<?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>2007-4018</journal-id>
<journal-title><![CDATA[Revista Chapingo serie ciencias forestales y del ambiente]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Chapingo ser. cienc. for. ambient]]></abbrev-journal-title>
<issn>2007-4018</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma Chapingo, Coordinación de Revistas Institucionales]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-40182017000200261</article-id>
<article-id pub-id-type="doi">10.5154/r.rchscfa.2016.10.055</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Pinus hartwegii Lindl. treeline ecotone: structure and altitudinal limits at Nevado de Toluca, Mexico]]></article-title>
<article-title xml:lang="es"><![CDATA[Ecotono del límite superior del bosque de Pinus hartwegii Lindl.: estructura y límites altitudinales en el Nevado de Toluca, México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alfaro-Ramírez]]></surname>
<given-names><![CDATA[Farid U.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arredondo-Moreno]]></surname>
<given-names><![CDATA[José T.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-Suárez]]></surname>
<given-names><![CDATA[Marlín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Endara-Agramont]]></surname>
<given-names><![CDATA[Ángel R.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</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 de Lerdo Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Potosino de Investigación Científica y Tecnológica División de Ciencias Ambientales ]]></institution>
<addr-line><![CDATA[San Luís Potosí San Luís Potosí]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2017</year>
</pub-date>
<volume>23</volume>
<numero>2</numero>
<fpage>261</fpage>
<lpage>273</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-40182017000200261&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-40182017000200261&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-40182017000200261&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction: Treeline ecotone complexity might function as a barrier to altitudinal migration of Pinus hartwegii Lindl.  Objectives: P. hartwegii forest structure was characterized through its treeline ecotone at Nevado de Toluca; in addition, possible changes in altitudinal limits over the last 25 years were determined.  Materials and methods:  Height and diameter at breast height (DBH) of each tree were determined, as well as natural forest regeneration and tree density. Altitudinal limits were determined on satellite images from 1989 and 2014 using the moving split window method.  Results and discussion: Tree density fell between 8 and 70 % across altitudinal gradient. Altitudinal limits (3,980-4,130 m) did not show significant differences (P = 0.07) between two evaluated years. The P. hartwegii ecotone displays a diffuse form, regulated by growth limitations. This implies that the forest might modify its altitudinal distribution based on environmental changes, according to its ecological amplitude and how fast new individuals can become established at higher altitudes.  Conclusion:  Long-term monitoring is important to know if P. hartwegii is actually capable of migrating altitudinally as a result of increased environmental temperature.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción: La complejidad del ecotono del límite superior del bosque de Pinus hartwegii puede funcionar como una barrera para la migración altitudinal.  Objetivos:  La estructura del bosque de P. hartwegii se caracterizó a través del ecotono de su límite superior en el Nevado de Toluca; además, se determinaron los posibles cambios en los límites altitudinales en los últimos 25 años.  Materiales y métodos:  Se determinaron la densidad arbórea, altura y diámetro normal de cada árbol, y la regeneración natural del bosque. Los límites altitudinales se determinaron mediante el método de la ventana móvil en imágenes de satélite de 1989 y 2014.  Resultados y discusión: La densidad del arbolado se redujo entre 8 y 70 % en el gradiente altitudinal. Los límites altitudinales (3,980-4,130 m) no presentaron diferencias significativas (P = 0.07) entre los años evaluados. El ecotono es de forma difusa, regulado por limitaciones al crecimiento. Esto implica que el bosque modificará su distribución altitudinal en función de los cambios ambientales, de acuerdo con su amplitud ecológica y la rapidez con que puedan establecerse nuevos individuos a mayores altitudes.  Conclusión: Es importante establecer monitoreos, a largo plazo, para saber si la especie es realmente capaz de migrar altitudinalmente como resultado del incremento de temperatura ambiental.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[High mountain]]></kwd>
<kwd lng="en"><![CDATA[diameter classes]]></kwd>
<kwd lng="en"><![CDATA[dendrometry]]></kwd>
<kwd lng="en"><![CDATA[altitudinal gradient]]></kwd>
<kwd lng="en"><![CDATA[forest patches]]></kwd>
<kwd lng="en"><![CDATA[transition zone]]></kwd>
<kwd lng="es"><![CDATA[Alta montaña]]></kwd>
<kwd lng="es"><![CDATA[clases diamétricas]]></kwd>
<kwd lng="es"><![CDATA[dendrometría]]></kwd>
<kwd lng="es"><![CDATA[gradiente altitudinal]]></kwd>
<kwd lng="es"><![CDATA[parches de bosque]]></kwd>
<kwd lng="es"><![CDATA[zona de transición]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Aitken]]></surname>
<given-names><![CDATA[N. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Yeaman]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Holliday]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Curtis-McLane]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Adaptation, migration or extirpation: Climate change outcomes for tree populations]]></article-title>
<source><![CDATA[Evolutionary Applications]]></source>
<year>2008</year>
<volume>1</volume>
<page-range>95&#8722;111</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bader]]></surname>
<given-names><![CDATA[M. Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Rietkerk]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Bregt]]></surname>
<given-names><![CDATA[A. K.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Vegetation structure and temperature regimes of tropical alpine treelines]]></article-title>
