<?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>S2007-42982020000300597</article-id>
<article-id pub-id-type="doi">10.17129/botsci.2545</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Distribución y conservación de Portulaca (Portulacaceae) en Cuba]]></article-title>
<article-title xml:lang="en"><![CDATA[Distribution and conservation of Portulaca (Portulacaceae) in Cuba]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Beltrán]]></surname>
<given-names><![CDATA[José Angel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
<xref ref-type="aff" rid="A a"/>
<xref ref-type="aff" rid="A3"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barrios]]></surname>
<given-names><![CDATA[Duniel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Toledo]]></surname>
<given-names><![CDATA[Sandy]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Testé]]></surname>
<given-names><![CDATA[Ernesto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de La Habana Jardín Botánico Nacional ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Grupo de Especialistas en Plantas Cubanas  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Concepción Facultad de Ciencias Naturales y Oceanográficas ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Chile</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>597</fpage>
<lpage>617</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-42982020000300597&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-42982020000300597&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-42982020000300597&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes:  En Cuba, los estudios sobre Portulaca carecen de un consenso de los taxones presentes. Las especies se encuentran pobremente representadas en colecciones de herbario y para ellas se infieren distribuciones geográficas más amplias. Esta situación dificulta la evaluación de su riesgo de extinción y, por tanto, la implementación de acciones de conservación.  Preguntas:  ¿Cómo se distribuyen las Portulaca nativas y naturalizadas en Cuba? ¿Cuál es el estado de conservación de las especies nativas?  Sitio y años de estudio:  Cuba, 1902-2020.  Métodos:  Se georreferenciaron los registros de presencia de las especies y de cada una se determinó la distribución geográfica, ecológica y fitogeográfica. El estado de conservación de las especies nativas se evaluó según las categorías y criterios de IUCN.  Resultados: Portulaca en Cuba incluye 11 especies nativas (una endémica) y una naturalizada, distribuidas en todo el país, mayormente en complejos de vegetación de costa y matorrales xeromorfos. Tres especies se encuentran En Peligro Crítico, cinco En Peligro, una Casi Amenazada y dos en Preocupación Menor. Las principales amenazas son la ganadería y los incendios. En la mayoría de las especies, menos de la mitad del área de ocupación se encuentra en áreas protegidas.  Conclusiones:  Se actualizó la distribución de Portulaca en Cuba y se presenta la primera evaluación completa del estado de conservación del género en el país. Entre las especies no pueden identificarse patrones de disyunción o vicarianza, geográfica o ecológica. La mayoría de las especies están amenazadas de extinción, aunque el género está ampliamente representado en áreas protegidas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background:  The studies on Portulaca in Cuba lack a consensus about the taxa found in the country. The species are poorly represented in herbarium collections and for them broader geographical distributions are inferred. This situation makes it difficult to assess the risk of extinction of Portulaca in Cuba and, therefore, the implementation of conservation actions.  Questions:  How are native and naturalized Portulaca species distributed in Cuba? What is the conservation status of the native species?  Study site and dates:  Cuba, 1902-2020.  Methods:  The presence records of species were georeferenced and the geographical, ecological and phytogeographic distribution was determined for each. The conservation status of native species was evaluated according to the IUCN categories and criteria.  Results: Portulaca in Cuba includes 11 native (one endemic) and one naturalized species, distributed throughout the country, mostly in coastal vegetation complexes and xeromorphic scrublands. Three species are Critically Endangered, five Endangered, one Near Threatened and two are considered as Least Concern. The main threats are ranching and fires. In most species, less than half of the area of occupancy is in protected areas.  Conclusions:  The distribution of Portulaca in Cuba was updated and the first complete evaluation of the conservation status of the genus in the country is presented. Among the species under study, patterns of disjunction or vicariance, geographic or ecological, cannot be identified. Most species are threatened with extinction; however, the genus is widely represented in protected areas.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[áreas protegidas]]></kwd>
<kwd lng="es"><![CDATA[categorías de amenaza]]></kwd>
<kwd lng="es"><![CDATA[distritos fitogeográficos]]></kwd>
<kwd lng="es"><![CDATA[formaciones vegetales]]></kwd>
<kwd lng="es"><![CDATA[riqueza de especies]]></kwd>
<kwd lng="es"><![CDATA[verdolagas]]></kwd>
<kwd lng="en"><![CDATA[phytogeographic districts]]></kwd>
<kwd lng="en"><![CDATA[plant formations]]></kwd>
<kwd lng="en"><![CDATA[protected areas]]></kwd>
<kwd lng="en"><![CDATA[purslane]]></kwd>
<kwd lng="en"><![CDATA[species richness]]></kwd>
<kwd lng="en"><![CDATA[threat categories.]]></kwd>
</kwd-group>
</article-meta>
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