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The genetic diversity of eastern North American tree species as related to the extent of their spatial distribution during the Last Glacial Maximum

dc.contributor.advisorThomson, Ashley
dc.contributor.authorTimms, Robin J. P.
dc.date.accessioned2020-05-11T19:46:07Z
dc.date.available2020-05-11T19:46:07Z
dc.date.created2020
dc.date.issued2020
dc.identifier.urihttp://knowledgecommons.lakeheadu.ca/handle/2453/4627
dc.description.abstractThe distribution of boreal and temperate species during the last glacial maximum (LGM) in Eastern North America can have a significant effect on the genetic diversity of present day populations. Here, I modelled the LGM distribution of several keystone deciduous tree species native to northeastern North America. The ecological niche modelling software, Maxent, was used to generate a relative rate of occurrence that was used to infer the probable locations of glacial refugia. These predicted refugia were then validated by paleo-ecological records where available. The genetic variation of each species was assessed by a literature review of previous studies that used allozymes to determine the expected heterozygosity. The area of the refugia were then compared to the expected heterozygosity through a linear regression. The findings of this study indicated no significant relationship (r2 = 0.024) between refugia size and expected heterozygosity. The lack of data on expected heterozygosity likely skewed the results and further studies need to be conducted to correct for this.en_US
dc.language.isoen_USen_US
dc.subjectLast Glacial Maximumen_US
dc.subjectPaleoecologyen_US
dc.subjectGlacial refugiaen_US
dc.subjectPhylogeographyen_US
dc.subjectSpecies distribution modelsen_US
dc.titleThe genetic diversity of eastern North American tree species as related to the extent of their spatial distribution during the Last Glacial Maximumen_US
dc.typeThesisen_US
etd.degree.nameHonours Bachelor of Science in Forestryen_US
etd.degree.levelBacheloren_US
etd.degree.disciplineNatural Resources Managementen_US
etd.degree.grantorLakehead Universityen_US


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