<?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>S2007-40182023000100061</article-id>
<article-id pub-id-type="doi">10.5154/r.rchscfa.2022.03.021</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Structural characterization and classification of pinyon pine forests in San Luis Potosí, Mexico]]></article-title>
<article-title xml:lang="es"><![CDATA[Caracterización estructural y clasificación de los bosques piñoneros de San Luis Potosí, México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Parra-Álvarez]]></surname>
<given-names><![CDATA[Joaquín]]></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[Villanueva-Morales]]></surname>
<given-names><![CDATA[Antonio]]></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 Edo. México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma Chapingo Departamento de Preparatoria Agrícola ]]></institution>
<addr-line><![CDATA[Texcoco Edo. México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2023</year>
</pub-date>
<volume>29</volume>
<numero>1</numero>
<fpage>61</fpage>
<lpage>98</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-40182023000100061&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-40182023000100061&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-40182023000100061&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction:  Plant communities dominated by pinyon pines host abundant species, as they often form ecotones between temperate forests and desert shrublands.  Objectives:  To describe the floristic-structural attributes of pinyon pine forests in San Luis Potosí and to analyze the impact of some environmental factors on the characteristics of these associations.  Materials and methods:  Arboreal plants and shrub flora of nine sites was recorded and analyzed quantitatively using the point-centred quarter method, and qualitatively, using physiognomic profiles and Dansereau diagrams. The groups defined with Jaccard's similarity index were ordered with the environmental factors using a canonical correspondence analysis.  Results and discussion:  The floristic richness was 597 species including Pinus cembroides Zucc., Pinus pinceana Gordon. &amp; Glend., Pinus nelsonii Shaw., Pinus discolor D. K. Bailey &amp; Hawksw. and Pinus johannis Rob.-Pass., which form associations with Juniperus flaccida Schltdl., Yucca spp. and Quercus spp. The floristic similarity depends on several factors including altitude, slope, pH, organic matter and calcium in soil.  Conclusion:  Pinyon pine forests in San Luis Potosí are dominated by five species of Pinus with heterogeneous floristic composition, so each community should be managed according to specific ecological characteristics.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción:  Las comunidades vegetales dominadas por pinos piñoneros albergan gran riqueza de especies, ya que, a menudo, forman ecotonos entre los bosques templados y matorrales desérticos.  Objetivos:  Describir los atributos florístico-estructurales de los bosques de pino piñonero de San Luis Potosí y analizar la influencia de algunos factores ambientales en las características de dichas asociaciones.  Materiales y métodos:  La flora arbórea y arbustiva de nueve localidades se registró y analizó de manera cuantitativa mediante el método de cuadrantes centrados en un punto, y de forma cualitativa, mediante perfiles fisonómicos y danserogramas. Los grupos definidos con el índice de similitud de Jaccard se ordenaron con los factores ambientales mediante un análisis de correspondencias canónicas.  Resultados y discusión:  La riqueza florística fue de 597 especies entre las que se encuentran Pinus cembroides Zucc., Pinus pinceana Gordon. &amp; Glend., Pinus nelsonii Shaw., Pinus discolor D. K. Bailey &amp; Hawksw. y Pinus johannis Rob.-Pass., las cuales forman asociaciones con Juniperus flaccida Schltdl., Yucca spp. y Quercus spp. La similitud florística se debe a varios factores entre los que destacan la altitud, pendiente, pH, materia orgánica y calcio del suelo.  Conclusión:  Los bosques piñoneros de San Luis Potosí están dominados por cinco especies de Pinus con una composición florística heterogénea, por lo que cada comunidad debe manejarse atendiendo las particularidades ecológicas que presenta.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Pinus]]></kwd>
<kwd lng="en"><![CDATA[pinyon pine forests]]></kwd>
<kwd lng="en"><![CDATA[plant physiognomy]]></kwd>
<kwd lng="en"><![CDATA[environmental factors]]></kwd>
<kwd lng="en"><![CDATA[multivariate analysis]]></kwd>
<kwd lng="es"><![CDATA[Pinus]]></kwd>
<kwd lng="es"><![CDATA[piñonares]]></kwd>
<kwd lng="es"><![CDATA[fisonomía vegetal]]></kwd>
<kwd lng="es"><![CDATA[factores ambientales]]></kwd>
<kwd lng="es"><![CDATA[análisis multivariado]]></kwd>
</kwd-group>
</article-meta>
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