<source><![CDATA[Arctic, Antarctic, and Alpine Research]]></source>
<year>2007</year>
<volume>39</volume>
<page-range>353&#8722;364</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Beaman]]></surname>
<given-names><![CDATA[J. H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The timberlines of Iztaccíhuatl and Popocatepetl, Mexico]]></article-title>
<source><![CDATA[Ecology]]></source>
<year>1962</year>
<volume>43</volume>
<page-range>377&#8722;385</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Calderón de Rzedowski]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Rzedowski]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Flora fanerogámica del Valle de México]]></source>
<year>2005</year>
<publisher-loc><![CDATA[Michoacán, México ]]></publisher-loc>
<publisher-name><![CDATA[INECOL-CONABIO]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Camarero]]></surname>
<given-names><![CDATA[J. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Fortin]]></surname>
<given-names><![CDATA[M. J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Detección cuantitativa de fronteras ecológicas y ecotonos]]></article-title>
<source><![CDATA[Ecosistemas]]></source>
<year>2006</year>
<volume>15</volume>
<page-range>77&#8722;88</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Camarero]]></surname>
<given-names><![CDATA[J. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Gutiérrez]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Pace and pattern of recent treeline dynamics: Response of ecotones to climatic variability in the Spanish Pyrenees]]></article-title>
<source><![CDATA[Climatic Change]]></source>
<year>2004</year>
<volume>63</volume>
<page-range>181&#8722;200</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cárdenas]]></surname>
<given-names><![CDATA[D. I.]]></given-names>
</name>
<name>
<surname><![CDATA[Martínez]]></surname>
<given-names><![CDATA[V. M. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Bravo]]></surname>
<given-names><![CDATA[I. J. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Núñez]]></surname>
<given-names><![CDATA[B. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Caballero]]></surname>
<given-names><![CDATA[G. R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Manejemos el bosque]]></source>
<year>2008</year>
<publisher-loc><![CDATA[La Habana, Cuba ]]></publisher-loc>
<publisher-name><![CDATA[ACTAF.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Challenger]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Soberón]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Los ecosistemas terrestres. En Comisión Nacional para el Conocimiento y Uso de la Biodiversidad]]></article-title>
<source><![CDATA[Capital natural de México, vol. I: Conocimiento actual de la biodiversidad]]></source>
<year>2008</year>
<page-range>87&#8722;108</page-range><publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[CONABIO]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="book">
<collab>Clarck Labs</collab>
<source><![CDATA[IDRISI Selva]]></source>
<year>2012</year>
<publisher-loc><![CDATA[Worcester, MA, USA ]]></publisher-loc>
<publisher-name><![CDATA[Clark University]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Coop]]></surname>
<given-names><![CDATA[J. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Givnish]]></surname>
<given-names><![CDATA[T. J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Constraints on tree seedling establishment in montane grasslands of the Valles Caldera, New Mexico]]></article-title>
<source><![CDATA[Ecology]]></source>
<year>2008</year>
<volume>89</volume>
<page-range>1101&#8722;1111</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Carta de climas, Atlas Nacional de México]]></source>
<year>1990</year>
<publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México (UNAM)]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[González-Rosales]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Rodríguez-Trejo]]></surname>
<given-names><![CDATA[D. A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Efecto del chamuscado de copa en el crecimiento en diámetro de Pinus hartwegii Lindl. en el Distrito Federal, México]]></article-title>
<source><![CDATA[Agrociencia]]></source>
<year>2004</year>
<volume>38</volume>
<page-range>537&#8722;544</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Harsch]]></surname>
<given-names><![CDATA[M. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Bader]]></surname>
<given-names><![CDATA[M. Y.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Treeline form - a potential key to understanding treeline dynamics]]></article-title>
<source><![CDATA[Global Ecology and Biogeography]]></source>
<year>2011</year>
<volume>20</volume>
<page-range>582&#8722;596</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Harsch]]></surname>
<given-names><![CDATA[M. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Hulme]]></surname>
<given-names><![CDATA[P. E.]]></given-names>
</name>
<name>
<surname><![CDATA[McGlone]]></surname>
<given-names><![CDATA[M. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Duncan]]></surname>
<given-names><![CDATA[R. P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Are treelines advancing? A global meta-analysis of treeline response to climate warming]]></article-title>
<source><![CDATA[Ecology Letters]]></source>
<year>2009</year>
<volume>12</volume>
<page-range>1040&#8722;1049</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Holtmeier]]></surname>
<given-names><![CDATA[F. K.]]></given-names>
</name>
<name>
<surname><![CDATA[Broll]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Sensitivity and response of northern hemisphere altitudinal and polar treelines to environmental change at landscape and local scales]]></article-title>
<source><![CDATA[Global Ecology and Biogeography]]></source>
<year>2005</year>
<volume>14</volume>
<page-range>395&#8722;410</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Iglesias]]></surname>
<given-names><![CDATA[A. L. G.]]></given-names>
</name>
<name>
<surname><![CDATA[Tivo]]></surname>
