<?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>S2007-40182018000300275</article-id>
<article-id pub-id-type="doi">10.5154/r.rchscfa.2017.03.018</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Characterization of four pinyon pine forests in the state of Zacatecas, Mexico]]></article-title>
<article-title xml:lang="es"><![CDATA[Caracterización de cuatro bosques de pino piñonero del estado de Zacatecas, México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barrera-Zubiaga]]></surname>
<given-names><![CDATA[Ezra J. E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Granados-Sánchez]]></surname>
<given-names><![CDATA[Diódoro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Granados-Victorino]]></surname>
<given-names><![CDATA[Ro L.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Luna-Cavazos]]></surname>
<given-names><![CDATA[Mario]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma Chapingo División de Ciencias Forestales ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma Chapingo Preparatoria Agrícola ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Colegio de Postgraduados Posgrado en Botánica ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></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>24</volume>
<numero>3</numero>
<fpage>275</fpage>
<lpage>296</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-40182018000300275&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-40182018000300275&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-40182018000300275&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction:  Communities dominated in the canopy by pinyon pines harbor species richness and have complex physiognomy because they form an ecotone between arid and temperate zones.  Objectives:  To describe the floristic attributes that distinguish four communities dominated by pinyon pines; define units based on floristic composition and structure; and determine the influence of edaphic factors.  Materials and methods:  The flora of four communities in the state of Zacatecas was recorded. The arboreal and shrub vegetation was analyzed quantitatively using the point-centered quarter technique. Semi-realistic physiognomic profiles were made for each site. The groups resulting from cluster analysis were ordered with edaphic factors through a canonical correspondence analysis.  Results and discussion:  Floristic richness was 244 species; each community contains between 60 and 80 species. Structurally, three physiognomic variants were recorded: forests dominated by Pinus cembroides Zucc.; association of P. cembroides - P. cembroides var. bicolor Little; and forest dominated by P. maximartinezii Rzed. The pH, electrical conductivity and soil texture have a great influence on the structure and plant composition of the communities. The P. cembroides - P. cembroides var. bicolor association and its accompanying species develop in nutrient-poor soils, while P. maximartinezii forests prefer shallow soils.  Conclusion:  The floristic similarity among communities was low. Each community must be managed differently, meeting the particular requirements of the species that develop there.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción:  Las comunidades dominadas en el dosel por los pinos piñoneros albergan riqueza de especies y presentan fisionomía compleja, debido a que forman un ecotono entre zonas áridas y templadas.  Objetivos:  Describir los atributos florísticos que distinguen a cuatro comunidades dominadas por pinos piñoneros; definir unidades con base en la composición florística y estructura; y determinar la influencia de los factores edáficos.  Materiales y métodos:  Se registró la flora de cuatro comunidades en el estado de Zacatecas. La vegetación arbórea y arbustiva se analizó cuantitativamente mediante la técnica de cuadrantes centrados en un punto. Se hicieron perfiles fisonómicos semirrealistas para cada localidad. Los grupos resultantes de un análisis de conglomerados se ordenaron con los factores edáficos mediante un análisis de correspondencia canónica.  Resultados y discusión:  La riqueza florística fue de 244 especies; cada comunidad contiene entre 60 y 80 especies. Estructuralmente, se registraron tres variantes fisonómicas: bosques dominados por Pinus cembroides Zucc.; asociación de P. cembroides - P. cembroides var. bicolor Little; y bosque dominado por P. maximartinezii Rzed. El pH, la conductividad eléctrica y la textura del suelo influyen en mayor medida sobre la estructura y composición vegetal de las comunidades. La asociación P. cembroides - P. cembroides var. bicolor y sus especies acompañantes se desarrollan en suelos más pobres en nutrientes, mientras que los bosques de P. maximartinezii prefieren suelos someros.  Conclusión:  La semejanza florística entre comunidades fue baja. Cada comunidad debe de ser manejada de forma diferente, atendiendo los requerimientos particulares de las especies que allí se desarrollan.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Pine nut]]></kwd>
<kwd lng="en"><![CDATA[Pinus cembroides]]></kwd>
<kwd lng="en"><![CDATA[Pinus maximartinezii]]></kwd>
<kwd lng="en"><![CDATA[edaphic factors]]></kwd>
<kwd lng="en"><![CDATA[physiognomic structure]]></kwd>
<kwd lng="es"><![CDATA[Piñón]]></kwd>
<kwd lng="es"><![CDATA[Pinus cembroides]]></kwd>
<kwd lng="es"><![CDATA[Pinus maximartinezii]]></kwd>
<kwd lng="es"><![CDATA[factores edáficos]]></kwd>
<kwd lng="es"><![CDATA[estructura fisonómica]]></kwd>
</kwd-group>
</article-meta>
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