<?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>S2007-11322018000600009</article-id>
<article-id pub-id-type="doi">10.29298/rmcf.v9i50.227</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estructura y composición de la vegetación en cuatro sitios de la Sierra Madre Occidental]]></article-title>
<article-title xml:lang="en"><![CDATA[Structure and composition of the vegetation in four sites of the Sierra Madre Occidental]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Domínguez Gómez]]></surname>
<given-names><![CDATA[Tilo Gustavo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández González]]></surname>
<given-names><![CDATA[Blanca Nallely]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González Rodríguez]]></surname>
<given-names><![CDATA[Humberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cantú Silva]]></surname>
<given-names><![CDATA[Israel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alanís Rodríguez]]></surname>
<given-names><![CDATA[Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alvarado]]></surname>
<given-names><![CDATA[María del Socorro]]></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 ]]></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[,Centro de Investigación en Alimentación y Desarrollo, A.C  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<volume>9</volume>
<numero>50</numero>
<fpage>9</fpage>
<lpage>34</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11322018000600009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11322018000600009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11322018000600009&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Con el objetivo de evaluar la estructura y composición de especies en bosques de El Salto, Pueblo Nuevo, Durango, se establecieron cuatro sitios de estudio (2 500 m2), donde se ubicaron aleatoriamente 10 parcelas de 100 m2. Las variables registradas fueron altura (m), diámetro a la altura de pecho (cm) y área de copa (m2); la dominancia se calculó a partir del área basal y la densidad, de acuerdo con el número de árboles; se determinó el índice de valor de importancia (IVI). La diversidad y la riqueza de especies se estimaron utilizando los índices de Shannon-Wiener (H´) y Margalef (DMg). La similitud se obtuvo con el modelo de Bray-Curtis. Se identificaron 18 especies distribuidas en nueve géneros. El sitio 2 presentó la mayor diversidad (9 especies), y el de menor correspondió al S1 (6 taxones). En este y en el S3, Quercus sideroxyla registró el valor más alto de importancia ecológica; en S2, le correspondió a Quercus durifolia y en S2 a Pinus cooperi. El índice de Shannon-Wiener (1.51) y el de Margalef (1.79) más grandes se obtuvieron en este último sitio y el menor (0.93) en el ejido Banderas; mientras que el más bajo (0.97) para el de Margalef en el ejido El Brillante. El modelo de Bray-Curtis evidenció semejanza entre S1 y S3, con un valor de 25.59 %. Valores que indican tendencia a la heterogeneidad de los sitios.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The structure and composition of tree species were evaluated in the Sierra Madre Occidental, in the area of El Salto, Pueblo Nuevo, state of Durango, Mexico. Four study sites (2 500 m2) were established, where 10 plots of 100 m2 were randomly located. The registered variables were individual height (m), diameter at breast height (cm), and projected crown area (m2). The dominance of each species was quantitated according to its basal area, and its density, according to the number of individuals. The importance value index (IVI) was then calculated. The diversity and species richness were estimated using the Shannon-Wiener diversity index (H') and the Margalef index (DMg), respectively, and Bray-Curtis ordination was utilized to obtain the similarity between sites. The results show that there were 18 tree species belonging to 9 genera. The Santa Bárbara site exhibited the largest number of species (9), while ejido Adolfo Ruíz Cortines had the smallest (6 species). Quercus sideroxyla is the most ecologically important species in ejido Adolfo Ruíz Cortines and ejido El Brillante, followed by Quercus durifolia in S2, and Pinus cooperi was the most important species in the Santa Bárbara reserve site. Santa Bárbara had the highest Shannon diversity index (1.51), and ejido Banderas had the lowest (0.93). The highest values for the Margalef index (1.79) corresponded to the Santa Bárbara reserve site (S4), and the lowest (0.97), to ejido El Brillante (S2). The Bray-Curtis ordination revealed similarity (25.59 %) between ejido Adolfo Ruíz Cortines and ejido El Brillante, indicating a tendency to heterogeneity.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Heterogeneidad]]></kwd>
<kwd lng="es"><![CDATA[índice de Margalef]]></kwd>
<kwd lng="es"><![CDATA[índice de Shannon-Wiener]]></kwd>
<kwd lng="es"><![CDATA[índice de valor de importancia]]></kwd>
<kwd lng="es"><![CDATA[modelo de ordenación Bray-Curtis]]></kwd>
<kwd lng="es"><![CDATA[riqueza de especies]]></kwd>
<kwd lng="en"><![CDATA[Heterogeneity]]></kwd>
<kwd lng="en"><![CDATA[Margalef index]]></kwd>
<kwd lng="en"><![CDATA[Shannon-Wiener index]]></kwd>
<kwd lng="en"><![CDATA[importance value index]]></kwd>
<kwd lng="en"><![CDATA[Bray-Curtis ordination]]></kwd>
<kwd lng="en"><![CDATA[species richness]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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