<?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>0304-3584</journal-id>
<journal-title><![CDATA[Actualidades Biológicas]]></journal-title>
<abbrev-journal-title><![CDATA[Actu Biol]]></abbrev-journal-title>
<issn>0304-3584</issn>
<publisher>
<publisher-name><![CDATA[Instituto de Biología, Universidad de Antioquia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0304-35842017000200058</article-id>
<article-id pub-id-type="doi">10.17533/udea.acbi.v39n107a07</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Riparian spider communities as indicators of stream ecosystem condition in the Río Piedras watershed of Puerto Rico]]></article-title>
<article-title xml:lang="es"><![CDATA[Comunidades de arañas ribereñas como indicadores de la condición de los ecosistemas fluviales en la cuenca del Río Piedras de Puerto Rico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reyes-Maldonado]]></surname>
<given-names><![CDATA[Roberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-Ruiz]]></surname>
<given-names><![CDATA[José A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez]]></surname>
<given-names><![CDATA[Alonso]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Kelly]]></surname>
<given-names><![CDATA[Sean P.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,University of Puerto Rico Department of Biology ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Puerto Rico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,University of Puerto Rico Department of Environmental Sciences ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Puerto Rico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<volume>39</volume>
<numero>107</numero>
<fpage>58</fpage>
<lpage>65</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0304-35842017000200058&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0304-35842017000200058&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0304-35842017000200058&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Human degradation of stream ecosystems has led to the creation of a number of methods to assess the severity of such anthropogenic impacts. Biomonitoring protocols that utilize aquatic organisms, in particular macroinvertebrates, are used worldwide as a way to evaluate stream ecosystems. Despite the various benefits these methods provide, they only take into account the stream channel, ignoring altogether the condition of the riparian zone. Other methods look at physical characteristics of both the riparian area and the stream, but ignore biota. Riparian consumers such as spiders have been proposed as potential bioindicators because they could provide a more holistic alternative for assessing stream impairment. Our aim was to determine whether changes in riparian spider communities could be used as indicators to separate sites with different levels of impact along an urban gradient. We conducted correlation analyses of riparian spider community metrics (abundance and species richness) and the percent of vegetation cover in subwatersheds with varying levels of urbanization, along with three other popular stream monitoring protocols. We found a clear difference in spider community composition among subwatersheds, with an overall trend for lower richness and abundances in more impacted sites. Spider abundance correlated significantly with percent vegetation coverage and spider family richness correlated significantly with two widely employed stream monitoring protocols. These findings support the utility of riparian spider communities as indicators for disturbances of stream ecosystems in Puerto Rico and should be incorporated into future biomonitoring protocols to ensure a more holistic view of the condition of stream ecosystems.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La degradación de los sistemas ribereños, por causa de las actividades humanas, ha permitido el desarrollo de numerosos métodos que evalúan la severidad de los impactos antropogénicos. Los protocolos de biomonitoreo, empleando macroinvertebrados acuáticos, son usados mundialmente en estas evaluaciones. No obstante, estos métodos tienen la desventaja que solo evalúan el canal del río, ignorando la zona ribereña adyacente. Otros métodos consideran, en su evaluación, las características físicas de ambas zonas, pero ignoran la biota del lugar. Las arañas ribereñas se han discutido como potenciales bioindicadores dado que podrían proveer una alternativa más holística para evaluar los sistemas ribereños. Nuestro objetivo fue determinar si los cambios en las comunidades de arañas ribereñas podrían utilizarse para separar lugares con diferentes niveles de impacto. Se correlacionó el porcentaje de cobertura vegetal y diferentes protocolos de biomonitoreo, con métricas de riqueza y abundancia de arañas a lo largo de un gradiente urbano. Se encontraron diferencias en la composición de la comunidad de arañas entre lugares, con una tendencia general de menor riqueza y menor abundancia en los sitios más impactados. La abundancia de las arañas se correlacionó significativamente con el porcentaje de cobertura vegetal y la riqueza de familias se correlacionó con dos de los protocolos de monitoreo usados. Estos hallazgos respaldan la utilización de las comunidades de arañas como indicadoras de disturbio en los ecosistemas ribereños de Puerto Rico. Sugerimos incorporar las comunidades de arañas ribereñas en futuros protocolos de biomonitoreo para asegurar una visión más holística de las condiciones de los lugares evaluados.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[aquatic macroinvertebrates]]></kwd>
<kwd lng="en"><![CDATA[Araneae]]></kwd>
<kwd lng="en"><![CDATA[bioindicators]]></kwd>
<kwd lng="en"><![CDATA[biomonitoring]]></kwd>
<kwd lng="en"><![CDATA[tropical urban streams]]></kwd>
<kwd lng="es"><![CDATA[macroinvertebrados acuáticos]]></kwd>
<kwd lng="es"><![CDATA[Araneae]]></kwd>
<kwd lng="es"><![CDATA[bioindicadores]]></kwd>
<kwd lng="es"><![CDATA[biomonitoreo]]></kwd>
<kwd lng="es"><![CDATA[ríos urbanos tropicales]]></kwd>
</kwd-group>
</article-meta>
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