<?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>1870-3453</journal-id>
<journal-title><![CDATA[Revista mexicana de biodiversidad]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Mex. Biodiv.]]></abbrev-journal-title>
<issn>1870-3453</issn>
<publisher>
<publisher-name><![CDATA[Instituto de Biología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-34532022000200205</article-id>
<article-id pub-id-type="doi">10.22201/ib.20078706e.2022.93.5008</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Factores asociados con la distribución espacial de muérdagos enanos en dos poblaciones de Pinus hartwegii del centro de México]]></article-title>
<article-title xml:lang="en"><![CDATA[Factors associated with the spatial distribution of dwarf mistletoes in two Pinus hartwegii populations in Central México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Endara-Agramont]]></surname>
<given-names><![CDATA[Angel Rolando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Heredia-Bobadilla]]></surname>
<given-names><![CDATA[Rosa Laura]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Almaraz]]></surname>
<given-names><![CDATA[Luis Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Luna-Gil]]></surname>
<given-names><![CDATA[Alma Abigail]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Franco-Maass]]></surname>
<given-names><![CDATA[Sergio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cibrián-Llanderal]]></surname>
<given-names><![CDATA[Víctor David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma del Estado de México Instituto de Ciencias Agropecuarias y Rurales ]]></institution>
<addr-line><![CDATA[Toluca Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Colegio de Postgraduados  ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2022</year>
</pub-date>
<volume>93</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-34532022000200205&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-34532022000200205&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-34532022000200205&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Los muérdagos (Arceuthobium globosum y A. vaginatum) afectan los bosques de Pinus hartwegii, se distribuyen en las partes altas de las montañas de México (3,000-4,200 m snm). El objetivo del estudio fue determinar los factores asociados con la presencia y niveles de infestación de dichos muérdagos en 2 montañas de México. Para ello, se establecieron 1,622 sitios de muestreo en el Área de Protección de Flora y Fauna Nevado de Toluca y 634 en Monte Tláloc, donde se registró la presencia y grado de infestación de la regeneración e individuos adultos (&#8805; 7.5 cm de DN). Se obtuvieron datos de localización de los sitios de muestreo, altitud, pendiente, orientación de ladera, dominancia de los estratos herbáceo y arbustivo, presencia de individuos muertos y la infestación por descortezador (Dendroctonus adjunctus). Posteriormente, se realizó una prueba de correlación para identificar los factores relacionados con la presencia de muérdagos, además de un análisis de componentes principales. Esta investigación reveló que 37% de la superficie forestal se encuentra infestada por muérdagos enanos; la presencia de descortezadores y la orientación del sitio son los principales factores que inciden en la mayor infestación de muérdagos en los bosques del área de estudio.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Dwarf mistletoes (Arceuthobium globosum and A. vaginatum) represent a threat to the Pinus hartwegii forests distributed in the high parts of mountains in Mexico (3,000-4,200 m asl). The objective of the study was to determine the factors associated with the presence and levels of infestation of such mistletoes in 2 mountains of Mexico. Two thousand, two hundred and fifty-four sampling sites were established, 1,622 in the Nevado de Toluca Flora and Fauna Protection Area and 634 in Monte Tláloc, to register the presence and degree of infestation of regeneration and adult individuals (&#8805; 7.5 cm DN). The data obtained in the sampling sites included geographical location, altitude, slope, slope orientation, the dominance of the herbaceous and shrubby strata, presence of dead or damaged individuals and infestation by bark beetle (Dendroctonus adjunctus). A correlation test was performed to identify the factors related with the presence of mistletoes, in addition to a principal component analysis. This study revealed that dwarf mistletoes infest 37% of the forest area; the presence of bark beetles and the site orientation are the main factors that influence on the infestation of mistletoes in the studied forests.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Coníferas]]></kwd>
<kwd lng="es"><![CDATA[Parásitos]]></kwd>
<kwd lng="es"><![CDATA[Pino de las alturas]]></kwd>
<kwd lng="es"><![CDATA[Regeneración]]></kwd>
<kwd lng="es"><![CDATA[Niveles de infestación]]></kwd>
<kwd lng="en"><![CDATA[Conifers]]></kwd>
<kwd lng="en"><![CDATA[Parasites]]></kwd>
<kwd lng="en"><![CDATA[High mountain pine]]></kwd>
<kwd lng="en"><![CDATA[Regeneration]]></kwd>
<kwd lng="en"><![CDATA[Infestation levels]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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