nuevo San Juan Parangaricutiro, Michoacán, México.  Materiales y métodos: Se analizó la RDTM con un modelo potencial y otro exponencial con observaciones de rodales con mezcla de especies y bajo dos enfoques. El primero (E1) describió la trayectoria de la RDTM sin considerar la proporción de especies y el segundo (E2) incluyó la proporción de especies en cuatro grupos: Pinus, Quercus, otras coníferas y latifoliadas. Ambos enfoques se analizaron con regresión de frontera estocástica (RFE) y regresión por cuantiles (RC).  Resultados y discusión: Los resultados de E1 fueron favorables con el uso de RC, ya que mostró una trayectoria superior de los datos para definir la RDTM en forma lineal y cóncava. En el E2 se diferenciaron los coeficientes alométricos de la relación densidad-tamaño para los cuatro grupos de especies y RC estimó la RDTM con proporción de especies de manera adecuada. En las especies tolerantes a la sombra (otras coníferas y latifoliadas), la pendiente estimada fue más negativa respecto a las intolerantes (Pinus y Quercus).  Conclusiones : Para los bosques mixtos, la RDTM se explica de forma adecuada cuando es dependiente de la composición de las especies, ya que esta influye en el comportamiento de la línea de máxima densidad, útil para la planeación de estrategias de manejo de la densidad en bosques mezclados.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[temperate forests]]></kwd>
<kwd lng="en"><![CDATA[potential model]]></kwd>
<kwd lng="en"><![CDATA[exponential model]]></kwd>
<kwd lng="en"><![CDATA[Reineke stand density index]]></kwd>
<kwd lng="en"><![CDATA[density guide.]]></kwd>
<kwd lng="es"><![CDATA[bosques templados]]></kwd>
<kwd lng="es"><![CDATA[modelo potencial]]></kwd>
<kwd lng="es"><![CDATA[modelo exponencial]]></kwd>
<kwd lng="es"><![CDATA[relación de Reineke]]></kwd>
<kwd lng="es"><![CDATA[guía de densidad]]></kwd>
</kwd-group>
</article-meta>
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