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Abstract Detail



Conservation Biology

Brabazon, Holly [1], Johnson, Leigh [1].

Taxonomic delimitation of a rare, paleoendemic plant: Historical phylogeography of Cycladenia humilis (Apocynaceae).

Taxonomic delimitation of rare species is vital for effective conservation efforts and accurate assessments of diversity. Cycladenia humilis, the sole species of Cycladenia, is an enigmatic perennial widely dispersed across the western United States. Within the species there are three currently recognized taxonomic subspecies, with C. humilis var. humilis in Northern California, C. humilis var. venusta in Southern California, and C. humilis var. jonesii in Utah and Northern Arizona. Several populations are located in areas intermediate to subspecies boundaries, and the current taxonomic treatment fails to accurately address these populations. Using five nrDNA regions we seek to clarify relationships between the subspecies and infer a phylogeographic history of the entire species. Analyses including AMOVA, fields for recombination, and Principle Coordinate Analysis were applied. Results indicate significant genetic structure between subspecies, and clarify relationships among the populations of interest. Metapopulation clusters consistently revealed across gene regions indicate evolutionary units that merit taxonomic recognition. These data inform currently operating conservation efforts and offer insights into the historical demography of Cycladenia.


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1 - Brigham Young University, Biology, 4102 Lsb, Provo, Ut, 84602, Usa

Keywords:
Phylogeography
rare plant
Apocynaceae
Species delimitation.

Presentation Type: Poster:Posters for Topics
Session: P
Location: Hall D/The Shaw Conference Centre
Date: Monday, July 27th, 2015
Time: 5:30 PM
Number: PCB002
Abstract ID:696
Candidate for Awards:None


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