Geographical origins, migration patterns and refugia of <i>Sibbaldia procumbens</i>, an arctic–alpine plant with a fragmented range

Allen, Geraldine A.; Marr, Kendrick L.; McCormick, Laurie J.; Hebda, Richard J.

doi:10.1111/jbi.12543

Cited by 24 publications

(36 citation statements)

References 60 publications

(91 reference statements)

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“…Similar patterns of divergent southern populations are found in many other arctic-alpine plant species, e.g. Ranunculus glacialis (Schönswetter, Paun, Tribsch, & Niklfeld, 2003), Arabis alpina (Koch et al, 2006), Oxyria digyna (Allen, Marr, McCormick, & Hebda, 2012), Saxifraga oppositifolia (Winkler et al, 2012) and Sibbaldia procumbens (Allen, Marr, McCormick, & Hebda, 2015).…”

Section: Other Refugia and Postglacial Contact Zonessupporting

confidence: 67%

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Population genomic evidence for plant glacial survival in Scandinavia

et al. 2019

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Quaternary glaciations have played a major role in shaping the genetic diversity and distribution of plant species. Strong palaeoecological and genetic evidence supports a postglacial recolonization of most plant species to northern Europe from southern, eastern and even western glacial refugia. Although highly controversial, the existence of small in situ glacial refugia in northern Europe has recently gained molecular support. We used genomic analyses to examine the phylogeography of a species that is critical in this debate. Carex scirpoidea Michx subsp. scirpoidea is a dioecious, amphi‐Atlantic arctic–alpine sedge that is widely distributed in North America, but absent from most of Eurasia, apart from three extremely disjunct populations in Norway, all well within the limits of the Weichselian ice sheet. Range‐wide population sampling and variation at 5,307 single nucleotide polymorphisms show that the three Norwegian populations comprise unique evolutionary lineages divergent from Greenland with high between‐population divergence. The Norwegian populations have low within‐population genetic diversity consistent with having experienced genetic bottlenecks in glacial refugia, and host private alleles that probably accumulated in long‐term isolated populations. Demographic analyses support a single, pre‐Weichselian colonization into Norway from East Greenland, and subsequent divergence of the three populations in separate refugia. Other refugial areas are identified in North‐east Greenland, Minnesota/Michigan, Colorado and Alaska. Admixed populations in British Columbia and West Greenland indicate postglacial contact. Taken together, evidence from this study strongly indicates in situ glacial survival in Scandinavia.

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Section: Other Refugia and Postglacial Contact Zonessupporting

confidence: 67%

“…Dunlop () hypothesized a cryptic LGM refugium in British Columbia or south of the ice in the Cordilleran Ecoregion, and several other studies of tundra plant species have found unique haplotypes in British Columbia (e.g. Allen et al, ; Allen et al, ; Guest & Allen, ; Marr, Allen, Hebda, & McCormick, ).…”

Section: Discussionmentioning

confidence: 99%

Population genomic evidence for plant glacial survival in Scandinavia

et al. 2019

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“…(2004) and plant material and AFLP data for S. procumbens has previously also been published in Allen et al . (2015) and Alsos et al .…”

Section: Methodsmentioning

confidence: 98%

Living on the edge: Conservation genetics of seven thermophilous plant species in a High Arctic archipelago

et al. 2017

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Small and peripheral populations often contain low levels of genetic variation. This may limit their ability to adapt to environmental change, including climate warming. In a recent study published in AoB PLANTS, Birkeland, Skjetne and colleagues show that many rare and threatened plant species in the High Arctic archipelago Svalbard harbour low levels of genetic variation. Most of them are probably relicts from the early Holocene warmer period. They have likely experienced strong genetic founder/bottleneck effects due to climatic limitations. Even though temperatures now are rising, it is highly uncertain whether this will be beneficial for these warmth-demanding species.

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“…The major patterns we see in the complex—persistence to the south of the ice sheets with climate refugia in the Rockies and at least two regions of the Cascade‐Sierra axis—are shared by other taxa in the region (e.g., Allen, Marr, McCormick, & Hebda, ; Gugger & Sugita, ; Gugger et al., ). However, we find no support for survival in Beringia, in nunataks, or the ice‐free corridor, whereas ample evidence exists for other taxa (e.g., Abbott & Comes, ; Alsos, Engelskjøn, Gielly, Taberlet, & Brochmann, ; Beatty & Provan, ; Godbout et al., ; Marr, Allen, Hebda, & McCormick, ).…”

Section: Discussionmentioning

confidence: 92%

Dated phylogeography of western North American subalpine marshmarigolds (Caltha spp., Ranunculaceae): Miocene–Pliocene divergence of hexaploids, multiple origins of allododecaploids during the Pleistocene, and repeated recolonization of Last Glacial Maximum glaciated regions

Wefferling

Hoot

2018

Journal of Biogeography

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Aim In order to understand how a montane polyploid species complex responded to Cenozoic mountain uplift and climate change, we reconstructed the biogeographic history of the subalpine marshmarigold polyploid complex, including Caltha biflora, Caltha chionophila and Caltha leptosepala. Phylogenies at multiple taxonomic levels were used to estimate the timing of species divergence, allopolyploid formation and migration patterns, and to identify Last Glacial Maximum (LGM) refugia and recolonization routes. Location Western North America. Methods A fossil‐calibrated chronogram was estimated for the eudicot order Ranunculales that was in turn used to set age priors on genus‐level Caltha phylogenies. Nuclear ribosomal and chloroplast DNA sequence data were collected from subalpine marshmarigolds, including 161 specimens from across the geographical range of the complex. The datasets were analysed under a strict or relaxed molecular clock and a structured coalescent model of evolution estimated under a Bayesian framework. Results Hexaploids C. biflora and Caltha chionophila diverged in the Upper Miocene to Lower Pleistocene (chloroplast and nuclear dataset estimates overlapping at the Miocene–Pliocene boundary), and upon secondary contact formed allododecaploid C. leptosepala bidirectionally and at least three times. The hexaploids persisted to the south of LGM icesheets and recolonized LGM glaciated regions in multiple waves, mainly from the C. biflora clade in the Cascades and Coast Ranges. Main conclusions This study of a widespread western North American plant lineage shows a complex response to past geological and climatic changes, with multiple refugia, allopolyploidization events, and migrations during the Pleistocene. Bidirectional allododecaploid formation has resulted in cryptic lineages, some of which (C. leptosepala in the Cascades and Coast Ranges) have been more successful at reclaiming glaciated regions than others (C. leptosepala in the Northern Rockies).

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Geographical origins, migration patterns and refugia of Sibbaldia procumbens, an arctic–alpine plant with a fragmented range

Cited by 24 publications

References 60 publications

Population genomic evidence for plant glacial survival in Scandinavia

Population genomic evidence for plant glacial survival in Scandinavia

Living on the edge: Conservation genetics of seven thermophilous plant species in a High Arctic archipelago

Dated phylogeography of western North American subalpine marshmarigolds (Caltha spp., Ranunculaceae): Miocene–Pliocene divergence of hexaploids, multiple origins of allododecaploids during the Pleistocene, and repeated recolonization of Last Glacial Maximum glaciated regions

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