Distribution of plant life forms along an altitudinal gradient in the semi-arid valley of Zapotitlán, Mexico
Article first published online: 24 FEB 2009
2000 IAVS - the International Association of Vegetation Science
Journal of Vegetation Science
Volume 11, Issue 1, pages 39–42, February 2000
How to Cite
Pavón, N. P., Hernández-Trejo, H. and Rico-Gray, V. (2000), Distribution of plant life forms along an altitudinal gradient in the semi-arid valley of Zapotitlán, Mexico. Journal of Vegetation Science, 11: 39–42. doi: 10.2307/3236773
- Issue published online: 24 FEB 2009
- Article first published online: 24 FEB 2009
- Received 23 August 1997; Revision received 22 April 1998; Accepted 3 April 1999. Coordinating Editor: E. van der Maarel.
- Columnar cactus;
- Life form diversity;
- Semi-arid habitat
- Dávila et al. (1993)
Abstract. Plant life-form abundance along a 600 m altitudinal gradient (1600–2200 m a.s.l.) in the semi-arid valley of Zapotitlán, México was correlated with soil characteristics and climatic variables. One mixed soil sample was taken and analysed for each of six elevations, temperature was estimated using a terrestrial thermal gradient, and precipitation using a linear regression between total annual precipitation and the elevation of the weather stations in the valley. Rosettes, microphanerophytes, therophytes and nanophanerophytes were well represented throughout the gradient. Columnar cacti were restricted to the 1600–1800 m range, and geophytes to the 1700–1800 m range. In general, abundance of life forms was inversely associated with altitude. Multiple regression analysis did not show parameters to significantly explain the abundance of rosettes, nanophanerophytes, epiphytes, geophytes and hemiparasites; altitude and nitrogen proved significant for columnar cacti, succulents and chamaephytes; altitude, pH, electrical conductivity and nitrogen were significant for globose cacti; pH was significant for therophytes; and altitude was significant for microphanerophytes.