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AOBPreview published online on July 5, 2006
Annals of Botany, doi:10.1093/aob/mcl142
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© The Author 2006. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org
Received April 4, 2006
Revised April 25, 2006
Accepted May 23, 2006

Article

Integrated Analysis of Tropical Trees Growth: A Multivariate Approach

LAURA YÁÑEZ-ESPINOSA 1 *, TERESA TERRAZAS 1, and LAURO LÓPEZ-MATA 1

1 Programa de Botánica, Colegio de Postgraduados, km 36·5 carr. México-Texcoco, Montecillo, Estado de México, 56230 México

* To whom correspondence should be addressed.
LAURA YÁÑEZ-ESPINOSA, E-mail: aurora06{at}prodigy.net.mx; lauray6711@hotmail.com


  Abstract

• Background and Aims One of the problems analysing cause-effect relationships of growth and environmental factors is that a single factor could be correlated with other ones directly influencing growth. One attempt to understand tropical trees' growth cause-effect relationships is integrating research about anatomical, physiological and environmental factors that influence growth in order to develop mathematical models. The relevance is to understand the nature of the process of growth and to model this as a function of the environment.

• Methods The relationships of Aphananthe monoica, Pleuranthodendron lindenii and Psychotria costivenia radial growth and phenology with environmental factors (local climate, vertical strata microclimate and physical and chemical soil variables) were evaluated from April 2000 to September 2001. The association among these groups of variables was determined by generalized canonical correlation analysis (GCCA), which considers the probable associations of three or more data groups and the selection of the most important variables for each data group.

• Key Results The GCCA allowed determination of a general model of relationships among tree phenology and radial growth with climate, microclimate and soil factors. A strong influence of climate in phenology and radial growth existed. Leaf initiation and cambial activity periods were associated with maximum temperature and day length, and vascular tissue differentiation with soil moisture and rainfall. The analyses of individual species detected different relationships for the three species.

• Conclusions The analyses of the individual species suggest that each one takes advantage in a different way of the environment in which they are growing, allowing them to coexist.

Keywords: Phenology, radial growth, climatic periodicity, microclimate, tropical trees, multivariate analysis, Aphananthe monoica, Pleuranthodendron lindenii, Psychotria costivenia.
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