<?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>2007-4298</journal-id>
<journal-title><![CDATA[Botanical Sciences]]></journal-title>
<abbrev-journal-title><![CDATA[Bot. sci]]></abbrev-journal-title>
<issn>2007-4298</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Botánica de México A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-42982020000300441</article-id>
<article-id pub-id-type="doi">10.17129/botsci.2490</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estructura y composición florística de los bosques de Quercus del Volcán Sanganguey, Nayarit, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Structure and floristic composition of the Quercus forests of Sanganguey Volcano, Nayarit, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bravo-Bolaños]]></surname>
<given-names><![CDATA[Oscar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-García]]></surname>
<given-names><![CDATA[José]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-González]]></surname>
<given-names><![CDATA[Arturo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Nayarit Unidad Academica de Ciencias Básicas e Ingenierías ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Geografía Departamento de Geografía Física]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma del Estado de Hidalgo Centro de Investigaciones Biológicas ]]></institution>
<addr-line><![CDATA[Ciudad Universitaria ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2020</year>
</pub-date>
<volume>98</volume>
<numero>3</numero>
<fpage>441</fpage>
<lpage>452</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-42982020000300441&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-42982020000300441&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-42982020000300441&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes:  El conocimiento de la estructura de la vegetación y de los factores ambientales relacionados con su distribución, es fundamental para establecer estrategias de manejo y conservación. En México existen amplias regiones sin este tipo de estudios, como el volcán Sanganguey, Nayarit.  Preguntas:  ¿Qué asociaciones vegetales se desarrollan en el Sanganguey? ¿qué especies tienen importancia estructural y cuáles variables ambientales se relacionan con su distribución?  Especies de estudio:  Árboles y arbustos de importancia estructural.  Sitio y años de estudio:  Asociaciones vegetales del Sanganguey en un periodo anual.  Métodos:  Se establecieron 20 parcelas de 2,500 m2 cada una para el muestreo del estrato arbóreo y 20 subparcelas de 25 m2 cada una para el estrato arbustivo en el Sanganguey (1,500-2,340 m snm). Se estimo área basal, cobertura, densidad y valor de importancia de las especies. Además, se calculó la semejanza florística entre asociaciones y la relación asociaciones-factores ambientales, por medio de análisis de agrupamiento y correspondencia canónica.  Resultados:  Se identificaron 154 especies de plantas vasculares y nueve asociaciones: Q. urbanii-Alnus jorullensis, Quercus aristata-Q. glaucoides, Q. calophylla, Q. castanea-Q. convallata, Q. laeta, Q. obtusata-Pinus devoniana, Q. obtusata-Q. rugosa, Q. praeco-Q. castanea, y Q. salicifolia-Q. magnoliifolia. La altitud, pendiente, predregosidad y materia orgánica fueron las variables más relacionadas con su distribución.  Conclusiones:  La composición, estructura y distribución de los bosques de Quercus del Sanganguey está relacionada con la alta heterogeneidad ambiental a lo largo del gradiente de altitud. La riqueza específica y en asociaciones vegetales la resaltan como área de interés estatal.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background:  Knowledge of the the vegetation structure and the environmental factors related to its distribution is essential to establish management and conservation strategies. In Mexico there are large regions without this type of study, such as the Sanganguey volcano, Nayarit.  Questions:  What plant associations develop in the Sanganguey? Which species have structural importance and what environmental variables are related to their distribution?  Study species:  Structurally important trees and shrubs.  Site and years of study:  Sanganguey plant associations in an annual period.  Methods:  Twenty plots of 2,500 m2 each were established for sampling the tree stratum; and 20 subplots of 25 m2 each, for the shrub stratum in Sanganguey (1,500-2,340 m asl). Basal area, coverage, density and importance value of the species were estimated. In addition, the floristic similarity between associations and the relationship between association-environmental factors was calculated by means of cluster analysis and canonical correspondence.  Results:  In Sanganguey 154 vascular plant species and nine associations were identified: Q. urbanii-Alnus jorullensis, Quercus aristata-Q. glaucoides, Q. calophylla, Q. castanea-Q. convallata, Q. laeta, Q. obtusata-Pinus devoniana, Q. obtusata-Q. rugosa, Q. praeco-Q. castanea, and Q. salicifolia-Q. magnoliifolia. Altitude, slope, predregosity and organic matter were the variables most related to their distribution.  Conclusions:  The composition, structure and distribution of Sanganguey Quercus forests are related to the high environmental heterogeneity along the altitude gradient. Species and plant association&#8217;s richness make it an area of interest to state level.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Altitud]]></kwd>
<kwd lng="es"><![CDATA[análisis multivariado]]></kwd>
<kwd lng="es"><![CDATA[bosque de encino]]></kwd>
<kwd lng="es"><![CDATA[conservación]]></kwd>
<kwd lng="es"><![CDATA[estructura ecológica]]></kwd>
<kwd lng="es"><![CDATA[riqueza de especies]]></kwd>
<kwd lng="en"><![CDATA[Altitude]]></kwd>
<kwd lng="en"><![CDATA[conservation]]></kwd>
<kwd lng="en"><![CDATA[ecological structure]]></kwd>
<kwd lng="en"><![CDATA[multivariate analysis]]></kwd>
<kwd lng="en"><![CDATA[Quercus forest]]></kwd>
<kwd lng="en"><![CDATA[species richness]]></kwd>
</kwd-group>
</article-meta>
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