<?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>S2007-11322020000300141</article-id>
<article-id pub-id-type="doi">10.29298/rmcf.v11i59.614</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estructura espacial de los bosques mixtos e irregulares en el estado de Durango]]></article-title>
<article-title xml:lang="en"><![CDATA[Spatial structure of the mixed and uneven-aged forests in the state of Durango]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chávez-Flores]]></surname>
<given-names><![CDATA[Gustavo Alfredo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Corral-Rivas]]></surname>
<given-names><![CDATA[José Javier]]></given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vega-Nieva]]></surname>
<given-names><![CDATA[José Daniel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Serrano]]></surname>
<given-names><![CDATA[Pablito Marcelo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rubio-Camacho]]></surname>
<given-names><![CDATA[Ernesto Alonso]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Juárez del Estado de Durango Maestría Institucional en Ciencias Agropecuarias y Forestales ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Juárez del Estado de Durango Facultad de Ciencias Forestales ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Juárez del Estado de Durango Instituto de Silvicultura e Industria de la Madera ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>(</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<volume>11</volume>
<numero>59</numero>
<fpage>141</fpage>
<lpage>162</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11322020000300141&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11322020000300141&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11322020000300141&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El propósito de este trabajo fue describir la estructura espacial e investigar las interacciones o correlaciones espaciales entre algunas características de árboles en bosques mixtos e irregulares en el estado de Durango. Se usó la localización horizontal y ciertos atributos de los individuos arbóreos de 446 sitios permanentes de investigación forestal y de suelos. La distribución espacial, así como la interacción entre grupos de especies se determinaron con el empleo de estadísticos de segundo orden como la función K de Ripley en sus formas normalizadas univariada L(r) y bivariada L  12 (r). La asociación dimensional de los árboles se evaluó con el uso de la función de correlación de marcas Kmm(r). Estas herramientas estadísticas permitieron determinar que la estructura espacial de los boques estudiados es de naturaleza compleja y dependiente de la escala de evaluación con que se analice. A distancias menores de 2 m domina una distribución espacial aleatoria del arbolado, mientras que a distancias mayores de 2 m predomina el agrupamiento. Por otra parte, en la mayoría de los sitios no se observaron interacciones o mezclas significativas en la distribución de los árboles de Pinus y Quercus, lo cual indica que la regeneración y la silvicultura siguen un patrón aleatorio. El análisis de la interacción espacial entre los tamaños de los diámetros de los árboles significa la existencia de un patrón de distribución espacial independiente, en el que los individuos de diferentes diámetros están mezclados de manera aleatoria dentro de los sitios de muestreo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The purpose of this work was to describe the spatial structure and research the interactions or correlations among certain tree characteristics in the mixed and uneven-aged forests in the state of Durango. Data of individual tree location and other tree attributes of 446 permanent forest research plots were used. The spatial tree distribution and the interactions among groups of species were determined with the use of the second-order statistic known as Ripley's K function in its univariate L(r) and bivariate L  12 (r) normalized forms. The dimensional association between the sizes of the tree diameters was evaluated with the use of the mark correlation function Kmm(r). The results provided by these statistical tools allow to determine that the spatial structure of the evaluated forests has a complex nature and depends on the scale at which it is analyzed. At distances under 2 m, the random spatial distribution of the trees dominates, while at distances over 2 m the clustering of trees is prevalent. On the other hand in most of the studied sites no significant interactions or mixtures in the spatial distribution of trees of pine and oak were observed, indicating that regeneration and selective silviculture follow a random pattern. The analysis of the spatial interaction between the tree diameter sizes keeps an independent spatial distribution pattern, in which trees with different diameters are mixed randomly within the studied sites.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Distribución espacial]]></kwd>
<kwd lng="es"><![CDATA[función de correlación de marcas]]></kwd>
<kwd lng="es"><![CDATA[función K de Ripley]]></kwd>
<kwd lng="es"><![CDATA[patrón de puntos]]></kwd>
<kwd lng="es"><![CDATA[Sierra Madre Occidental]]></kwd>
<kwd lng="es"><![CDATA[sitios permanentes de investigación forestal y de suelos]]></kwd>
<kwd lng="en"><![CDATA[Spatial distribution]]></kwd>
<kwd lng="en"><![CDATA[mark correlation function]]></kwd>
<kwd lng="en"><![CDATA[Ripley's K function]]></kwd>
<kwd lng="en"><![CDATA[point pattern]]></kwd>
<kwd lng="en"><![CDATA[Sierra Madre Occidental]]></kwd>
<kwd lng="en"><![CDATA[permanent forest and soil research sites]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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