<?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>0370-3908</journal-id>
<journal-title><![CDATA[Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. acad. colomb. cienc. exact. fis. nat.]]></abbrev-journal-title>
<issn>0370-3908</issn>
<publisher>
<publisher-name><![CDATA[Academia Colombiana de Ciencias Exactas, Físicas y Naturales]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0370-39082023000400889</article-id>
<article-id pub-id-type="doi">10.18257/raccefyn.1968</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Analysis of the distribution and abundance of two species of cat's claw (Uncaria sp.) based on the knowledge of Tikuna indigenous communities in the southern Colombian Amazon]]></article-title>
<article-title xml:lang="es"><![CDATA[Análisis de la distribución y abundancia de dos especies de uña de gato (Uncaria sp.) con base en el conocimiento de comunidades indígenas Tikuna del sur de la Amazonia colombiana]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Garzón]]></surname>
<given-names><![CDATA[Lina Paola]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional de Colombia  ]]></institution>
<addr-line><![CDATA[Leticia ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<volume>47</volume>
<numero>185</numero>
<fpage>889</fpage>
<lpage>901</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0370-39082023000400889&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0370-39082023000400889&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0370-39082023000400889&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Uncaria guianensis (Aublet) J.F. Gmel and U. tomentosa (Willd. ex Roemer &amp; Schultes) D.C., commonly known as cat's claw, are species with medicinal and commercial value in the Amazon region. Given the intensive extraction of forest resources for commercialization in the region, the distribution and abundance of these species there should be determined. So far, the environmental and edaphic conditions influencing Uncaria tomentosa growth and density are better known than those of U. guianensis. Besides, cat's claw species distribution in the Colombian Amazon has not been sufficiently studied. In this context, the present study was conducted in two indigenous Tikuna communities together with local experts to make the botanical identification of the two Uncaria species. Visits were made to register the landscapes and soils where these plants grow. We found that U. guianensis has a higher distribution and abundance in the southern Colombian Amazon than U. tomentosa. Both species grow in flooded alluvial areas with Entisol-type soils and dryland Oxisol-type soils. U. tomentosa grows especially in primary and secondary forest Oxisol soils on drylands. Our findings suggest that none of these two species have a homogeneous distribution in the region, which explains why their use varies from one area to the other.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Uncaria guianensis (Aublet) J.F. Gmel y U. tomentosa (Willd. ex Roemer &amp; Schultes) D.C., conocidas popularmente con el nombre de uña de gato, son especies con valor medicinal y comercial en la región amazónica. Dado que este recurso se extrae del medio natural para su comercialización, es importante determinar su distribución y abundancia en la región. Hay más información sobre las condiciones ambientales y edáficas que influyen en el crecimiento y densidad de U. tomentosa que de U. guianensis y, en general, el conocimiento sobre su distribución es limitado. En ese contexto, conjuntamente con conocedores locales de dos comunidades indígenas Tikuna, se hizo la identificación botánica de las dos especies, así como recorridos para reconocer los paisajes y suelos donde crecen. Se encontró que U. guianensis tiene una distribución más amplia y mayor abundancia en el sur de la Amazonia colombiana que U. tomentosa, ya que crece tanto en áreas inundables aluviales con suelos de tipo Entisol, como en zonas de tierra firme con suelos de tipo Oxisol. U. tomentosa crece solo en tierra firme, en suelos de tipo Oxisol de bosque primario y secundario. Los resultados sugieren que no existe una distribución homogénea de las dos especies en la Amazonia, lo que explica que una de las dos especies sea más usada en ciertas zonas que en otras.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Ethnoecology]]></kwd>
<kwd lng="en"><![CDATA[Indigenous knowledge]]></kwd>
<kwd lng="en"><![CDATA[Amazon soils]]></kwd>
<kwd lng="en"><![CDATA[Cat's claw]]></kwd>
<kwd lng="es"><![CDATA[Etnoecología]]></kwd>
<kwd lng="es"><![CDATA[Conocimiento indígena]]></kwd>
<kwd lng="es"><![CDATA[Suelos amazónicos]]></kwd>
<kwd lng="es"><![CDATA[Uña de gato]]></kwd>
</kwd-group>
</article-meta>
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