<?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>0187-5779</journal-id>
<journal-title><![CDATA[Terra Latinoamericana]]></journal-title>
<abbrev-journal-title><![CDATA[Terra Latinoam]]></abbrev-journal-title>
<issn>0187-5779</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de la Ciencia del Suelo A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-57792022000100106</article-id>
<article-id pub-id-type="doi">10.28940/terra.v40i0.1043</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Análisis de contingencia de la distribución natural de pinos mexicanos en categoría de riesgo]]></article-title>
<article-title xml:lang="en"><![CDATA[Contingency analysis of natural distribution of Mexican pines in risk category]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-Miranda]]></surname>
<given-names><![CDATA[Ramiro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Velasco Bautista]]></surname>
<given-names><![CDATA[Efraín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Romero-Sánchez]]></surname>
<given-names><![CDATA[Martín Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Ramos]]></surname>
<given-names><![CDATA[Jonathan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias  ]]></institution>
<addr-line><![CDATA[Coyoacán Ciudad de México]]></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>40</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-57792022000100106&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-57792022000100106&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-57792022000100106&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Los estudios sobre la distribución natural de especies son necesarios para determinar el efecto de las condiciones sociales y ambientales en su distribución espacial. Los objetivos de este trabajo fueron conocer la distribución natural de especies de pino, consideradas en riesgo por las leyes mexicanas e identificar la posible asociación entre estas categorías y factores socio-ambientales (marginación, degradación de suelos y productividad forestal). Para esto, se integró una base de datos sobre ubicación y características socioeconómicas de los pinos creada a partir de diversas fuentes. La independencia entre las categorías de riesgo de los pinos y los factores socio-ambientales se evaluó mediante un análisis de contingencia, el cual considera como estadístico de prueba una chi-cuadrada. Se obtuvo un total de 2480 registros de las 20 especies de pinos listadas. En zonas de muy alta marginación se encuentra 4.48% de los registros, 26.21% en alta, el 18.47% en media y 50.85% en baja. Trece especies se encuentran en suelos degradados: 55.79% de los registros están en situación moderada, 37.76% ligera, 6.22% fuerte y el 0.21% extrema. En áreas de producción se encuentran 65.89% (del total de las especies), 30.81% en conservación y el 3.31% en restauración. Las estadísticas de prueba de chi-cuadrada manifestaron que las proporciones de las especies de pino en peligro de extinción &#9472;y en protección especial&#9472; no son iguales en los diferentes tipos de zonificación forestal, así como en los distintos grados de marginación y de degradación del suelo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Summary: Studies on species natural distribution are necessary to determine the effect of social and environmental conditions on spatial distribution. The objectives of this research were to know the natural distribution of pine species considered at risk by Mexican laws and identify the possible association between these categories and socio-environmental factors (marginalization, soil degradation and forest productivity). For this purpose, a database was created on location and socioeconomic characteristics of the pines created from various sources. The independence between the risk categories of the pines and the socio-environmental factors was evaluated by means of a contingency analysis, which considers a chi-square statistics test. Of the 20 listed pine species, a total of 2480 records were obtained. Highly marginalized areas recorded 4.48%, high 26.21%, medium 18.47%, and low 50.85%. Thirteen species are found on degraded soils; 55.79% of the records are in a moderate situation, 37.76% light, 6.22% strong, and 0.21% extreme. Production, areas recorded 65.89% (of the total species), 30.81% in Conservation and 3.31% in restoration. The chi-square statistics test showed that the proportions of pine species in danger of extinction &#9472;and in special protection&#9472; are not the same in the different types of forest zoning, as well as in the different degrees of marginalization and soil degradation.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[bosques templados]]></kwd>
<kwd lng="es"><![CDATA[chi-cuadrada]]></kwd>
<kwd lng="es"><![CDATA[conservación]]></kwd>
<kwd lng="es"><![CDATA[factores socio-ambientales]]></kwd>
<kwd lng="en"><![CDATA[temperate forests]]></kwd>
<kwd lng="en"><![CDATA[chi-square]]></kwd>
<kwd lng="en"><![CDATA[conservation]]></kwd>
<kwd lng="en"><![CDATA[socio-environmental factors]]></kwd>
</kwd-group>
</article-meta>
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