<?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>S2007-42982020000100028</article-id>
<article-id pub-id-type="doi">10.17129/botsci.2227</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estructura poblacional de dos especies de cactáceas columnares en un bosque tropical caducifolio]]></article-title>
<article-title xml:lang="en"><![CDATA[Population structure of two species of columnar cacti in a tropical deciduous forest]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lezama-Delgado]]></surname>
<given-names><![CDATA[Ernesto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mandujano]]></surname>
<given-names><![CDATA[María C.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Prado]]></surname>
<given-names><![CDATA[José M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aquino-Bolaños]]></surname>
<given-names><![CDATA[Elia Nora]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Celis-López]]></surname>
<given-names><![CDATA[Edmond]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez]]></surname>
<given-names><![CDATA[Armando Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Veracruzana Centro de Investigaciones Tropicales ]]></institution>
<addr-line><![CDATA[Xalapa Veracruz]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Ecología Departamento de Ecología de la biodiversidad]]></institution>
<addr-line><![CDATA[ Ciudad de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Veracruzana Centro de Ecoalfabetización y Dialogo de Saberes ]]></institution>
<addr-line><![CDATA[Xalapa Veracruz]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Veracruzana Instituto de Ciencias Básicas ]]></institution>
<addr-line><![CDATA[Xalapa Veracruz]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad Veracruzana Instituto de Neuroetología ]]></institution>
<addr-line><![CDATA[Xalapa Veracruz]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2020</year>
</pub-date>
<volume>98</volume>
<numero>1</numero>
<fpage>28</fpage>
<lpage>35</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-42982020000100028&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-42982020000100028&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-42982020000100028&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes:  La estructura poblacional es un atributo demográfico que se define en parte por el reclutamiento de las especies. Una aproximación para describir la estructura es estimando un ajuste log-normal a la distribución de tallas diamétricas en cactáceas columnares, lo que indicaría si hay un ajuste unimodal o multimodal.  Pregunta:  ¿Cómo es la estructura de tamaños y la distribucón local de las columnares simpátricas Pilosocereus palmeri y Cephalocereus scoparius, que se desarrollan en el bosque tropical caducifolio del centro de Veracruz?  Sitio de estudio y periodo de investigación:  El estudio se realizó en la selva baja caducifolia que se ubica a 5 km de la localidad de Cerro Gordo, municipio de Emiliano, Zapata, Veracruz, México, durante la época de lluvias del 2013.  Métodos:  Medimos el diámetro basal de los individuos de las dos especies columnares en 20 parcelas rectangulares de 50 × 10 metros. Ajustamos el modelo distribución log-normal a las tallas diamétricas y obtuvimos la densidad poblacional y distribución espacial.  Resultados:  La densidad poblacional difiere en más del doble entre las dos especies de columnares. Además, la distribución de frecuencia de tallas diamétricas de P. palmeri se ajustó a una curva log-normal a diferencia de lo estimado en C. scoparius y ambas especies tienen distribución espacial agregada.  Conclusiones:  El ajuste log-normal de las tallas diamétricas de P. palmeri es unimodal e indica reclutamiento constante en la población, pero C. scoparius, tiene reclutamiento en pulsos con distribución de tipo multimodal. Además, ambas especies tienen diferente densidad poblacional, aunque similar distribución espacial agregada.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background:  The population structure is a demographic attribute that defines its viability and indicates the frequency of recruitment of new individuals. An approach to describe the population structure is by fitting a log-normal distribution of diametric sizes in columnar cacti, which indicates whether there is an adjust unimodal or multimodal distribution.  Question:  How is the distribution of diametric sizes and local spatial distribution pattern of the sympatric Pilosocereus palmeri and Cephalocereus scoparius columnar cacti in the tropical deciduous forest of Central Veracruz?  Study site and years of study:  The study was conducted in the tropical deciduous forest which is located 5 km from town of Cerro Gordo area, Veracruz, Mexico, during the 2013 rainy season.  Methods:  We measured the basal diameter of the individuals of the two columnar species in 20 rectangular plots of size 50 × 10 meters. We adjust the log-normal distribution to the diametric size model and obtained the population density and space distribution.  Results:  The population density is different more than double between the two columnar species. In addition, the frequency distribution of diametric sizes of P. palmeri adjusted a log-normal curve in contrast to that recorded in C. scoparius that was in pulse and both species have aggregate space distribution.  Conclusions:  The log-normal adjustment of the diametric sizes of P. palmeri is unimodal and indicates constant recruitment in the population, but C. scoparius has recruitment in pulses with multimodal type distribution. Also, both species have different population density but equal aggregate space distribution.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Distribución]]></kwd>
<kwd lng="es"><![CDATA[estructura]]></kwd>
<kwd lng="es"><![CDATA[log-normal]]></kwd>
<kwd lng="es"><![CDATA[reclutamiento]]></kwd>
<kwd lng="en"><![CDATA[Distribution]]></kwd>
<kwd lng="en"><![CDATA[structure]]></kwd>
<kwd lng="en"><![CDATA[log-normal]]></kwd>
<kwd lng="en"><![CDATA[recruitment]]></kwd>
</kwd-group>
</article-meta>
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