Regeneration of Carnegiea gigantea (Cactaceae) since 1850 in three populations in the northern Sonoran Desert

@article{Drezner2006RegenerationOC,
  title={Regeneration of Carnegiea gigantea (Cactaceae) since 1850 in three populations in the northern Sonoran Desert},
  author={Taly Dawn Drezner},
  journal={Acta Oecologica-international Journal of Ecology},
  year={2006},
  volume={29},
  pages={178-186}
}
  • T. Drezner
  • Published 1 March 2006
  • Environmental Science
  • Acta Oecologica-international Journal of Ecology
The keystone saguaro (Carnegiea gigantea, Cactaceae): a review of its ecology, associations, reproduction, limits, and demographics
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
Variability in reproductive effort of a keystone species: age and height of branch establishment
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TLDR
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Regional Branching Relationships in Carnegiea gigantea, A Keystone Cactus
TLDR
A significant relationship in peaks and troughs is detected between the 2 very different populations, suggesting a regional influence over branching that extends beyond a population or local area.
Saguaro (Carnegiea Gigantea) Densities and Reproduction Over the Northern Sonoran Desert
TLDR
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Variation in age and height of onset of reproduction in the saguaro cactus (Carnegiea gigantea) in the Sonoran Desert
TLDR
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The interaction of drought and habitat explain space-time patterns of establishment in saguaro (Carnegiea gigantea).
TLDR
Saguaro establishment was best explained by the interaction of drought and habitat type; establishment in bajada and foothill plots dropped to near-zero under the most severe periods of water limitation but remained higher in slope plots during the same time span, and data suggest that the most suitable habitat type for saguaroestablishment shifted to higher elevations during the time span of the recent drought.
Episodic recruitment in the saguaro cactus is driven by multidecadal periodicities.
TLDR
It is found that saguaros rely on multidecadal periodic pulses of good beneficial years to incorporate new individuals into their populations with periodicities of 20-30 years possibly related to strong El Niño Southern Oscillation events.
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References

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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
Saguaro (Carnegiea gigantea, Cactaceae) age-height relationships and growth: the development of a general growth curve.
  • T. Drezner
  • Environmental Science
    American journal of botany
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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.
Demographic patterns of Ferocactus cylindraceus in relation to substrate age and grazing history
TLDR
Three subpopulations of Ferocactus cylindraceus, a short-columnar cactus of the Sonoran and Mojave deserts, were sampled in Grand Canyon, Arizona, USA, at sites representing a range of substrate ages and different grazing histories, indicating that as for many woody plants in arid regions, somewhat unusual climatic conditions are necessary if populations are to replace themselves.
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TLDR
Elasticity analysis showed that survivorship was the most important life-history parameter to the finite rate of increase and the critical stages of the life cycle that were related to the biotic interactions occurring during these stages.
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Natural Areas Journal 20.197-200 ABSTRACT: Four sites in the state of Baja California Sur, Mexico, support superb stands of the giant columnar cardon cactus (Pachycereus pringlei [S. Wats] Britt. &
Climatic Effects on Regeneration Trends for Two Columnar Cacti in the Northern Sonoran Desert
Abstract A traditional perception of desert vegetation is one of relatively slow change in a consistently harsh environment. More recent studies of population dynamics and paleoenvironmental
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