<given-names><![CDATA[F. Y.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Caracterización morfométrica de la población de Pinus hartwegii Lindl. del Cofre de Perote, Veracruz, México]]></article-title>
<source><![CDATA[Ra Ximhai]]></source>
<year>2006</year>
<volume>2</volume>
<page-range>449&#8722;468</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jobbágy]]></surname>
<given-names><![CDATA[E. G.]]></given-names>
</name>
<name>
<surname><![CDATA[Jackson]]></surname>
<given-names><![CDATA[R. B.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Global controls of forest line elevation in the northern and southern hemispheres]]></article-title>
<source><![CDATA[Global Ecology and Biogeography]]></source>
<year>2000</year>
<volume>9</volume>
<page-range>253-68</page-range></nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Körner]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A re-assessment of high elevation treeline positions and their explanation]]></article-title>
<source><![CDATA[Oecologia]]></source>
<year>1998</year>
<volume>115</volume>
<page-range>445&#8722;459</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Körner]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Paulsen]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A world-wide study of high altitude treeline temperatures]]></article-title>
<source><![CDATA[Journal of Biogeography]]></source>
<year>2004</year>
<volume>31</volume>
<page-range>713&#8722;732</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lauer]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The altitudinal belts of the vegetation in the central Mexican highlands and their climatic conditions]]></article-title>
<source><![CDATA[Arctic and Alpine Research]]></source>
<year>1973</year>
<volume>5</volume>
<page-range>A99&#8722;A113</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lutz]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Larson]]></surname>
<given-names><![CDATA[A. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Freund]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Swanson]]></surname>
<given-names><![CDATA[M. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Bible]]></surname>
<given-names><![CDATA[K. J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The importance of large-diameter trees to forest structural heterogeneity]]></article-title>
<source><![CDATA[PLoS ONE]]></source>
<year>2013</year>
<volume>812</volume>
</nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Matteucci]]></surname>
<given-names><![CDATA[S. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Colma]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Metodología para el estudio de la vegetación]]></source>
<year>1982</year>
<publisher-loc><![CDATA[Washington, DC, USA ]]></publisher-loc>
<publisher-name><![CDATA[Secretaría General de la Organización de los Estados Americanos-Programa Regional de Desarrollo Científico y Tecnológico]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Perry]]></surname>
<given-names><![CDATA[J. P. Jr.]]></given-names>
</name>
</person-group>
<source><![CDATA[The pines of Mexico and Central America]]></source>
<year>1991</year>
<publisher-loc><![CDATA[Portland, USA ]]></publisher-loc>
<publisher-name><![CDATA[Timber Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ricker]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Gutiérrez-García]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Daly]]></surname>
<given-names><![CDATA[D. C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Modeling long-term tree growth curves in response to warming climate: Test cases from a subtropical mountain forest and a tropical rainforest in México]]></article-title>
<source><![CDATA[Canadian Journal of Forest Research]]></source>
<year>2007</year>
<volume>37</volume>
<page-range>977&#8722;989</page-range></nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="book">
<collab>Statistical Analysis System</collab>
<source><![CDATA[JMP 8.0, Statistical discovery from SAS]]></source>
<year>2008</year>
<publisher-loc><![CDATA[Cary, NC, USA ]]></publisher-loc>
<publisher-name><![CDATA[Author]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tranquillini]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The physiology of plants at high altitudes]]></article-title>
<source><![CDATA[Plant Physiology]]></source>
<year>1964</year>
<volume>15</volume>
<page-range>345&#8722;362</page-range></nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vera-Vilchis]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
<name>
<surname><![CDATA[Rodríguez-Trejo]]></surname>
<given-names><![CDATA[D. A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Survival and height increment of Pinus hartwegii two years after prescribed burns and experimental forest fires]]></article-title>
<source><![CDATA[Agrociencia]]></source>
<year>2007</year>
<volume>41</volume>
<page-range>219&#8722;230</page-range></nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Viveros-Viveros]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Sáenz-Romero]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Vargas-Hernández]]></surname>
<given-names><![CDATA[J. J.]]></given-names>
</name>
<name>
<surname><![CDATA[López-Upton]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Ramírez-Valverde]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Santacruz-Varela]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Altitudinal genetic variation in Pinus hartwegii Lindl.: Height growth, shoot phenology and cold damage in seedlings]]></article-title>
<source><![CDATA[Forest Ecology and Management]]></source>
<year>2009</year>
<volume>257</volume>
<page-range>836&#8722;842</page-range></nlm-citation>
</ref>
<ref id="B29">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wong]]></surname>
<given-names><![CDATA[C. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Lertzman]]></surname>
<given-names><![CDATA[K. P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Errors in estimating tree age: Implications for studies of stand dynamics]]></article-title>
<source><![CDATA[Canadian Journal of Forest Research]]></source>
<year>2001</year>
<volume>31</volume>
<page-range>1262&#8722;1271</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
