| dc.contributor.advisor | thomson, ashley | |
| dc.contributor.author | timms, robin j. p. | |
| dc.date.accessioned | 2020-05-11t19:46:07z | |
| dc.date.available | 2020-05-11t19:46:07z | |
| dc.date.created | 2020 | |
| dc.date.issued | 2020 | |
| dc.identifier.uri | http://knowledgecommons.lakeheadu.ca/handle/2453/4627 | |
| dc.description.abstract | the 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.iso | en_us | en_us |
| dc.subject | last glacial maximum | en_us |
| dc.subject | paleoecology | en_us |
| dc.subject | glacial refugia | en_us |
| dc.subject | phylogeography | en_us |
| dc.subject | species distribution models | en_us |
| dc.title | the genetic diversity of eastern north american tree species as related to the extent of their spatial distribution during the last glacial maximum | en_us |
| dc.type | thesis | en_us |
| etd.degree.name | honours bachelor of science in forestry | en_us |
| etd.degree.level | bachelor | en_us |
| etd.degree.discipline | natural resources management | en_us |
| etd.degree.grantor | 阿根廷vs墨西哥竞猜
| en_us |
