DENDROCHRONOLOGIC POTENTIAL OF Juniperus monticola MARTINEZ IN MOUNTAIN TLALOC, MEXICO

作者：Villanueva Diaz Jose; Vazquez Selem Lorenzo; Gomez Guerrero Armando; Cerano Paredes Julian; Aguirre Gonzalez Noe A; Franco Ramos Osvaldo

来源：Revista Fitotecnia Mexicana, 2016, 39(2): 175-185.

• Radial growth
• Mexican juniper
• ENSO
• Juniperus monticola

A 264-year chronological study (1750-2013) for total ring width was produced from 33 series of 50 specimens of Mexican juniper MJ, (Juniperus monticola Martinez), also known as enebro or cedro blanco, at Mount Tlaloc, along an altitudinal range from 3980 to 4060 masl. Despite irregular transversal sections and ring-width variability of this species, COFECHA and ARSTAN dendrochronological parameters like mean sensitivity (0.41), series intercorrelation (0.51), and signal-to-noise ratio (1.24) indicated that for dendrochronological studies are viable on this species. The correlation of the ring width series to mean annual temperature was statistically significant (r = 0.45, n = 54, p < 0.01). Also, a significant correlation was found for other dated series in Pinus hartwegii from the Iztaccihuatl and Pico de Orizaba volcanoes. Significant correlations were found between the SOI (r = -0.27, p < 0.01, n = 113) and PDSI indexes reconstructed for June in Central Mexico (r = 0.25, p < 0.01, n = 109). These results indicate that climatological events could be reliably predicted from rings of MJ trees grown at high altitudes (>3500 msnm). For this species, mean annual temperature correlated highest to ring width. Intense El Nino events associated to high radial growth. Given human influence on climate change and the ecological impact on high altitude species, MJ is a reliable species to understand climatic variability.

• 出版日期2016-6