<?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>S0187-57792012000200177</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Almacenes de carbono en el piso forestal de dos tipos de bosque]]></article-title>
<article-title xml:lang="en"><![CDATA[Forest floor carbon stocks of two types of forest]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gómez-Díaz]]></surname>
<given-names><![CDATA[Jesús D.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Monterroso-Rivas]]></surname>
<given-names><![CDATA[Alejandro I.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tinoco-Rueda]]></surname>
<given-names><![CDATA[Juan A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Etchevers-Barra]]></surname>
<given-names><![CDATA[Jorge D.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma Chapingo Departamento de Suelos ]]></institution>
<addr-line><![CDATA[ estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma Chapingo CRUO ]]></institution>
<addr-line><![CDATA[ Veracruz]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Colegio de Postgraduados Campus Montecillo ]]></institution>
<addr-line><![CDATA[ estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2012</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2012</year>
</pub-date>
<volume>30</volume>
<numero>2</numero>
<fpage>177</fpage>
<lpage>187</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-57792012000200177&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-57792012000200177&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-57792012000200177&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: El bosque de encino (dominado por Quercus spp.) y el bosque tropical seco son dos de los principales tipos de vegetación en México donde los almacenes de carbono del piso forestal no han sido evaluados frecuentemente. Por lo anterior, en el presente estudio se realizó la evaluación de los almacenes de carbono del piso forestal en tres estados sucesionales de un bosque de encino y de un bosque tropical seco de la Reserva de la Biosfera Sierra de Huautla, Morelos. Los estados sucesionales para los dos tipos de bosque fueron: secundario temprano (i.e., 10 años), secundario medio (i.e., 20 años) y maduro (i.e., 40 años). Para cada estado sucesional se delimitaron tres sitios de muestreo de 1000 m2 en donde se tomaron 12 muestras en un m2 en cada sitio. En el bosque de encino se delimitaron dos estratos, el L de residuos vegetales con poca o nula descomposición y el F + H, un estrato con materiales cuya descomposición es de moderada a avanzada. Para el bosque de encino, los contenidos de carbono en el piso forestal fueron significativamente diferentes en la cronosecuencia con valores de 5.6±0.5, 8.0±0.6 y 10.3±0.6 Mg de C ha-1 para las condiciones sucesionales de bosque secundario temprano, secundario medio y maduro, respectivamente. En el bosque tropical seco sólo se encontraron materiales orgánicos característicos de la capa L y los contenidos de C fueron significativamente menores que en el bosque de encino. Los contenidos de carbono resultaron significativamente mayores en el bosque de más edad y en el más joven, comparados con la del bosque secundario medio, con valores de 1.9±0.2, 0.8±0.1 y 2.2±0.3 Mg de C ha-1, para las fases sucesionales de bosque secundario temprano, secundario medio y maduro, respectivamente.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Oak forest (dominated by Quercus spp.) and tropical dry forest are among two of the main forest vegetation types in Mexico, and their carbon stocks associated with the forest floor have not been frequently evaluated. Based on this, the present study was planned to provide data on forest floor carbon stocks in successional stages of both type of forests in the Biosphere Reserve Sierra de Huautla, Morelos. Three successional stages of the forest types were considered: secondary early (i.e., 10 years old), secondary mid (i.e., 20 years old) and mature (i.e., 40 years old). For each forest type and successional status three 1000 m2 sampling plots were delimited and within each one 12 one m2 quadrants were randomly selected. In the oak forest, two layers of organic material in the forest floor were determined: L stratum consisting of recently fallen non decomposed materials, and F+H layer consisting of partly to strongly decomposed plant material. The forest floor carbon stocks were significantly different in the three successional stages for both vegetation types. In the oak forest the estimated values of C contents were 5.6±0.5, 8.0±0.6 and 10.3±0.6 Mg of C ha-1 for the secondary early, secondary mid, and mature successional stages, respectively. For the tropical dry forest, only organic materials characteristics of L layer were distinguished in the forest floor and their carbon stocks were significantly lower than those of the oak forest. The forest floor carbon stocks of the old and young successional stages were significantly higher than in the secondary mid successional stage with values of 1.9±0.2, 0.8±0.1 and 2.2±0.3 Mg of C ha-1, for the secondary early, secondary mid and mature successional tropical dry forest, respectively.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[capa L]]></kwd>
<kwd lng="es"><![CDATA[capa F+H]]></kwd>
<kwd lng="es"><![CDATA[bosque de encino]]></kwd>
<kwd lng="es"><![CDATA[bosque tropical seco]]></kwd>
<kwd lng="en"><![CDATA[layer L]]></kwd>
<kwd lng="en"><![CDATA[layer F+H]]></kwd>
<kwd lng="en"><![CDATA[oak forest]]></kwd>
<kwd lng="en"><![CDATA[tropical dry forest]]></kwd>
</kwd-group>
</article-meta>
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