Abstract

MANZANILLA-QUINONES, Ulises; DELGADO-VALERIO, Patricia; CARLON-ALLENDE, Teodoro  and  MOLINA-SANCHEZ, Agustín. Dendrchoronological potential of Pinus rzedowskii Madrigal et Caballero: an endemic species of Michoacán. Ecosistemas y recur. agropecuarios [online]. 2023, vol.10, n.3, e3850.  Epub Apr 26, 2024. ISSN 2007-901X.  https://doi.org/10.19136/era.a10n3.3850.

Pinus rzedowskii is a pine species endemic to Michoacán, distributed in the Sierra de Coalcomán. The objective of this research was to analyze the dendrochronological potential of the species. Sixty-six growth cores were taken from 22 trees of P. rzedowskii. The samples were analyzed by dendrochronological techniques, the ring width was measured in a VELMEX® equipment, the quality of the dating and measurement was verified by Cofecha. A chronology was generated in Arstan, then Bootstrap correlations were performed between the chronology and climatic data from weather stations near the study site. The dated samples (n = 45, r = 0.403, p < 0.01) covered 1730-2021, indicating that the longest-lived tree is 292 years old. According to the evaluation of dendrochronological parameters; P. rzedowskii has a relatively low dendrochronological potential, however, it presents a significant climatic signal (r = 0.52, p < 0.01) with autumn-spring precipitation.

Keywords : Tree rings; radial growth; dendrochronology; Pinus; autumn-winter precipitation.

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