<?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>S0034-77442021000100331</article-id>
<article-id pub-id-type="doi">10.15517/rbt.v69i1.42042</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Ecología funcional de las algas perifíticas en el Chocó colombiano: limitación de recursos, competencia y variables ambientales]]></article-title>
<article-title xml:lang="en"><![CDATA[Functional ecology of periphytic algae in the Colombian Chocó: resource limitations, competition, and environmental variables]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lizarazo]]></surname>
<given-names><![CDATA[Mayra Camila Guerrero]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pinilla-Agudelo]]></surname>
<given-names><![CDATA[Gabriel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Galindo]]></surname>
<given-names><![CDATA[Ingrid Julieth Estrada]]></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[ Bogotá]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2021</year>
</pub-date>
<volume>69</volume>
<numero>1</numero>
<fpage>331</fpage>
<lpage>351</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0034-77442021000100331&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0034-77442021000100331&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0034-77442021000100331&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción:  El conocimiento de las comunidades perifíticas es importante, dada su participación en la producción primaria de los ambientes fluviales; además, el perifiton es una valiosa comunidad bioindicadora. No obstante, hasta la fecha es poco lo que se conoce sobre la ecología funcional de esta comunidad en los ríos colombianos.  Objetivo: En este trabajo se buscó caracterizar algunos aspectos funcionales de la comunidad de ficoperifiton de cuatro sistemas lóticos de la Reserva Natural La Planada, ubicada en el departamento de Nariño, Colombia.  Métodos:  Durante mayo de 2019, en cada río se establecieron entre uno y tres sitios de muestreo, en los cuales se midieron las características hidrológicas y fisicoquímicas y se determinó la composición taxonómica y algunos rasgos funcionales de las comunidades de algas perifíticas. Se calcularon la media ponderada comunitaria (MPC) y la varianza ponderada comunitaria (VPC) de estos rasgos y se exploró su relación con las variables abióticas mediante regresiones, correlaciones y análisis de correspondencia canónica (ACC).  Resultados:  Se registraron 59 géneros de algas, de los cuales a 47 se les midieron los rasgos funcionales. La MPC del rasgo exoesqueleto silíceo fue estadísticamente mayor en la quebrada El Tejón. La MPC y la VPC de los demás rasgos no varió entre ríos, pero en algunos de ellos la presencia de mucílago y la organización en filamentos tendió a ser mayor. La amplia fluctuación de la VPC de todos los rasgos funcionales parece señalar que estas comunidades ficoperifíticas no tienen limitaciones de recursos, la competencia es reducida y las especies tienden a ser funcionalmente diferentes. Las variables ambientales con mayor influencia fueron el caudal, la mineralización del agua, el pH y la transparencia. La presencia de mucílago se asoció con la dureza del agua y el predominio de algas filamentosas con la transparencia; el pH influyó positivamente la relación superficie/volumen (S/V).  Conclusiones:  Este estudio constituye una línea base que permitirá evaluar cambios en las comunidades de algas bentónicas ante posibles intervenciones y brindar pautas para eventuales acciones de restauración de los sistemas fluviales de esta región de importancia mundial por su elevada biodiversidad.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction:  Knowledge on the periphytic community is essential because of its central role in river primary production. Also, periphyton is a valuable bioindicator of the community. However, to the date, little is known about the functional ecology of these communities in Colombian rivers.  Objective:  This work sought to characterize functional aspects of the phycoperiphytic community of four lotic systems of the La Planada Natural Reserve, located in the Department of Nariño, Colombia.  Methods:  In May 2019, between one and three sampling sites were established in each river. Hydrological and physicochemical variables were measured. Periphyton was sample to determine the taxonomic composition of the benthic algae as well as some functional traits. From these traits, the community weighted mean (CWM) and community weighted variance (CWV) were calculated, and their relation with abiotic variables was explored using regressions, correlations, and a canonical correspondence analysis (CCA).  Results:  59 genera of algae were recorded, from which 47 had its functional traits measured. The CWM of the siliceous exoskeleton trait was statistically higher in El Tejón creek. The other traits had similar CWM and CWV values in all rivers. However, the traits of the presence of mucilage and organization in filaments showed predominance in some streams. The fluctuating data of CWV in all rivers seem to indicate that these phycoperiphytic communities have no resource limitations, competition is low, and species tend to be functionally different. The environmental variables with the greatest influence were flow, water mineralization, pH, and water transparency. The hardness of the water and the presence of mucilage were associated, while the predominance of filamentous algae was related to transparency; pH positively influenced the surface/volume ratio (S/V).  Conclusions:  This study represents a baseline that will allow evaluating changes in the benthic algae communities in the face of possible interventions and providing guidelines for eventual actions to restore the river systems of this important region due to its high biodiversity.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[benthic microalgae]]></kwd>
<kwd lng="en"><![CDATA[community weighted mean]]></kwd>
<kwd lng="en"><![CDATA[community weighted variance]]></kwd>
<kwd lng="en"><![CDATA[functional trait]]></kwd>
<kwd lng="en"><![CDATA[La Planada]]></kwd>
<kwd lng="en"><![CDATA[phycoperiphyton]]></kwd>
<kwd lng="es"><![CDATA[ficoperifíton]]></kwd>
<kwd lng="es"><![CDATA[la Planada]]></kwd>
<kwd lng="es"><![CDATA[media ponderada de la comunidad]]></kwd>
<kwd lng="es"><![CDATA[microalgas bentónicas]]></kwd>
<kwd lng="es"><![CDATA[rasgo funcional]]></kwd>
<kwd lng="es"><![CDATA[varianza ponderada de la comunidad]]></kwd>
</kwd-group>
</article-meta>
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