<?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>S0188-88972022000300245</article-id>
<article-id pub-id-type="doi">10.24275/uam/izt/dcbs/hidro/2022v32n3/siqueiros</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Diversity measurement of benthic diatom taxocoenoses based on information theory (H&#8217;) using genus-to-species ratio]]></article-title>
<article-title xml:lang="es"><![CDATA[Mediciones de diversidad en taxocenosis de diatomeas bentónicas con base en la teoría de la información (H&#8217;) utilizando la razón género-especie]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Siqueiros-Beltrones]]></surname>
<given-names><![CDATA[David Alfaro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández Almeida]]></surname>
<given-names><![CDATA[Oscar Ubisha]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Politécnico Nacional Centro Interdisciplinario de Ciencias Marinas Departamento de Plancton y Ecología Marina]]></institution>
<addr-line><![CDATA[La Paz Baja California Sur]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma de Nayarit Laboratorio de Oceanografía Biológica ]]></institution>
<addr-line><![CDATA[Tepic Nayarit]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<volume>32</volume>
<numero>3</numero>
<fpage>245</fpage>
<lpage>249</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-88972022000300245&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-88972022000300245&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-88972022000300245&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background.  Within any given taxocenosis of benthic diatoms (BDT), the distribution of the taxa relative abundances renders them as very abundant, common, uncommon, and rare taxa. This structure is considered when estimating species diversity using Shannon&#8217;s index (H&#8217;) based on information theory. Thus, because this distribution also occurs within the taxonomic hierarchy of BDT, i.e., genera with a high number of species-infraspecies (SS) or species singletons, estimating species diversity (H&#8217;) using the genus/SS ratio instead of relative abundances, represents an alternative measure of diversity but resorting to a much smaller data matrix. Hence, the diversity index designated H&#8217;G/SS is proposed here.  Objective.  In this essay, we sought to gather evidence that combining information on the genus-level taxa and their included SS provides a reliable estimation of taxonomic diversity for BDT. Hence, we tested the hypothesis that the estimated H&#8217;G/SS for the floristic of BDT in a particular locality would be as high as the highest value using diatom relative abundances.  Method.  To test the above, floristic and species diversity (H&#8217;) data from several studies of BDT along Mexican shores were analyzed quantitatively under the premise that diversity estimates based on relative abundances of species (H&#8217;) or the H&#8217;G/SS index would be equivalent.  Results.  Statistical tests supported our hypothesis showing no significant differences between the original values of H&#8217; and those using H&#8217;G/SS.  Conclusions.  This diversity estimation using H&#8217;G/SS for BDT represents a reliable, quicker, and more comprehensive approach and another parameter that can be used for further conservationist, ecological, and biogeographical purposes.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes.  En cualquier taxocenosis de diatomeas bentónicas (TDB), según la distribución de sus abundancias relativas, los taxa se clasifican como muy abundantes, abundantes, comunes, poco comunes, y raros. Esta estructura es la base del cálculo de diversidad de especies mediante el índice de diversidad de Shannon (H&#8217;) con base en la teoría de la información. Así, dado que dicha distribución ocurre igualmente dentro de la jerarquía taxonómica de TDB, i.e., géneros con muy abundantes o abundantes especies o infraespecies (SS), o que contienen una sola SS, el estimar (H&#8217;) mediante la razón género/SS en vez de abundancias relativas, representa una medida alternativa de diversidad, empero recurriendo a una matriz de datos mucho más pequeña. De acuerdo con esto, se propone aquí el índice de diversidad designado H&#8217;G/SS.  Objetivo.  En este ensayo se buscó reunir evidencias de que la combinación de información a nivel de género y las SS que incluyen, proporciona una estimación confiable de diversidad taxonómica para TDB. Así, se contrastó la hipótesis de que los valores calculados de H&#8217;G/SS para la florística de TDB en una localidad en particular serían tan altos como el valor máximo calculado utilizando las abundancias relativas.  Método.  Para contrastar la hipótesis se analizaron cuantitativamente datos floristicos y de diversidad de especies (H&#8217;) de diversos estudios de TDB conducidos en litorales Mexicanos, bajo la premisa de que los cálculos de diversidad hechos, tanto con abundancias relativas (H&#8217;) o con el índice H&#8217;G/SS serían equivalentes.  Resultados.  Las pruebas estadísticas apoyan nuestra hipótesis mostrando que no había diferencias significativas entre los valores originales de H&#8217; y los de H&#8217;G/SS.  Conclusiones.  Esta forma de estimar diversidad en TDB representa una aproximación confiable, más rápida y comprensiva, así como un parámetro adicional para ser utilizado con fines de conservación, ecológicos y biogeográficos.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Diversity estimate]]></kwd>
<kwd lng="en"><![CDATA[Ecological indices]]></kwd>
<kwd lng="en"><![CDATA[Ecological parameters]]></kwd>
<kwd lng="en"><![CDATA[Floristics]]></kwd>
<kwd lng="en"><![CDATA[H&#8217;]]></kwd>
<kwd lng="es"><![CDATA[Florística]]></kwd>
<kwd lng="es"><![CDATA[H&#8217;, Índices ecológicos]]></kwd>
<kwd lng="es"><![CDATA[Medición de diversidad]]></kwd>
<kwd lng="es"><![CDATA[Parámetros ecológicos]]></kwd>
</kwd-group>
</article-meta>
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<article-title xml:lang=""><![CDATA[Diversity, biotic and similarity indices]]></article-title>
<source><![CDATA[Water Research]]></source>
<year>1984</year>
<volume>18</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>653-94</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
