<?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>0187-7151</journal-id>
<journal-title><![CDATA[Acta botánica mexicana]]></journal-title>
<abbrev-journal-title><![CDATA[Act. Bot. Mex]]></abbrev-journal-title>
<issn>0187-7151</issn>
<publisher>
<publisher-name><![CDATA[Instituto de Ecología A.C., Centro Regional del Bajío]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-71512019000100151</article-id>
<article-id pub-id-type="doi">10.21829/abm126.2019.1492</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Morfometría y patrones de distribución de Melocactus violaceus subsp. margaritaceus (Cactaceae), en dos ecosistemas contrastantes brasileños]]></article-title>
<article-title xml:lang="en"><![CDATA[Morphometry and distribution patterns of Melocactus violaceus subsp. margaritaceus (Cactaceae), in two contrasting Brazilian ecosystems]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Larios Ulloa]]></surname>
<given-names><![CDATA[Mauricio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vinicius Meiado]]></surname>
<given-names><![CDATA[Marcos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Loza Cornejo]]></surname>
<given-names><![CDATA[Sofía]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Santos]]></surname>
<given-names><![CDATA[Katiane da Conceição]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Guadalajara Centro Universitario de los Lagos ]]></institution>
<addr-line><![CDATA[Lagos de Moreno Jalisco]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidade Federal de Sergipe  ]]></institution>
<addr-line><![CDATA[Itabaiana Sergipe]]></addr-line>
<country>Brazil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<numero>126</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-71512019000100151&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-71512019000100151&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-71512019000100151&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Antecedentes y Objetivos: Melocactus violaceus una cactácea endémica que se distribuye en el este de Brasil, está categorizada como especie vulnerable en la Lista Roja de la IUCN debido a la pérdida de hábitat. Esta investigación se realizó en dos ecosistemas contrastantes brasileños, caatinga (Parque Nacional Sierra de Itabaiana) y restinga (Playa de Pirambu), con el objetivo de determinar los patrones de distribución, densidad, caracteres morfométricos vegetativos (altura y diámetro del tallo) y reproductivos (presencia de cefalio, morfología de flor, fruto y semilla) de esta subespecie y destacar la posible influencia del hábitat sobre sus poblaciones.  Métodos: Para cada una de las áreas de estudio se analizaron y compararon patrones de distribución, densidad, porcentaje de mortalidad y caracteres morfométricos de estructuras vegetativas (altura y diámetro del tallo) y reproductivas (longitud y diámetro de flor, fruto y semilla), mediante análisis estadísticos (ANDEVA, pruebas de comparaciones múltiples de Tukey y coeficientes de correlación de Pearson).  Resultados clave: Los resultados demostraron una densidad de 0.52 y 0.44 individuos/m2 en caatinga y restinga, respectivamente. Más de 65% de los individuos se establecen en parches libres de vegetación en ambas zonas. Los valores promedio de caracteres morfométricos están dentro de los establecidos para la subespecie, aunque se observaron diferencias estadísticas significativas (p&lt;0.05) al comparar los dos sitios de estudio. Los coeficientes de correlación de Pearson más altos y significativos fueron para las variables longitud fruto vs. diámetro fruto (r=0.9909) y longitud fruto vs. diámetro flor (r=0.9907).  Conclusiones: En caatinga se registró mayor densidad e índice de mortalidad, mientras que un porcentaje mayor de individuos con cefalio fue registrado en restinga. Las diferencias registradas representarían un indicativo de la probable influencia ambiental, particularmente el microhábitat sobre algunos caracteres morfométricos de los individuos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Background and Aims: Melocactus violaceus an endemic cactus distributed in eastern Brazil, is classified as a vulnerable species in the IUCN Red List due to habitat loss. This research was conducted in two contrasting Brazilian ecosystems, caatinga (Serra de Itabaiana National Park) and restinga (Pirambu beach), with the aim of determining the distribution patterns, density, vegetative morphometric characters (height and diameter of the stem) and reproductive characters (presence of cephalium, morphology of flower, fruit and seed) of this subspecies and highlight the possible influence of the habitat on its populations.  Methods: For each of the study areas, patterns of distribution, density, mortality index, morphometric characters of vegetative (height and diameter stem) and reproductive structures (length and diameter of flower, fruit and seed) were analyzed through statistical analyses (ANOVA, Tukey multiple comparison tests and Pearson correlation coefficients).  Key results: The results showed a density of 0.52 and 0.44 individuals/m2 in caatinga and restinga, respectively. More than 65% of individuals establish themselves in vegetation-free patches in both zones. The average values of morphometric characters are within those established for the subspecies, although significant statistical differences were observed (p&lt;0.05) when comparing the two study sites. The Pearson correlation coefficients were significant for the variables fruit length vs. fruit diameter (r=0.9909) and fruit length vs. flower diameter (r=0.9907).  Conclusions: In caatinga, there was a greater density and death rate, whereas a greater percentage of individuals with cephalium was registered in restinga. The registered differences would represent an indication of the probable environmental influence, particularly of microhabitat on some morphometric characters of individuals.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[caatinga]]></kwd>
<kwd lng="es"><![CDATA[cactácea]]></kwd>
<kwd lng="es"><![CDATA[endemismo]]></kwd>
<kwd lng="es"><![CDATA[Mata Atlântica]]></kwd>
<kwd lng="es"><![CDATA[restinga]]></kwd>
<kwd lng="en"><![CDATA[Atlantic forest]]></kwd>
<kwd lng="en"><![CDATA[caatinga]]></kwd>
<kwd lng="en"><![CDATA[cactus]]></kwd>
<kwd lng="en"><![CDATA[endemism]]></kwd>
<kwd lng="en"><![CDATA[restinga]]></kwd>
</kwd-group>
</article-meta>
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