Published November 14, 2022 | Version v1
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Demographic study of a tropical epiphytic orchid with stochastic simulations of hurricanes, herbivory, episodic recruitment, and logging

  • 1. Florida International University
  • 2. The Institute of Ecology and Systematics, National Herbarium of Cuba "Onaney Muñiz"*
  • 3. University of Hawaii at Manoa

Description

In a time of global change, having an understanding of the nature of biotic and abiotic factors that drive a species' range may be the sharpest tool in the arsenal of conservation and management of threatened species. However, such information is lacking for most tropical and epiphytic species due to the complexity of life history, the roles of stochastic events, and the diversity of habitat across the span of a distribution. In this study, we conducted repeated censuses across the core and peripheral range of Trichocentrum undulatum, a threatened orchid that is found throughout the island of Cuba (species core range) and southern Florida (the northern peripheral range). We used demographic matrix modeling as well as stochastic simulations to investigate the impacts of herbivory, hurricanes, and logging (in Cuba) on projected population growth rates (𝜆 and 𝜆s) among sites.

Notes

The following text files were imported and read by R 2.4.4 Software Package using the code script from the R file "Trichocentrum_undulatum_HB"

The text file titled "tricho8yrs_feb25" used for "Part I" and "Part IV" labelled sections of the R script. "Part I" created matrices using the demographic data for each site, census, and plant identification found in the text file. "Part IV" was the transient analysis that projected the short-term dynamics and used the most recent field observations or stage class vector for each population.

The text file "tricho_matrices_nov29" was used for the stochastic simulation of hurricane introduction, logging introduction, episodic recruitment introduction, and scale insect mortality removal at select censuses/populations. The file was used in the "Part II" and "Part III" labelled section in the R script. 

The following text files were imported and read by R 2.4.4 Software Package using the code script from R files "tricho.mark.hur" and "Tricho_markov_hurriane"

The text file "Tricho_markov_hurriane" contains the state of environments for the hurricane probability scenarios.

The text file "tricho.mark.hur" contains the matrices that will be pulled for each phase as described in the above methods "four major transition phases gathered from the Peripheral population censuses: (1) phase I, the hurricane year (census 5); (2) phase II, first year post-hurricane (census 6); (3) phase III, second and third year post hurricane (7 and 8); (4) phase IV, non-hurricane affected years (census 1, 2, 3, and 4) (Table 2; Appendix S1: Table S1)."

Funding provided by: Florida International University
Crossref Funder Registry ID: http://dx.doi.org/10.13039/100007681
Award Number: International Center for Tropical Botany

Funding provided by: Florida International University
Crossref Funder Registry ID: http://dx.doi.org/10.13039/100007681
Award Number: Judith Evans Parker Travel Scholarship

Funding provided by: Florida International University
Crossref Funder Registry ID: http://dx.doi.org/10.13039/100007681
Award Number: Kelly Foundation's Tropical Botany scholarship

Funding provided by: Tinker Foundation
Crossref Funder Registry ID: http://dx.doi.org/10.13039/100006038
Award Number: FIU Latin American and Caribbean Center Tinker Foundation

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Additional details

Related works

Is derived from
10.5061/dryad.vhhmgqnxd (DOI)