Chloroplast haplotype diversity patterns in<i>Packera pauciflora</i>(Asteraceae) are affected by geographical isolation, hybridization, and breeding system

Bain, John; Golden, Joanne L.

doi:10.1139/b05-063

Cited by 7 publications

(5 citation statements)

References 30 publications

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“…This is in contrast to the isolation of Cascades‐Sierra Nevada lineages from the Rocky Mountain lineages in the mountain chickadee (Spellman et al. 2007), the subalpine plant Packera (Bain & Golden 2005), and in the whitebark‐pine (Richardson et al. 2002).…”

Section: Discussionmentioning

confidence: 80%

Alpine biogeography of Parnassian butterflies during Quaternary climate cycles in North America

Schoville

Roderick

2009

Molecular Ecology

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Growth of alpine glaciers during the Pleistocene had profound effects on montane landscapes in North America and the organisms now inhabiting alpine ecosystems. Biogeography of this region has often been viewed as a system of sky islands despite the fact that species richness patterns deviate from a strict island biogeographic model. One explanation is that alpine species are not in equilibrium because of late Quaternary geographic range shifts. Genetic data can provide evidence of nonequilibrium dynamics and the distributional shifts that occur during glaciation events in alpine landscapes. Using mitochondrial and nuclear sequence data, we examine the evolutionary history of butterflies in the Parnassius phoebus complex. We test explicit, alternative models of the biogeographic history of Parnassius smintheus and Parnassius behrii, including an equilibrium island model, ancestral radiation and fragmentation, an expanding alpine archipelago and an alpine archipelago refuge model. Our results support the alpine archipelago refuge model, in which alpine butterflies undergo population contraction during glacial climates followed by population expansion during interglacial phases. While butterflies can disperse between distant mountain ranges during glacial periods, gene flow is rare. We find evidence of recent connectivity between California and Colorado, population expansion events following deglaciation approximately 20,000 years B.P., and small population sizes during the last glacial period. An analysis of lineage splitting suggests that morphological differences in P. smintheus and P. behrii are the result of late Pleistocene divergence (approximately 48,000 years B.P.) with limited gene flow. Our results demonstrate that spatially complex and nonequilibrium population dynamics influence alpine diversity patterns.

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Section: Discussionmentioning

confidence: 80%

Alpine biogeography of Parnassian butterflies during Quaternary climate cycles in North America

Schoville

Roderick

2009

Molecular Ecology

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“…2001; Richardson et al. 2002; Bain & Golden 2005; Jarvis & Whiting 2006; Spellman et al. 2007; Schoville & Roderick 2010).…”

Section: Discussionmentioning

confidence: 99%

Pleistocene origin and population history of a neoendemic alpine butterfly

2011

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Alpine environments underwent dramatic transformation during glacial-interglacial cycles, with the consequence that geographical, ecological and demographic changes of alpine populations provided the opportunity for formation of neoendemic species. Several biogeographical models have been proposed to account for the unique history of alpine populations, with different expectations of genetic divergence and speciation. The expanding alpine archipelago model proposes that alpine populations expand spatially and demographically during glacial events, dispersing between mountain ranges. Under this model, alpine populations are unlikely to diverge in isolation due to substantial interpopulation gene flow. In contrast, the alpine archipelago refuge model proposes that gene flow during glacial phases is limited and populations expand demographically during interglacial phases, increasing genetic isolation and the likelihood of speciation. We assess these models by reconstructing the evolutionary history of Colias behrii, a morphologically and ecologically distinct alpine butterfly restricted to the California Sierra Nevada. C. behrii exhibits very low genetic diversity at mitochondrial and nuclear loci, limited population structure and evidence of population expansion. C. behrii and Rocky Mountain C. meadii share identical mitochondrial haplotypes, while in contrast, nuclear data indicate common ancestry between C. behrii and Cascades Range Colias pelidne. The conflict in gene genealogies may be a result of recent expansion in North American Colias, but an isolation with migration analysis indicates that genetic patterns in C. behrii might result from differential introgression following hybridization. Based on the timing of population expansion and gene flow between mountain ranges, the expanding alpine archipelago model is supported in C. behrii.

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“…The history of the tundra floras of the northern hemisphere has been much more extensively investigated in Europe than in North America. In particular, phylogeographic studies of arctic–alpine plants with a focus on western North America are still relatively few ( Jorgensen et al 2003 ; Bain and Golden 2005 ), and the contributions of refugia hypothesized for this region (especially cryptic refugia) are not well understood. In a previous study ( Marr et al 2008 ), we used restriction fragment analysis to identify patterns of genetic diversity in western North American populations of Oxyria digyna in relation to recent glacial history and the locations of refugia.…”

Section: Introductionmentioning

confidence: 99%

The impact of Pleistocene climate change on an ancient arctic–alpine plant: multiple lineages of disparate history in Oxyria digyna

Allen

Marr

McCormick

et al. 2012

Ecology and Evolution

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The ranges of arctic–alpine species have shifted extensively with Pleistocene climate changes and glaciations. Using sequence data from the trnH-psbA and trnT-trnL chloroplast DNA spacer regions, we investigated the phylogeography of the widespread, ancient (>3 million years) arctic–alpine plant Oxyria digyna (Polygonaceae). We identified 45 haplotypes and six highly divergent major lineages; estimated ages of these lineages (time to most recent common ancestor, TMRCA) ranged from ∼0.5 to 2.5 million years. One lineage is widespread in the arctic, a second is restricted to the southern Rocky Mountains of the western United States, and a third was found only in the Himalayan and Altai regions of Asia. Three other lineages are widespread in western North America, where they overlap extensively. The high genetic diversity and the presence of divergent major cpDNA lineages within Oxyria digyna reflect its age and suggest that it was widespread during much of its history. The distributions of individual lineages indicate repeated spread of Oxyria digyna through North America over multiple glacial cycles. During the Last Glacial Maximum it persisted in multiple refugia in western North America, including Beringia, south of the continental ice, and within the northern limits of the Cordilleran ice sheet. Our data contribute to a growing body of evidence that arctic–alpine species have migrated from different source regions over multiple glacial cycles and that cryptic refugia contributed to persistence through the Last Glacial Maximum.

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Chloroplast haplotype diversity patterns inPackera pauciflora(Asteraceae) are affected by geographical isolation, hybridization, and breeding system

Cited by 7 publications

References 30 publications

Alpine biogeography of Parnassian butterflies during Quaternary climate cycles in North America

Alpine biogeography of Parnassian butterflies during Quaternary climate cycles in North America

Pleistocene origin and population history of a neoendemic alpine butterfly

The impact of Pleistocene climate change on an ancient arctic–alpine plant: multiple lineages of disparate history in Oxyria digyna

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