Title

Binary Volume Phase Masks In Photo-Thermo-Refractive Glass

Keywords

Conservation; Globular cacti; Integral projection model; Mexico; Sensitivity and elasticity; Yucatán

Abstract

The Cactaceae family in Mexico is particularly important because members of this family exhibit a high degree of endemism. Unfortunately, many species of the Cactaceae are threatened or endangered. We employed an integral projection model for studies of the population dynamics of Mammillaria gaumeri, an endemic cactus of the Yucatán characterized by a small population size. The integral projection model provides estimates of the asymptotic growth rate, stable size distribution, reproductive values, and sensitivities and elasticities of the growth rate to changes in vital rates. Nine locations of this species were studied along the Yucatan coast over a 9-year period. Individuals were classified by plant volume. Most population growth rate (λ) values were below unity. The highest elasticity values corresponded to the survival of intermediate size individuals. The percentage of germination in the field was low, and consequently, fecundity values were also low. Reproductive values were observed to increase with plant volume. The stable size distribution of M. gaumeri was skewed toward small individuals. For all years, the kernel showed that individual survival determined the population growth rate. © 2012 The Society of Population Ecology and Springer.

Publication Date

4-1-2012

Publication Title

Optics Letters

Volume

37

Issue

2

Number of Pages

1190-1192

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1364/OL.37.001190

Socpus ID

84859187785 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84859187785

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