Multivariate analysis of the vegetation of the volcanoes Tláloc and Pelado Mexico
Document Type: Journal Article
Author(s): A. Velázquez
Publication Year: 1994

Cataloging Information

  • Abies religiosa
  • agriculture
  • coniferous forests
  • cover
  • distribution
  • ecosystem dynamics
  • elevation
  • Festuca
  • forest management
  • grasslands
  • grazing
  • Iva
  • litter
  • Mexico
  • moisture
  • Muhlenbergia
  • pine forests
  • Pinus
  • plant communities
  • soil moisture
  • species diversity (plants)
  • statistical analysis
  • vegetation surveys
  • volcanoes
Record Maintained By:
Record Last Modified: June 1, 2018
FRAMES Record Number: 36655
Tall Timbers Record Number: 11054
TTRS Location Status: In-file
TTRS Call Number: Fire File
TTRS Abstract Status: Okay, Fair use, Reproduced by permission

This bibliographic record was either created or modified by the Tall Timbers Research Station and Land Conservancy and is provided without charge to promote research and education in Fire Ecology. The E.V. Komarek Fire Ecology Database is the intellectual property of the Tall Timbers Research Station and Land Conservancy.


Multivariate analysis was used to describe the composition and distribution of vegetation types on the slopes of the volcanoes Tláloc and Pelado, Mexico. These volcanoes are situated in the transitional zone between the Holarctic and Neotropical floristic regions, which offers a partial explanation for the relatively high a and b diversities. Previous research argued that human activities, i.e. burning and grazing, rather than abiotic factors, play a major role in determining the distribution and floristic composition of the vegetation. TWINSPAN, Detrended Correspondence Analysis and Canonical Correspondence Analysis were used to test this hypothesis. Floristic and environmental data from 138 relevés and seven explanatory environmental variables were included: elevation, soil depth, soil moisture, percentage litter cover, percentage cover of bare ground, burning and grazing were included in the analysis. Soil moisture and elevation accounted for ca. 63% of the residual inertia and none of the remaining explanatory variables proved to correlated significantly with the first two axes. The present results suggest that burning and grazing operate on a finer scale. In conclusion, soil moisture and elevation are the most relevant variables to explain the distribution of the vegetation under study.© IVAS; Opulus Press Uppsala.

Velázquez, A. 1994. Multivariate analysis of the vegetation of the volcanoes Tláloc and Pelado Mexico. Journal of Vegetation Science, v. 5, p. 263-270.