<?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>0188-8897</journal-id>
<journal-title><![CDATA[Hidrobiológica]]></journal-title>
<abbrev-journal-title><![CDATA[Hidrobiológica]]></abbrev-journal-title>
<issn>0188-8897</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma Metropolitana, División de Ciencias Biológicas y de la Salud]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-88972016000300373</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Effects of agricultural water withdrawal in the fluvial habitat of benthic macroinvertebrates in Chile]]></article-title>
<article-title xml:lang="es"><![CDATA[Efectos de la extracción agrícola del agua en el hábitat fluvial de macroinvertebrados bentónicos en Chile]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guevara-Mora]]></surname>
<given-names><![CDATA[Meyer]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pedreros]]></surname>
<given-names><![CDATA[Pablo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Urrutia]]></surname>
<given-names><![CDATA[Roberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Figueroa]]></surname>
<given-names><![CDATA[Ricardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Concepción Centro de Ciencias Ambientales EULA-Chile ]]></institution>
<addr-line><![CDATA[Concepción ]]></addr-line>
<country>Chile</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Concepción Centro de Ciencias Ambientales EULA-Chile ]]></institution>
<addr-line><![CDATA[Concepción ]]></addr-line>
<country>Chile</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<volume>26</volume>
<numero>3</numero>
<fpage>373</fpage>
<lpage>382</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-88972016000300373&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-88972016000300373&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-88972016000300373&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background. The climatic and geographic characteristics of Central Chile allow the concentration of high water demand from agricultural activities in low order rivers. Changes in the hydrologic regime of these rivers should affect the habitat availability of endemic benthic macroinvertebrates. However, the impact of water diversion in the Chilean rivers is poorly understood.  Goals. We want to determine the effects of water abstraction in the habitat of benthic macroinvertebrates with biotic indices.  Methods. We sampled nutrients, macroinvertebrates, and morphological characteristics of three rivers affected by agricultural water extractions in the Itata basin (Chile). We assess the habitat alteration and benthic macroinvertebrate assemblage through the measurement of depth, current velocity, Froude number, wetted width/depth ratio, dissolved oxygen, and biotic indices.  Results. Traditional methods of constructing the weirs affect the water level in the sampling sites. Most of the habitat parameters shows variation between the control and impact sampling sections, but only Shannon and Simpson diversity indices were statistical different.  Conclusions. The increase in taxonomical resolution of benthic macroinvertebrates in the Mediterranean zone of Chile could improve detection of environmental impacts of water extraction. We suggest the use of biological traits in order to determine specific relationships between water withdrawals and environmental changes in low order rivers of Chile affected by water extraction.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes. Las características climáticas y geográficas de Chile Central permiten la concentración de alta demanda de agua para las actividades agrícolas en los ríos de bajo orden. Los cambios en el régimen hidrológico de estos ríos podrían afectar la disponibilidad de hábitat para las especies endémicas de macroinvertebrados bentónicos. Sin embargo, el impacto de la extracción del agua en ríos de Chile ha sido poco estudiado en esta área.  Objetivos. Se determinaron los efectos de la extracción del agua en el hábitat de los macroinvertebrados bentónicos mediante índices bióticos.  Métodos. Se colectaron muestras de nutrientes y de las características morfológicas de 3 ríos afectados por las extracciones de agua en la cuenca del Itata, Chile para establecer el efecto en los ensambles de macroinvertebrados bentónicos. Evaluamos la alteración del hábitat y los cambios en la comunidad de macroinvertebrados bentónicos a través de la medición de la profundidad, velocidad de la corriente, número de Froude, ancho del río/profundidad, oxígeno disuelto, índices bióticos y de diversidad.  Resultados. Los métodos tradicionales para la construcción de las estructuras de derivación de caudal afectaron el nivel del agua en los sitios de muestreo. La mayoría de los parámetros relacionados con el hábitat variaron entre los puntos de control e impacto, pero únicamente los índices de Shannon y Simpson mostraron diferencias estadísticamente significativas.  Conclusiones. El aumento en la resolución taxonómica para la determinación de los macroinvertebrados bentónicos de la zona mediterránea de Chile podría favorecer la detección de los impactos ambientales asociados a la extracción de agua. Sugerimos el uso de rasgos biológicos para poder establecer relaciones específicas entre las extracciones de agua y los cambios ambientales en los ríos de orden bajo de Chile.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Agriculture]]></kwd>
<kwd lng="en"><![CDATA[aquatic insects]]></kwd>
<kwd lng="en"><![CDATA[flow]]></kwd>
<kwd lng="en"><![CDATA[stream disturbance]]></kwd>
<kwd lng="en"><![CDATA[water extractions]]></kwd>
<kwd lng="es"><![CDATA[Agricultura]]></kwd>
<kwd lng="es"><![CDATA[caudal]]></kwd>
<kwd lng="es"><![CDATA[extracción de agua]]></kwd>
<kwd lng="es"><![CDATA[insectos acuáticos]]></kwd>
<kwd lng="es"><![CDATA[perturbaciones en ríos]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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<year>2006</year>
<volume>22</volume>
<numero>7</numero>
<issue>7</issue>
<page-range>819-36</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
