<?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>S2007-42982024000100068</article-id>
<article-id pub-id-type="doi">10.17129/botsci.3393</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Floral ecology of Puya ctenorhyncha (Bromeliaceae) an endemic plant of Bolivia]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Velásquez-Noriega]]></surname>
<given-names><![CDATA[Paola]]></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[Krömer]]></surname>
<given-names><![CDATA[Thorsten]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pacheco]]></surname>
<given-names><![CDATA[Luis F.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto de Ecología Herbario Nacional de Bolivia ]]></institution>
<addr-line><![CDATA[La Paz ]]></addr-line>
<country>Bolivia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Museo Nacional de Historia Natural  ]]></institution>
<addr-line><![CDATA[La Paz ]]></addr-line>
<country>Bolivia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Veracruzana Centro de Investigaciones Tropicales ]]></institution>
<addr-line><![CDATA[Xalapa Veracruz]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Instituto de Ecología Facultad de Ciencias Puras y Naturales ]]></institution>
<addr-line><![CDATA[La Paz ]]></addr-line>
<country>Bolivia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2024</year>
</pub-date>
<volume>102</volume>
<numero>1</numero>
<fpage>68</fpage>
<lpage>82</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-42982024000100068&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-42982024000100068&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-42982024000100068&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background:  The terrestrial bromeliad Puya ctenorhyncha is a near-threatened endemic species that grows between 2,500-4,050 m asl.  Hypotheses:  Hummingbirds are the most important visitors of this plant given its morphological and floral traits.  Study site:  The study was carried out along the &#8220;Death Road&#8221;, located in the Yungas montane cloud forest, La Paz, Bolivia.  Methods:  We monitored an average of 216 individuals monthly for two years (2018-2019). Besides we conducted direct observations of focal plants to quantify the visits of animals.  Results:  The reproductive season lasted from April to August in the first year and from May to June in the second. The mean nectar volume was 8.09 ± 1.59 &#956;L per flower and its composition included fructose, glucose, and 86 % of water. With 341 hours of observations, we determined that Coeligena torquata (Trochilidae) is the main visitor and putative pollinator, followed by C. violifer. Males of both species were more frequent visitors than females. Coeligena torquata showed the highest activity during the afternoon while C. violifer was more active in the morning.  Conclusions:  Floral phenology seems to be annual and unimodal. Although the main pollinators seem to be hummingbirds, the nectar concentration and composition is more similar to bromeliad species of other genera which are pollinated by bats or passerine birds. It is important to evaluate, in future studies, the dependence of both hummingbirds and their behavioural response towards the plant.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Antecedentes:  La bromelia terrestre Puya ctenorhyncha es una especie endémica casi amenazada que crece entre los 2,500-4,050 m snm.  Hipótesis:  Los colibríes son los visitantes más importantes de esta planta dadas sus características morfológicas y florales.  Sitio de estudio:  El estudio se realizó en el &#8220;Camino de la Muerte&#8221;, situado en el bosque nublado montano de los Yungas, La Paz, Bolivia.  Métodos:  Monitoreamos un promedio de 216 individuos mensuales durante dos años (2018-2019), mediante observaciones de su biología fenológica. Asimismo, realizamos observaciones directas en plantas focales para cuantificar las visitas de animales.  Resultados:  La época reproductiva duró de abril a agosto en el primer año y de mayo a junio en el segundo. El volumen medio de néctar fue de 8,09 ± 1,59 &#956;L por flor y su composición incluía fructosa, glucosa y 86 % de agua. Con 341 horas de observaciones, determinamos que Coeligena torquata (Trochilidae) es el principal visitante y polinizador putativo, seguido por C. violifer. Los machos de ambas especies fueron visitantes más frecuentes que las hembras. Coeligena torquata mostró la mayor actividad durante la tarde mientras que C. violifer fue más activa por la mañana.  Conclusiones:  La fenología floral parece ser anual y unimodal. Aunque los principales polinizadores parecen ser los colibríes, la concentración y composición del néctar es más similar a especies de bromelias de otros géneros que son polinizadas por murciélagos o aves paseriformes. Es importante evaluar, en estudios futuros, la dependencia de ambos colibríes y su respuesta de comportamiento a la planta.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Ecological interactions]]></kwd>
<kwd lng="en"><![CDATA[floral syndrome]]></kwd>
<kwd lng="en"><![CDATA[hummingbirds]]></kwd>
<kwd lng="en"><![CDATA[nectar]]></kwd>
<kwd lng="en"><![CDATA[reproductive phenology]]></kwd>
<kwd lng="en"><![CDATA[Yungas]]></kwd>
<kwd lng="es"><![CDATA[Colibríes]]></kwd>
<kwd lng="es"><![CDATA[fenología reproductiva]]></kwd>
<kwd lng="es"><![CDATA[interacciones ecológicas]]></kwd>
<kwd lng="es"><![CDATA[néctar]]></kwd>
<kwd lng="es"><![CDATA[síndrome floral]]></kwd>
<kwd lng="es"><![CDATA[Yungas]]></kwd>
</kwd-group>
</article-meta>
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