Metzgar, Jordan , Ickert-Bond, Stefanie M. .
Developing the parsley ferns (Cryptogramma) as a system for studying rapid climate change in seed free plants.
The parsley ferns (Cryptogramma) make an excellent candidate for testing hypotheses of colonization following the Last Glacial Maximum (LGM). Thanks to their minute and easily dispersed spores, these rock-loving ferns could have utilized refugia to rapidly and repeatedly colonize deglaciated landscapes, or they could have survived in situ on nunataks. Herbarium specimens indicate that Cryptogramma survives today on nunataks, but cannot answer whether this was the sole recolonization source used following the LGM or if recolonization from refugia also played a complementary or dominant role. By first generating well-resolved and robustly supported hypotheses of species relationships of the genus, we place the North American taxa in a phylogenetic context and answer lingering questions regarding (1) the origin of allopolyploid taxa and (2) if these taxa were formed when previous climate conditions forced currently allopatric parental taxa into close proximity. Field work throughout northwestern North America sampled numerous populations and haplotype network analyses of these specimens reveal the contributions and locations of glacial refugia for Cryptogramma during the LGM. Ecological niche modeling will allow us to project these future range shifts under a variety of climate scenarios and determine if polyploid species possess a lower extinction probability than diploid species.
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1 - University Of Alaska Fairbanks, Museum Of The North, 907 Yukon Drive, Fairbanks, AK, 99775, USA
2 - University of Alaska, UA Museum of the North Herbarium & Dept. of Biology and Wildlife, 907 Yukon Dr., Fairbanks, Alaska, 99775, USA
Last Glacial Maximum
Ecological niche modeling
Presentation Type: Poster:Posters for Sections
Location: Khorassan Ballroom/Chase Park Plaza
Date: Monday, July 11th, 2011
Time: 5:30 PM