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Abstract Detail


Hansen, Kimberly [1], Ayers, Tina [2].

Testing biogeographic hypotheses in the tropical Andes using Lysipomia (Campanulaceae).

The genus Lysipomia Kunth (Campanulaceae), comprised of over 50 species, is endemic to the high elevation tundra-like communities in the Andes of South America called paramo and puna. These ecosystems, at 3000-5000 m elevation, are characterized by an abundance of rainfall, high winds, and cool to cold temperatures. Areas at lower latitudes have extreme diurnal temperature cycles that may vary as much as 25°C from day to night. As a high elevation endemic that cannot compete with dense vegetation just downslope, the species of Lysipomia are excellent subjects to study biogeographic questions. We used entire plastomes to address whether the major clades have speciated south to north as habitats above 3000 meters became available or whether speciation events are more likely the result of localized or regional vicariant events associated with habitat fragmentation during Pleistocene glacial events. Adjacent high elevation sites on either side of steep inter-Andean valleys were compared to the Huancabamba Depression to discern which one was a more important driver of vicariance between closely related species.

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1 - Washington State University, School Of Biological Sciences, Washington State University, PO Box 644236, Pullman, WA, 99164, United States
2 - Northern Arizona University, Biological Sciences, 617 South Beaver Street, Flagstaff, AZ, 86011, United States


Presentation Type: Oral Paper
Session: SYS3, Systematics III: Asterids part 2
Location: Tucson G/Starr Pass
Date: Wednesday, July 31st, 2019
Time: 4:45 PM
Number: SYS3013
Abstract ID:1039
Candidate for Awards:None

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