<?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>S2007-11322018000300169</article-id>
<article-id pub-id-type="doi">10.29298/rmcf.v9i47.161</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Patrón de distribución espacial de las especies arbóreas de la región de El Salto, Durango]]></article-title>
<article-title xml:lang="en"><![CDATA[Pattern of spatial distribution of the tree species of the El Salto region of Durango]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández]]></surname>
<given-names><![CDATA[Francisco Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Navarro Mata]]></surname>
<given-names><![CDATA[Carlos Brian]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Peña Montañez]]></surname>
<given-names><![CDATA[Raúl]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Nájera Luna]]></surname>
<given-names><![CDATA[Abel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Tecnológico de El Salto División de Estudios de Posgrado e Investigación ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2018</year>
</pub-date>
<volume>9</volume>
<numero>47</numero>
<fpage>169</fpage>
<lpage>186</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11322018000300169&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11322018000300169&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11322018000300169&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: El propósito del presente estudio fue determinar el patrón de distribución espacial de los árboles presentes en la región de El Salto, Pueblo Nuevo, Durango. Para ello, se seleccionaron 12 comunidades representativas de las condiciones de los bosques de la región, donde se ubicaron, de manera aleatoria, 269 sitios circulares de 0.1 ha, distribuidos en un intervalo altitudinal de 1 500 a 3 000 m. El patrón de distribución de los árboles por nivel de altitud se determinó aplicando los índices de Cox y Morisita, mientras que el correspondiente para cada especie se probó con las pruebas de ajuste de la distribución de Poisson y binomial negativa. El grado de agregación se evaluó a través del parámetro de agregación K, proporción de la densidad media por taxón en relación a la media 1/K, el número promedio por individuo por especie, con respecto a los individuos presentes en la unidad de muestreo m*. Los índices de Cox y Morisita variaron de 12.05 a 17.39 y de 1.18 a 1.28, respectivamente, los cuales indican que en cada nivel de altitud los individuos se distribuyen de manera agregada. A su vez, el índice de Cox y el ajuste de la distribución binomial negativa (P&gt;0.05) señalaron que los individuos por especie se distribuyen de manera agregada. Los valores del parámetro K, 1/K y m* variaron de 0.002 a 0.454, 2 a 500 y 9 a 69, respectivamente evidencian un alto grado de agregación entre individuos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: The purpose of this study was to determine the pattern of spatial distribution of trees present in the region of El Salto, Pueblo Nuevo, Durango. For this purpose, 12 communities that are representative of the conditions of the forests of the region were selected, where 269 round sites of 0.1 ha were randomly distributed at an altitude range of 1 500 to 3 000 m. The pattern of distribution of the trees by altitude level was determined by applying Cox&#8217;s and Morisita&#8217;s indices, and the pattern corresponding to each species was tested with the Poisson and negative binomial distribution adjustment tests. The level of aggregation was evaluated through the clustering parameter K, the ratio of the average density per taxon in relation to the mean 1/K, and the average number per individual per species in relation to the individuals present in the sampling unit m*. Cox&#8217;s and Morisita&#8217;s indices ranged from 12.05 to 17.39 and from 1.18 to 1.28, respectively, indicating that at each level of altitude individuals are distributed on an aggregate basis. At the same time, Cox&#8217;s index and the negative binomial distribution adjustment (P&gt;0.05) pointed out that the individuals per species are distributed in clusters. The values of the parameter K, 1/K and m*, which ranged from 0.002 to 0.454, from 2 to 500 and from 9 to 69, respectively, exhibit a high degree of aggregation between individuals.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Distribución binomial negativa]]></kwd>
<kwd lng="es"><![CDATA[distribución espacial]]></kwd>
<kwd lng="es"><![CDATA[distribución de Poisson]]></kwd>
<kwd lng="es"><![CDATA[índice de Cox]]></kwd>
<kwd lng="es"><![CDATA[índice de Morisita]]></kwd>
<kwd lng="es"><![CDATA[parámetro K]]></kwd>
<kwd lng="en"><![CDATA[Negative binomial distribution]]></kwd>
<kwd lng="en"><![CDATA[spatial distribution]]></kwd>
<kwd lng="en"><![CDATA[Poisson distribution]]></kwd>
<kwd lng="en"><![CDATA[Cox&#8217;s Index]]></kwd>
<kwd lng="en"><![CDATA[Morisita&#8217;s Index]]></kwd>
<kwd lng="en"><![CDATA[parameter K]]></kwd>
</kwd-group>
</article-meta>
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