Ice ages leave genetic diversity ‘hotspots’ in Europe but not in Eastern North America

After the last glacial cycle, temperate European trees migrated northward, experiencing genetic bottlenecks and founder effects, which left high haplotype endemism in southern populations and clines in genetic diversity northward. These patterns are thought to be ubiquitous across temperate forests,...

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Bibliographic Details
Published inEcology letters Vol. 20; no. 11; pp. 1459 - 1468
Main Authors Lumibao, Candice Y., Hoban, Sean M., McLachlan, Jason, Coulson, Tim
Format Journal Article
LanguageEnglish
Published England Blackwell Publishing Ltd 01.11.2017
Subjects
Chloroplast DNA
Climate Change
Clines
Continents
Datasets
Deoxyribonucleic acid
DNA
Eastern North America
Endemism
Europe
Genetic diversity
Genetic Variation
Glaciation
Haplotypes
Ice
Ice ages
Microsatellite Repeats
North America
Phylogeography
Population genetics
post‐glacial colonisation
Quaternary
Quaternary period
range shifts
Taxa
Temperate forests
Trees - classification
Trees - genetics
Trees - physiology
North America
genetic diversity
post-glacial colonisation
range shifts
Europe
Quaternary period
Eastern North America
phylogeography
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Summary:After the last glacial cycle, temperate European trees migrated northward, experiencing genetic bottlenecks and founder effects, which left high haplotype endemism in southern populations and clines in genetic diversity northward. These patterns are thought to be ubiquitous across temperate forests, and are therefore used to anticipate the potential genetic consequences of future warming. We compared existing and new phylogeographic data sets (chloroplast DNA) from 14 woody taxa in Eastern North America (ENA) to data sets from 21 ecologically similar European species to test for common impacts of Quaternary climate swings on genetic diversity across diverse taxa and between continents. Unlike their European counterparts, ENA taxa do not share common southern centres of haplotype endemism and they generally maintain high genetic diversity even at their northern range limits. Differences between the genetic impacts of Quaternary climate cycles across continents suggest refined lessons for managing genetic diversity in today's warming world.
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ISSN:1461-023X
1461-0248
DOI:10.1111/ele.12853