• Publications
  • Influence
Saguaro (Carnegiea gigantea, Cactaceae) age-height relationships and growth: the development of a general growth curve.
  • T. Drezner
  • Environmental Science
    American journal of botany
  • 1 June 2003
TLDR
With this formula and relatively little field sampling, the age of any individual saguaro (whether the individual was sampled or not) in any population can be estimated.
Variation in age and height of onset of reproduction in the saguaro cactus (Carnegiea gigantea) in the Sonoran Desert
  • T. Drezner
  • Environmental Science
    Plant Ecology
  • 11 April 2007
TLDR
Statistical results are robust and significant variations in the onset of reproduction are observed by both age and height across the four sites, which have implications for regeneration, particularly in marginal locales where regeneration is already limited.
A test of the relationship between seasonal rainfall and saguaro cacti branching patterns
Reproductive output, as well as photosynthetically active radiation interception and CO 2 uptake, increase as saguaro cacti Carnegiea gigantea (Engelm.) Britt. and Rose branch, and branching
Climatic Controls of Saguaro (Carnegiea Gigantea) Regeneration: A Potential Link With El Niño
Saguaro cacti establish periodically in cohorts during years that are climatically favorable. Determining the establishment year is complicated by age-height relationships that vary considerably from
A Remedy for the Overzealous Bonferroni Technique for Multiple Statistical Tests
TLDR
A simple approach is proposed, which is term the correlated Bonferroni technique, to rectify this shortcoming, which reduces rejection of significant results.
Saguaro (Carnegiea Gigantea) Densities and Reproduction Over the Northern Sonoran Desert
TLDR
The partial correlation results suggest that high saguaro densities are linked with high quality nurse cover in addition to summer rainfall, and total cover and mean annual precipitation are the best predictors of reproductive stem density.
The Population Dynamics of Columnar and Other Cacti: A Review
In this article, we review the population cycles of cacti, with an emphasis on the large, often keystone columnar cacti of the North American deserts. These and many other cacti often experience
The keystone saguaro (Carnegiea gigantea, Cactaceae): a review of its ecology, associations, reproduction, limits, and demographics
  • T. Drezner
  • Environmental Science
    Plant Ecology
  • 10 April 2014
This paper reviews the basics of a Sonoran Desert keystone cactus species, including the ecology of its establishment and high mortality, its association with nurse plants to provide ameliorated
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