<?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>2007-4298</journal-id>
<journal-title><![CDATA[Botanical Sciences]]></journal-title>
<abbrev-journal-title><![CDATA[Bot. sci]]></abbrev-journal-title>
<issn>2007-4298</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Botánica de México A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-42982016000300499</article-id>
<article-id pub-id-type="doi">10.17129/botsci.584</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[An analysis of vegetation and species diversity patterns in sand dune and gravel desert ecosystem]]></article-title>
<article-title xml:lang="es"><![CDATA[Un análisis de la vegetación y de los patrones de vegetación en los ecosistemas de dunas de arena y desierto de grava]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Abdi]]></surname>
<given-names><![CDATA[Mahsa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Afsharzadeh]]></surname>
<given-names><![CDATA[Saeed]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,University of Isfahan Faculty of Science Department of Biology]]></institution>
<addr-line><![CDATA[ Isfahan]]></addr-line>
<country>Iran</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2016</year>
</pub-date>
<volume>94</volume>
<numero>3</numero>
<fpage>499</fpage>
<lpage>511</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-42982016000300499&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-42982016000300499&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-42982016000300499&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: This study provides an analysis of vegetation and environmental relationships as well as diversity patterns in sand dunes and gravel desert plains of northern Badrud, Iran. A total of 63 species representing 49 genera and 15 families were recorded. The largest families were Asteraceae (22.2 %) and Chenopodiaceae (19.0 %). Therophytes (66.67 %) were the dominant life form. Chronological analysis showed 57.14 % Irano-Turani elements. Data from 60 1.5 × 2 m2 quadrats, selected systematically randomized along three transects, were collected. Both two-way indicator species analysis (TWINSPAN) and cluster analysis using Ward&#8217;s method resulted in the recognition of three communities: an Artemisia sieberi community in the center plain with a Shannon-Wiener diversity index of 0.3, a Stipagrostis plumosa - Schismus arabicus community on the lower sand dunes with a Shannon-Wiener diversity index of 0.7, and a Haloxylon ammodendron community on the higher sand dunes with a Shannon-Wiener diversity index of 0.2. Detrended correspondence analysis (DCA), non-metric multidimensional scaling (NMDS), and multi-response permutation procedure (MRPP), confirmed the separation of TWINSPAN groups as well as the heterogeneity of the Artemisia sieberi - Schismus arabicus community, suggesting a distinct group with Artemisia sieberi and Schismus arabicus as the dominant species. Vegetation environmental analysis by means of multivariate techniques of principal component analysis (PCA) and canonical correspondence analysis (CCA) indicated that very coarse gravel has a strong negative effect on diversity and a negative effect on species cover percentage. Bare ground showed a highly positive effect on diversity variables. Soil analysis suggests final seral stages of succession towards severe desertification.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Este estudio proporciona un análisis de las relaciones de la vegetación y el medio ambiente, así como los patrones de diversidad en las dunas de arena y llanuras de grava del desierto del norte Badrud, Irán. Se registró un total de 63 especies que representan 49 géneros y 15 familias. Las familias más importantes fueron Asteraceae (22,2 %) y Chenopodiaceae (19,0 %). Las terófitas (66,67 %) fueron la forma de vida dominante. Los análisis cronológico mostró un 57,14 % de elementos irano-Turani. Se recogieron datos de 60 cuadrantes de 1,5 × 2 m2 seleccionados al azar de forma sistemática a lo largo de 3 transectos. Tanto el análisis de especies indicadoras de dos vías (TWINSPAN) y análisis de conglomerados, utilizando el método de Ward arrojaron como resultado el reconocimiento de tres comunidades: la comunidad de Artemisia sieberi en el centro de la parte llana de la región con Shannon-Wiener con índice de diversidad de 0.3, la comunidad Stipagrostis plumosa - Schismus arabicus en las dunas de arena más bajas con Shannon-Wiener con índice de diversidad de 0,7 y la comunidad de Haloxylon ammodendron en las dunas de arena más altas con Shannon -Wiener con índice de diversidad de 0,2. El análisis de correspondencia sin tendencia (DCA), el de escalamiento multidimensional no métrico (CMBD) y el procedimiento de permutación multi-respuesta (MRPP) confirmaron la separación de grupos TWINSPAN así como de la heterogeneidad de la comunidad de Artemisia sieberi-Schismus arabiscus sugiriendo un grupo distinto de la comunidad que tienen a Artemisia sieberi y Schismus arabicus como especie dominante. El anális de vegetación ambiental mediante técnicas multivariantes de análisis de componentes principales (PCA) y el análisis de correspondencia canónica (CCA) indicó que grava muy gruesa tiene un fuerte efecto negativo en la diversidad y el efecto negativo sobre el porcentaje de cobertura de las especies. El suelo desnudo mostró un efecto altamente positivo en las variables de diversidad. El análisis del suelo implica etapas seriales finales de sucesión a la desertificación severa.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[desert vegetation]]></kwd>
<kwd lng="en"><![CDATA[floristic inventory]]></kwd>
<kwd lng="en"><![CDATA[ordination]]></kwd>
<kwd lng="en"><![CDATA[cluster analysis]]></kwd>
<kwd lng="en"><![CDATA[TWINSPAN]]></kwd>
<kwd lng="es"><![CDATA[desierto de vegetación]]></kwd>
<kwd lng="es"><![CDATA[inventario florístico]]></kwd>
<kwd lng="es"><![CDATA[ordenación]]></kwd>
<kwd lng="es"><![CDATA[análisis de conglomerados]]></kwd>
<kwd lng="es"><![CDATA[TWINSPAN]]></kwd>
</kwd-group>
</article-meta>
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