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Abstract Detail



Biogeography

Drummond, Chloe [1], Sytsma, Kenneth J. [2].

Great Lakes-Western North America Disjuncts: a study on the phylogeography, timing, and climate niche space of three representative lineages.

The disjunct biogeography of North American temperate plants has puzzled botanists for decades. This research takes an integrative approach to analyzing the recurring Great Lakes-western North America disjunct pattern using three species as case studies: Rubus parviflorus Nutt. (Rosaceae, thimbleberry), Aconitum columbianum/noveboracense Nutt. (Ranunculaceae, Columbian or northern monkshood) and Oplopanax horridus (Sm.) Miq. (Araliaceae, devil’s club). The primary characteristic of this distribution is occurrence from Alaska south through the western Rocky Mountains, with reappearance in the Great Lakes region, where these species are often threatened. To arrive at a comprehensive overview of this distribution, the aims of this research are: 1) to address the North American biogeographic history of these species, incorporating time and glacial history, 2) to assess the maintenance of the species’ distributions using climate and ecological niche data, and 3) to place the species’ niche spaces into their wider contexts of family-wide niche evolution. I have analyzed the North American phylogeography and genetic structure of Rubus parviflorus with GBS next-generation sequencing data, using population samples from across its North American range. This addresses the hypotheses of a pre-Pleistocene, western North American-restricted distribution with subsequent eastward dispersal, or alternatively, a pre-Pleistocene, widespread North American distribution with subsequent vicariance. With additional work, this research will illuminate whether parallels can be drawn between these distantly related species in relation to this biogeographic phenomenon.


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1 - University Of Wisconsin-Madison, 430 Lincoln Drive, Madison, WI, 53706, USA
2 - University Of Wisconsin, Department Of Botany, Birge Hall, 430 Lincoln Drive, Madison, WI, 53706, USA

Keywords:
disjunct
Phylogeography
Refugia.

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: PBG010
Abstract ID:1178
Candidate for Awards:None


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