Recent Topics Posters
Spatz, Kevin , Willyard, Ann .
Investigating the taxonomic status of ponderosa pine from the Spring and Hualapai Mountains.
Pinus ponderosa is a taxonomically puzzling species. This is because isolated populations may be in the early stages of speciation. It has been suggested that isolated populations of P. ponderosa from the Spring Mountains in southeastern Nevada and the Hualapai Mountains in northwestern Arizona have some unique morphological characteristics. However, none of these traits are diagnostic. This complicates the issue of whether or not these populations deserve classification as unique taxa. If they are in fact newly emerged species,then they may be considered endangered. To test for uniqueness, we compared the genetics of population samples from the Spring and Hualapai Mountains to P. ponderosa var. pacifica, to P. ponderosa var.scopulorum, and to the southwest form of ponderosa pine.Chloroplast and nuclear SSRs were genotyped for 25 individuals in each of 10 populations. We also used MaxEnt to create Species Distribution Models based on climate and soil variables for these isolated populations. The inferred geographic distributions were used to evaluate the distinctiveness of each putatively unique taxon. We discuss the implications of results from both analyses in regards to the taxonomic status of these populations of P. ponderosa.
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1 - Hendrix College, Biology Dept, 1600 Washington Ave, Conway, AR, 72032, USA
Presentation Type: Recent Topics Poster
Location: Battelle South/Convention Center
Date: Monday, July 9th, 2012
Time: 5:30 PM