<?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>S0188-88972016000200283</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Benthic diatoms on fluvial tufas of the Mesa River, Iberian Range, Spain]]></article-title>
<article-title xml:lang="es"><![CDATA[Diatomeas bentónicas en tufas fluviales del Río Mesa, Cordillera Ibérica, España]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Beraldi-Campesi]]></surname>
<given-names><![CDATA[Hugo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arenas-Abad]]></surname>
<given-names><![CDATA[Concepcion]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Auque-Sanz]]></surname>
<given-names><![CDATA[Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vázquez-Urbez]]></surname>
<given-names><![CDATA[Marta]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pardo-Tirapu]]></surname>
<given-names><![CDATA[Gonzalo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Geología ]]></institution>
<addr-line><![CDATA[CDMX ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Zaragoza Departamento de Ciencias de la Tierra ]]></institution>
<addr-line><![CDATA[Zaragoza ]]></addr-line>
<country>Spain</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2016</year>
</pub-date>
<volume>26</volume>
<numero>2</numero>
<fpage>283</fpage>
<lpage>297</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-88972016000200283&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-88972016000200283&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-88972016000200283&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Background:  The Mesa River (MR) in the Iberian Range (Spain) displays prominent, Pleistocene to present-day fluvial tufa deposits. Little of their associated microbiota has been studied to date despite the regional and historical relevance of these calcareous buildups.  Goals:  This paper is a preliminary exploration of the diatom (Bacillariophyta) genera associated with actively-growing tufa from 10 benthic environments along 24 km of the Mesa River.  Methods: Brightfield microscopy, as well as consultation with specialists and specialized literature was used for taxonomic classification of diatoms.  Results: We identified 25 diatom genera in three different types of sedimentary facies (porous and moss-algae rich, dense-laminated, and tufa-free gravel). Most diatoms were raphid pennate (class Bacillariophyceae), while a few were centric (class Coscinodiscophyceae) or araphid pennate (class Fragilariophyceae). They appeared as integral components of the tufa structure along with cyanobacteria and other algae and mosses.  Conclusions:  Together with previous studies on the hydrochemistry and sedimentology of the MR, our interpretations suggest that HCO3-, pCO2, Ca2+, and TDIC negatively affect diatom richness and that their abundance is positively related to the presence of mosses and algae.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Antecedentes:  Del Río Mesa en la Cordillera Ibérica Española destacan sus tufas fluviales, depositadas desde Pleistoceno hasta el reciente. Poco de su microbiota bentónica ha sido estudiado a pesar de la relevancia regional de estas formaciones calcáreas.  Objetivos:  Con el objetivo de conocer los géneros de diatomeas (división Bacillariophyta) que crecen asociados a estas tufas activas, se revisaron muestras de 10 ambientes bentónicos a lo largo de 24 kilómetros del río Mesa.  Métodos: Se utilizaron técnicas de microscopia y consultas con especialistas y literatura especializada para la identificación taxonómica de las diatomeas.  Resultados:  Se identificaron 25 géneros de diatomeas en tres diferentes tipos de facies sedimentarias (porosa con musgo y algas, densa-laminada, y grava sin tufa). La mayoría de las diatomeas fueron pennadas y con rafe (clase Bacillariophyceae), y pocas fueron céntricas (clase Coscinodiscophyceae) o pennadas sin rafe (clase Fragilariophyceae). Estas aparecieron como componentes integrales de las tufas junto con cianobacterias, musgos y algas.  Conclusiones:  Estudios previos de sedimentología e hidroquímica en este río sugieren que el HCO3-, pCO2, Ca2+, y TDIC afectan negativamente a la riqueza de diatomeas, y que su abundancia esta positivamente relacionada con la presencia de musgos y algas.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Benthic diatoms]]></kwd>
<kwd lng="en"><![CDATA[freshwater tufas]]></kwd>
<kwd lng="en"><![CDATA[Iberian Range, Spain]]></kwd>
<kwd lng="es"><![CDATA[Cordillera Ibérica]]></kwd>
<kwd lng="es"><![CDATA[diatomeas bentónicas]]></kwd>
<kwd lng="es"><![CDATA[España]]></kwd>
<kwd lng="es"><![CDATA[tobas fluviales]]></kwd>
</kwd-group>
</article-meta>
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