<?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>S1870-34532018000100208</article-id>
<article-id pub-id-type="doi">10.22201/ib.20078706e.2018.1.2117</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[1580 años de impacto humano y cambio climático en la dinámica del bosque de Pinus-Quercus-Abies en el centro-occidente de México]]></article-title>
<article-title xml:lang="en"><![CDATA[1580 years of human impact and climate change on the dynamics of a Pinus-Quercus-Abies forest in west-central Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castillo-Batista]]></surname>
<given-names><![CDATA[Ana Patricia del]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Figueroa-Rangel]]></surname>
<given-names><![CDATA[Blanca Lorena]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lozano-García]]></surname>
<given-names><![CDATA[Socorro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Olvera-Vargas]]></surname>
<given-names><![CDATA[Miguel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cuevas-Guzmán]]></surname>
<given-names><![CDATA[Ramón]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Guadalajara Centro Universitario de la Costa Sur Posgrado en Biosistemática, Ecología y Manejo de Recursos Naturales y Agrícolas]]></institution>
<addr-line><![CDATA[Autlán de Navarro Jalisco]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Guadalajara Centro Universitario de la Costa Sur ]]></institution>
<addr-line><![CDATA[Autlán de Navarro Jalisco]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Geología Departamento de Paleontología]]></institution>
<addr-line><![CDATA[ Ciudad de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2018</year>
</pub-date>
<volume>89</volume>
<numero>1</numero>
<fpage>208</fpage>
<lpage>225</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-34532018000100208&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-34532018000100208&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-34532018000100208&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Se presentan los resultados de la reconstrucción de la vegetación y el ambiente de los últimos 1,580 años en un bosque dominado por Pinus-Quercus-Abies en el centro-occidente de México. Se utilizaron técnicas paleoecológicas que incluyen el análisis polínico, partículas de microcarbón fósil y elementos geoquímicos, se documentan los cambios ocurridos en la composición taxonómica de la vegetación, su relación con actividades antropogénicas y el cambio climático. La cronología se determinó con base en el análisis de 14C y un modelo de edad-profundidad por interpolación lineal. Se realizó un análisis de redundancia (RDA) para identificar patrones de ordenación en la composición de los taxones y las variables ambientales y un análisis de correlación cruzada entre los taxones y las partículas de microcarbón fósil para determinar su sincronía. Los resultados del registro palinológico indican que Pinus ha sido el taxón dominante en gran parte de la secuencia, acompañado de taxones codominantes como Quercus, Abies y Alnus. El análisis de correlación cruzada indicó que existe una correlación positiva con Pinus y Ternstroemia, ambos en sincronía con las partículas de microcarbón fósil. El RDA muestra que Pinus, Asteraceae, Poaceae, Phaseolus y Zea se encuentran asociados a incendios forestales. También fueron identificados 2 eventos de cambio climático como la Anomalía Climática Medieval (ACM) (~950-1400 d.C.) y la Pequeña Edad de Hielo (PEH) (~1350-1850 d.C.). Las principales respuestas de la vegetación fueron la expansión del bosque de pino en la primera parte y su disminución, al final de la ACM. Durante la PEH la vegetación fue fluctuante en la composición de taxones. La evidencia del registro polínico indica la existencia de impacto humano por la presencia de taxones culturales como Amaranthaceae, Asteraceae, Phaseolus y Zea a partir de ~370 d.C. al presente. La evidencia señala patrones complejos en las respuestas de la vegetación durante los periodos de cambio ambiental, por lo que pueden ofrecer nuevos escenarios para evaluar los impactos del cambio climático a nivel local.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: The present research involved vegetation and environmental reconstruction of a Pinus-Quercus-Abies dominated forest in west-central Mexico over the last 1,580 years. Paleoecological techniques such as the analysis of pollen, micro-fossil charcoal particles, and geochemical elements were used to document changes in the taxonomic composition of vegetation and its relationship with anthropogenic activities and climate change. Chronology was determined using 14C dating and the age-depth model was constructed by linear interpolation. A redundancy analysis (RDA) was performed to identify patterns in composition of taxa and environmental variables and a cross-correlation analysis between taxa and micro fossil charcoal particles to determine synchrony. Results of the palynological record indicate that Pinus has been the dominant taxon throughout the sequence, together with codominant taxa such as Quercus, Abies and Alnus. Cross-correlation analysis indicated a positive correlation with Pinus and Ternstroemia, both in synchrony with micro-fossil charcoal. RDA showed that Pinus, Asteraceae, Poaceae, Phaseolus and Zea are associated with forest fires. Two events of climate change were identified: the Medieval Climatic Anomaly (MCA) (~ 950-1400 AD) and the Little Ice Age (LIA) (~ 1350-1850 AD). Main vegetation responses were the expansion of pine forest in the beginning of the ACM and a decrease at the end of this period; throughout the PEH, vegetation fluctuated in the composition of taxa. Pollen of cultural taxa such as Amaranthaceae, Asteraceae, Phaseolus, and Zea suggests the existence of human impact from ~1,580 AD to the present. The evidence points to complex patterns in response of the vegetation during periods of environmental change, which may offer new scenarios for assessing the impacts of local climate change.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Anomalía Climática Medieval]]></kwd>
<kwd lng="es"><![CDATA[Pequeña Edad de Hielo]]></kwd>
<kwd lng="es"><![CDATA[Paleoecología]]></kwd>
<kwd lng="es"><![CDATA[Macropartículas de carbón fósil]]></kwd>
<kwd lng="es"><![CDATA[Polen fósil]]></kwd>
<kwd lng="en"><![CDATA[Medieval Climatic Anomaly]]></kwd>
<kwd lng="en"><![CDATA[Little Ice Age]]></kwd>
<kwd lng="en"><![CDATA[Paleoecology]]></kwd>
<kwd lng="en"><![CDATA[Charcoal particles]]></kwd>
<kwd lng="en"><![CDATA[Fossil pollen]]></kwd>
</kwd-group>
</article-meta>
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