<?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>0034-7744</journal-id>
<journal-title><![CDATA[Revista de Biología Tropical]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. biol. trop]]></abbrev-journal-title>
<issn>0034-7744</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0034-77442015000300647</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Interaction networks and the use of floral resources by male orchid bees (Hymenoptera: Apidae: Euglossini) in a primary rain forests of the Chocó Region (Colombia)]]></article-title>
<article-title xml:lang="es"><![CDATA[Redes de interacciones y uso de recursos florales por abejas macho de orquídeas (Hymenoptera: Apidae: Euglossini) en un bosque primario de la región del Chocó (Colombia)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ospina-Torres]]></surname>
<given-names><![CDATA[Rodulfo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Montoya-Pfeiffer]]></surname>
<given-names><![CDATA[Paula María]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Parra-H.]]></surname>
<given-names><![CDATA[Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Solarte]]></surname>
<given-names><![CDATA[Víctor]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Otero]]></surname>
<given-names><![CDATA[Joel Tupac]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,rospinat@unal.edu.co, pmmontoyap@unal.edu.co, vmsolartec@unal.edu.co  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="Af2">
<institution><![CDATA[,varnishpt@gmail.com  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="Af3">
<institution><![CDATA[,jtoteroo@unal.edu.co  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="Af4">
<institution><![CDATA[,idea_pal@unal.edu.co  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2015</year>
</pub-date>
<volume>63</volume>
<numero>3</numero>
<fpage>647</fpage>
<lpage>658</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0034-77442015000300647&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0034-77442015000300647&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0034-77442015000300647&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Orchid bees are important keystone pollinators from the Neotropics. With the aim to study the relationships between orchid bees and their nectar and aromatic host species, we made systematic samplings of males across two conservation areas in the biogeographic Chocó Region of Colombia. We used chemical baits to collect 352 male bees during five months. The pollen attached to their bodies was extracted for palynological identification and to estimate interaction networks. The euglossine community consisted of at least 22 species including Eg. maculilabris, Eg. orellana, Eg. championiand Eg. ignita.The male bees were associated with 84 plants but depended on a small group of them (Peperomiaspp. and Anthuriumspp, as well as species of Solanaceae, Ericaceae and Malpighiaceae) which were widely distributed across the altitudinal gradient, and were available through the year. The resulting interaction networks revealed a typical nested pattern usually found in plant-pollinator interactions, with several rare bee and plant species interaction with a small group of generalist bees and plant species. Albeit, we found variation within networks related to species composition. Such variation may be a consequence of specific differences in plant flowering phenology.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Las abejas de las orquídeas son uno de los principales grupos de polinizadores con distribución exclusivamente Neotropical. Con el fin de documentar las relaciones de estas abejas con sus plantas fuente de néctar y sustancias aromáticas, realizamos muestreos sistemáticos de 352 machos durante cinco meses usando cebos químicos para atraerlos en dos áreas de conservación en el Chocó biogeográfico. Se extrajo el polen adherido al cuerpo de los especímenes recolectados para identificación palinológica de las especies vegetales visitadas por la comunidad y posterior análisis de redes de interacciones. Encontramos que la comunidad de euglossinos está conformada por al menos 22 especies de abejas. Dentro de la comunidad fueron más comunes: Eg. maculilabris, Eg. orellana, Eg. championiy Eg. ignita.Las especies de abejas se relacionan con no menos de 84 especies de plantas pero dependen más frecuentemente de un pequeño grupo de especies vegetales ampliamente distribuidas en el gradiente altitudinal mues-treado y que se encuentran disponibles durante gran parte del año. Dentro de este pequeño grupo destacan especies pertenecientes a los géneros Anthuriumy Peperomiay a las familias Solanaceae, Ericaceae y Malpighiaceae. Las redes de interacciones resultantes muestran un patrón anidado en el que muchas especies de abejas o plantas raras interac-túan con un pequeño grupo de especies de abejas o plantas generalistas. También encontramos variaciones espaciales y temporales en las redes en cuanto a la composición de especies y la manera como se distribuyen las interacciones. Estas variaciones estarían determinadas por las diferencias en la fenología de las plantas y en las condiciones climáticas entre los sitios muestreados que se encuentran muy cercanos entre sí.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[community ecology]]></kwd>
<kwd lng="en"><![CDATA[plant-insect relationships]]></kwd>
<kwd lng="en"><![CDATA[Rio Ñambí Natural Reserve]]></kwd>
<kwd lng="en"><![CDATA[pollinators]]></kwd>
<kwd lng="en"><![CDATA[interaction networks]]></kwd>
<kwd lng="en"><![CDATA[mutualisms.]]></kwd>
<kwd lng="es"><![CDATA[polinizadores]]></kwd>
<kwd lng="es"><![CDATA[redes de interacciones]]></kwd>
<kwd lng="es"><![CDATA[relación planta-insecto]]></kwd>
<kwd lng="es"><![CDATA[Reserva Natural del Río Ñambí]]></kwd>
</kwd-group>
</article-meta>
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