<?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>1659-4266</journal-id>
<journal-title><![CDATA[Cuadernos de Investigación UNED]]></journal-title>
<abbrev-journal-title><![CDATA[Cuadernos de Investigación UNED]]></abbrev-journal-title>
<issn>1659-4266</issn>
<publisher>
<publisher-name><![CDATA[Universidad Estatal a Distancia de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1659-42662023000100040</article-id>
<article-id pub-id-type="doi">10.22458/urj.v15i1.4368</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efecto del tamaño de trampa al cuantificar la caída de material vegetal]]></article-title>
<article-title xml:lang="en"><![CDATA[Effect of trap size when quantifying plant material fall]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quesada-Acuña]]></surname>
<given-names><![CDATA[Sergio Gabriel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gómez]]></surname>
<given-names><![CDATA[Gabriela Pérez]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Estatal a Distancia Vicerrectoría de Investigación Laboratorio de Ecología Urbana]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Estatal a Distancia Vicerrectoría de Investigación Laboratorio de Vida Silvestre y Salud]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2023</year>
</pub-date>
<volume>15</volume>
<numero>1</numero>
<fpage>40</fpage>
<lpage>48</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S1659-42662023000100040&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S1659-42662023000100040&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S1659-42662023000100040&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Introducción: Muchos fenómenos naturales estudiados en ecología (como lluvia de semillas y producción de hojarasca) requieren métodos cuantitativos que recolecten datos in absentia, por ejemplo, las trampas. Las trampas varían en forma, tamaño y material, y se debe considerar cuidadosamente su selección. Hay pocos estudios que comparen el desempeño de trampas de diferentes tamaños y su efecto en las estimaciones. Objetivo: Comparar dos tamaños de una trampa común diseñada para cuantificar la caída de material vegetal. Métodos: En un parque urbano tropical en San José, Costa Rica, colocamos un total de 74 trampas cuadradas (trampa grande = 0,50m2, con una subsección concéntrica de 0,25m2 que representa la trampa pequeña) en tres microhábitats (pasto; borde del bosque y bajo árboles aislados). Desde julio de 2021 hasta junio de 2022, recolectamos el contenido de las trampas dos veces al mes (esfuerzo de muestreo anual: 144 horas por trampa). Resultados: la trampa grande da como resultado estimaciones de densidad más bajas, lo que genera errores y desviaciones estándar más altos. La trampa pequeña estima densidades más altas, pero reduce la desviación estándar y el error. Los coeficientes de variación de ambas trampas fueron similares. Conclusión: Los estudios con trampas de vegetación deben considerar el efecto del tamaño de trampa en las estimaciones de densidad, el error estimado y las desviaciones estándar.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Introduction: Many natural phenomena studied by ecologists (e.g. seed rain, litter production) require quantitative methods that collect data in the absence of the researcher, favoring for example traps. Traps vary in shape, size, and material, and their selection should be carefully considered. There are few studies that compare the performance of traps of different sizes and their effect on estimates. Objective: To compare two sizes of a common trap designed to quantify the fall of plant material. Methods: In a tropical urban park in San José, Costa Rica, we placed a total of 74 square traps (large trap= 0,50m2, with a concentric 0,25m2 subsection representing the small trap) in three microhabitats (grass; forest edge and under isolated trees). From July 2021 to June 2022 we collected the tramp contents twice a month (annual sampling effort: 144 hours per trap). Results: The large trap results in lower density estimates, leading to higher errors and standard deviations. The small trap estimates higher densities but reduces the standard deviation and error. The coefficients of variation of both traps were similar. Conclusion: Vegetation trap studies must consider the effect of trap size on density estimates, error estimates and standard deviations.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Dispersion]]></kwd>
<kwd lng="en"><![CDATA[natural regeneration]]></kwd>
<kwd lng="en"><![CDATA[seed rain]]></kwd>
<kwd lng="en"><![CDATA[seed trap]]></kwd>
<kwd lng="en"><![CDATA[trap size]]></kwd>
<kwd lng="en"><![CDATA[urban park.]]></kwd>
<kwd lng="es"><![CDATA[Dispersión]]></kwd>
<kwd lng="es"><![CDATA[lluvia de semillas]]></kwd>
<kwd lng="es"><![CDATA[parque urbano]]></kwd>
<kwd lng="es"><![CDATA[regeneración natural]]></kwd>
<kwd lng="es"><![CDATA[tamaño de trampa]]></kwd>
<kwd lng="es"><![CDATA[trampa de semillas.]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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