Pouncey, Dakota , Willyard, Ann .
Investigating the biogeography of Pinus ponderosa var. scopulorum through the use of microsatellite genotype data and ecological niche models.
Rocky Mountain ponderosa pine (Pinus ponderosa var. scopulorum Engelm.; Pinaceae) occupies a large geographic distribution in western North America. It has been suggested that the isolated ponderosa pine populations in the Black Hills are unique, that the pines of the northern plains are distinct, and that the pines of the southern Rocky Mountains be segregated as P. ponderosa var.brachyptera (Engelm.). We collected samples from 10 populations across the range and used multi-locus nuclear and plastid microsatellite (SSR) genotypes from about 25 individuals per population to visualize patterns among these populations. We also used Ecological Niche Models based on19 biologically meaningful climate variables to infer the uniqueness of habitats occupied by putative taxa. Genetic patterns and ecological niche results provide independent criteria to test support for species delimitation for four alternative hypotheses: i) Black Hills ponderosa pine is distinct; ii) the ponderosa pines of the Black Hills and the northern plains are distinct from P. ponderosa var. scopulorum in the remainder of the northern Rocky Mountains; iii) P. ponderosa var. scopulorum is homogeneous across all of the northern Rocky Mountains but distinct from P. ponderosa var. brachyptera in the southern Rocky Mountains; or iv) P. ponderosa var. scopularum is homogeneous across its range.
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1 - Hendrix College, Biology Dept., 1600 Washington Ave, Conway, AR, 72032, USA
2 - Hendrix College, Biology Dept, 1600 Washington Ave, Conway, AR, 72032, USA
ecological niche models
Presentation Type: Poster:Posters for Sections
Location: Battelle South/Convention Center
Date: Monday, July 9th, 2012
Time: 5:30 PM