Respuesta de madera temprana y tardía a la sequía en una conífera mexicana bajo dos condiciones ecológicas
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Abstract
Pompa-García, M., Domínguez-Calleros, P.A. 2015. Respuesta de madera temprana y tardía a la sequía en una conífera mexicana bajo dos condiciones ecológicas. Ecosistemas 24(2): 37-42. Doi.: 10.7818/ECOS.2015.24-2.06
Earlywood (EW) and latewood (LW) form during several temporary seasons and thus capture the ecological conditions at different time intervals. EW and LW response to drought for over a century for a representative conifer of Northern Mexico was evaluated in this study under two different ecological conditions. The Standardised Precipitation-Evapotranspiration Index (SPEI) was correlated to EW and LW dendrochronological index. Tukey tests (α = 0.05) showed that EW represents 82% ring width, while 18 % corresponded to LW. The dendroclimatic analyses showed that drought conditions have influence on the proportions of EW and LW. EW was more sensitive to drought, particularly in those areas of higher elevation. LW seems most poorly influenced by water stress conditions during spring. These differences in growth have implications for forest productivity, carbon cycles and other ecological processes faced by the species.