<?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>S0188-88972017000300327</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Ecología de cianoprocariontes epífitas que habitan ambientes lóticos de la Cantera Oriente, Ciudad de México]]></article-title>
<article-title xml:lang="en"><![CDATA[Ecology of epiphytic cyanoprokaryotes inhabiting lotic environments in Cantera Oriente, Mexico City]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Maceda]]></surname>
<given-names><![CDATA[Roxana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tavera]]></surname>
<given-names><![CDATA[Rosa Luz]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Novelo]]></surname>
<given-names><![CDATA[Eberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Ciencias ]]></institution>
<addr-line><![CDATA[CDMX ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Ciencias Departamento de Ecología y Recursos Naturales]]></institution>
<addr-line><![CDATA[CDMX ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Ciencias Departamento de Biología Comparada]]></institution>
<addr-line><![CDATA[CDMX ]]></addr-line>
<country>Mexico</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>27</volume>
<numero>3</numero>
<fpage>327</fpage>
<lpage>336</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-88972017000300327&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-88972017000300327&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-88972017000300327&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes:  La Cantera Oriente alberga un componente de microalgas diverso. Los ecosistemas lénticos han recibido mucha más atención que los sistemas lóticos, lo que hace importante su estudio.  Objetivos:  Comparar comunidades de cianoprocariontes de un ambiente lótico natural y otro artificial, midiendo la densidad y frecuencia relativas de las especies y su asociación con factores ambientales.  Métodos:  Se muestrearon mensualmente las clorofitas filamentosas y la madera y raíces de plantas sumergidas en dos ambientes lóticos (uno natural y otro artificial) de septiembre de 2012 a septiembre de 2013, para estudiar las cianoprocariontes epífitas presentes en ellos. Simultáneamente, se obtuvieron datos fisicoquímicos con mediciones de campo y análisis de laboratorio. Las especies se evaluaron de acuerdo con el Índice de Valor de Importancia (IVI).  Resultados:  Sólo el 31 % de las cianoprocariontes fue compartido por ambos sitios.Los datos fisicoquímicos mostraron igualdad de varianzas y no se correlacionaron con los valores del IVI, denotando un bajo nivel de disturbio ambiental. La comparación estadística proporcional del IVI observado y teórico de las especies de cada ambiente (prueba Chi cuadrada), estableció que las cianoprocariontes se asociaron con el tipo deambiente, el tipo de sustrato y la estación climática.  Conclusiones:  Los ambientes lóticos de la Cantera Oriente se caracterizan por un bajo nivel de disturbio, que no afecta la presencia ni la biomasa de las cianoprocariontes. El IVI se asocia con el tipo de ambiente y de sustrato como sitio de colonización y parece explicar las preferencias de hábitat para algunas especies.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background: Cantera Oriente houses a diverse microalgal component. The lentic ecosystems have received much grea ter attention than the lotic systems, which makes their study important.  Goals:  Compare cyanoprokaryotic communities found in a natural and an artificial lotic environment. To measure the relative density and frequency of species and to mea sure their association with environmental factors.  Methods:  Filamentous chlorophytes, wood, and roots of submerged plants were sampled once a month in two lotic environments (natural and artificial) from September 2012 to September 2013, to study the epiphytic cyanoprokaryotes. Simultaneously, physical and chemical data were obtained with field mea surements and laboratory analysis. Species were evaluated according to the Importance Value Index (IVI).  Results:  Only 31% of cyanoprokaryotes were shared by both sites. The chemical and physical data showed equal variances and were not correlated with IVI values, denoting a low level of environmental disturbance. The proportional statistical comparison of the observed and theoretical IVI of the species of each environment, (Chi square), established that the cyanoprokaryo tes were associated with the type of environment, the type of substrate, and the climatic season.  Conclusions:  The lotic environments in Cantera Oriente are characterized by a low level of disturbance, which does not affect the presence or biomass of the cyanoprokaryotes and the Importance Value Index is associated with the type of environment and substra te as a site of colonization, which seems to explain the habitat preferences of some species.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Algas bentónicas]]></kwd>
<kwd lng="es"><![CDATA[arroyos]]></kwd>
<kwd lng="es"><![CDATA[canales]]></kwd>
<kwd lng="es"><![CDATA[disturbio]]></kwd>
<kwd lng="es"><![CDATA[perifiton]]></kwd>
<kwd lng="en"><![CDATA[Benthic algae]]></kwd>
<kwd lng="en"><![CDATA[channels]]></kwd>
<kwd lng="en"><![CDATA[disturbance]]></kwd>
<kwd lng="en"><![CDATA[periphyton]]></kwd>
<kwd lng="en"><![CDATA[streams]]></kwd>
</kwd-group>
</article-meta>
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