<?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>S2007-42982020000200238</article-id>
<article-id pub-id-type="doi">10.17129/botsci.2392</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Population structure of Alnus jorullensis, a species used as firewood by five rural communities in a natural protected area of Mexico]]></article-title>
<article-title xml:lang="es"><![CDATA[Estructura poblacional de Alnus jorullensis, una especie utilizada como leña por cinco comunidades rurales en un área natural protegida de México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Sánchez]]></surname>
<given-names><![CDATA[Carla Leticia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bolívar-Cimé]]></surname>
<given-names><![CDATA[Beatriz]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aparicio-Rentería]]></surname>
<given-names><![CDATA[Armando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Viveros-Viveros]]></surname>
<given-names><![CDATA[Héctor]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Veracruzana Instituto de Investigaciones Forestales ]]></institution>
<addr-line><![CDATA[Xalapa Veracruz]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<volume>98</volume>
<numero>2</numero>
<fpage>238</fpage>
<lpage>247</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-42982020000200238&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-42982020000200238&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-42982020000200238&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background:  Ilite (Alnus jorullensis) is a very important pioneer species for the regeneration of temperate forests but also the source of fuel for the inhabitants of the Cofre de Perote National Park in Veracruz, Mexico.  Questions:  How much ilite is consumed by families in the Cofre de Perote National Park? What type of population structure is exhibited by Alnus jorullensis? Are there differences in population structure of this species between years? What is the diameter of the individuals extracted for firewood?  Study site and dates:  The population structure of ilite was evaluated during April 2016 and April 2017 in five localities of the Cofre de Perote National Park.  Methods:  Eighty families in these localities were interviewed about the use of firewood. Eighteen permanent plots of 20 × 50 m were established in order to record total height and diameter at breast height (130 cm) of standing trees of A. jorullensis and the basal diameter of its stumps.  Results:  Families in the study area indicated that they use in average 2 loads of ilite as firewood per week and extract adult individuals. Population density of ilite decreased from 2016 to 2017, in both years juvenile individuals were predominant, with a low presence of seedlings. Population structure did not differ between years. The basal diameters of stumps measured between 6 and 214 cm.  Conclusions:  Extraction of A. jorullensis did not change its population structure between years, however local inhabitants perceive that this activity and clandestine logging are affecting their availability.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes:  El Ilite (Alnus jorullensis) es una especie pionera importante para la regeneración de bosques templados y como fuente de combustible para los habitantes del Parque Nacional Cofre de Perote National en Veracruz, Mexico.  Preguntas:  ¿Cuánto ilite consumen las familias como leña en el Parque Nacional Cofre de Perote? ¿Qué tipo de estructura poblacional exhibe Alnus jorullensis? ¿Existen diferencias en la estructura poblacional entre años? ¿Cuál es el diámetro de los individuos extraídos para leña?  Sitios y años de estudio:  La estructura poblacional del ilite fue evaluada en abril 2016 y abril 2017 en cinco localidades del Parque Nacional Cofre de Perote.  Métodos:  Ochenta familias en estas localidades fueron entrevistadas sobre el uso de leña. Dieciocho parcelas permanentes de 20 × 50 m fueron establecidas para registrar la altura total y el diámetro a la altura del pecho (130 cm) de los árboles de A. jorullensis en pie y el diámetro basal de los tocones.  Resultados:  Las familias entrevistadas dijeron consumir en promedio 2 cargas de ilite por semana y extraer individuos adultos. La densidad de A. jorullensis disminuyó de 2016 a 2017, en ambos años individuos juveniles fueron predominantes con escasa presencia de plántulas. La estructura de la población no difirió entre años. El diámetro basal de los tocones estuvo entre 6 y 214 cm.  Conclusiones:  La extracción de Alnus jorullensis no modificó su estructura poblacional entre años. Sin embargo, los habitantes entrevistados perciben que esta actividad junto con la tala clandestina está afectando su disponibilidad.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[extraction]]></kwd>
<kwd lng="en"><![CDATA[ilite]]></kwd>
<kwd lng="en"><![CDATA[recruitment]]></kwd>
<kwd lng="en"><![CDATA[saplings]]></kwd>
<kwd lng="en"><![CDATA[seedlings]]></kwd>
<kwd lng="en"><![CDATA[stumps]]></kwd>
<kwd lng="es"><![CDATA[extracción]]></kwd>
<kwd lng="es"><![CDATA[ilite]]></kwd>
<kwd lng="es"><![CDATA[juveniles]]></kwd>
<kwd lng="es"><![CDATA[plántulas]]></kwd>
<kwd lng="es"><![CDATA[reclutamiento]]></kwd>
<kwd lng="es"><![CDATA[tocones]]></kwd>
</kwd-group>
</article-meta>
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