Addressing alpine plant phylogeography using integrative distributional, demographic and coalescent modeling

Larsson, Dennis J.; Pan, Da; Schneeweiss, Gerald M.

doi:10.1007/s00035-021-00263-w

Cited by 7 publications

(5 citation statements)

References 127 publications

(167 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The plastid data itself show that hybridization must have occurred at least twice between these more distantly related alpine alkali grasses. The potential evolutionary scenarios of historical diversification in alpine species could be evaluated within the hypothesis-testing framework of comparative phylogeography ( Papadopoulou and Knowles, 2016 ; Larsson et al., 2022 ). The distribution ranges of both P. pamirica and P. himalaica are not limited to the Pamir Mountains, covering other adjacent regions of High Mountain Asia as well ( Ovchinnikov and Chukavina, 1957 ; Dickoré, 1995 ; Liang et al., 2006 ).…”

Section: Discussionmentioning

confidence: 99%

Hybrids as mirrors of the past: genomic footprints reveal spatio-temporal dynamics and extinction risk of alpine extremophytes in the mountains of Central Asia

Wróbel,

Klichowska,

Nobis

2024

Front. Plant Sci.

View full text Add to dashboard Cite

Hybridization is one of the key processes shaping lineage diversification, particularly in regions that experienced strong climate oscillations. The alpine biome with its rich history of glacial-interglacial cycles and complex patterns of species distribution shifts offers an excellent system to investigate the impact of gene flow on population dynamics and speciation, important issues for evolutionary biology and biodiversity conservation. In this study, we combined genomic data (DArTseq), chloroplast markers, and morphology to examine phylogenetic relationships and the permeability of species boundaries and their evolutionary outcomes among the alpine extremophilic species of Puccinellia (Poaceae) in the Pamir Mountains, a part of the Mountains of Central Asia biodiversity hotspot. We determined the occurrence of interspecific hybrids between P. himalaica and P. pamirica, which demonstrated almost symmetric ancestry from their parental species and did not show signals of introgression. According to our integrative revision, the natural hybrids between P. himalaica and P. pamirica should be classified as Puccinellia ×vachanica (pro species). Using approximate Bayesian computation for population history inference, we uncovered that P. himalaica hybridized with P. pamirica independently in multiple localities over the Holocene. Hybrids inherited the fine-scale genetic structure from their parental species, which developed these patterns earlier, during the Late Pleistocene. Hybridization had different consequences for the involved parental lineages, likely playing an important role in a continuing decline of P. himalaica in the Pamir Mountains over the Holocene. Our results show that P. himalaica should be considered a critically endangered species in the Pamir Mountains and could also be retreating across its entire range of distribution in High Mountain Asia. Using a comparative phylogeographic framework, we revealed the risk of extinction of a cold-adapted alpine species in a global biodiversity hotspot. This study highlights that genomics could unravel diversity trends under climate change and provides valuable evidence for conservation management.

show abstract

Section: Discussionmentioning

confidence: 99%

Hybrids as mirrors of the past: genomic footprints reveal spatio-temporal dynamics and extinction risk of alpine extremophytes in the mountains of Central Asia

Wróbel,

Klichowska,

Nobis

2024

Front. Plant Sci.

View full text Add to dashboard Cite

show abstract

“…To draw firm conclusions on how cycles of isolation and gene flow shaped current patterns of biodiversity in the Alps (Taberlet et al 2012), future work must address the spatial arrangement of glacial refugia promoting isolation and of heterogeneous environments supporting expansion for different plant species and communities. Provided that multi-species integration of ecological and demographic modeling in space and time is now achievable following, e.g., Larsson et al (2021), further work will likely provide key quantitative insights on the impact of the different refugia, especially in the Southern Alps as well as nunataks, on the current distribution of variation within and among communities (e.g., on diverse bedrocks). If based on relatively dense sampling, it will also highlight to what extent local variants have been swamped by expanding lineages.…”

Section: Museums and Cradles Of Biodiversity Across The Alpsmentioning

confidence: 99%

Plant speciation in the face of recurrent climate changes in the Alps

Parisod

2021

Alp Botany

View full text Add to dashboard Cite

The main, continuous mountain range of the European Alpine System (i.e., the Alps) hosts a diversified pool of species whose evolution has long been investigated. The legacy of past climate changes on the distribution of high-elevation plants as well as taxa differentially adapted to the mosaic of edaphic conditions (i.e., surmised ecotypes on calcareous, siliceous, serpentine bedrocks) and the origin of new species are here discussed based on available evidence from endemic taxa across the Alps. The integration of main spatial and ecological patterns within and among species supports speciation driven by spatial isolation in main glacial refugia where plant populations survived during cold phases and hindered by intense gene flow along main expansion pathways during warm phases. Despite patterns of genetic differentiation matching environmental heterogeneity, processes underlying the dynamics of distribution ranges likely promoted recurrent homogenization of incipient divergence and generally hindered the completion of speciation (except for cases of hybrid speciation). Even intense selective pressures on toxic bedrocks such as serpentine seemingly fail to support the completion of speciation. Accordingly, typical scenarios of ecological speciation whereby local adaptation to environmental heterogeneity initiates and supports long-term reduction of gene flow may rarely be at the origin of stable species in the Alps. Although consistent with neutral processes whereby spatial isolation driven by past climate changes promoted reproductive isolation and yielded limited diversification, mechanisms at the origin of new species across heterogeneous landscapes of the Alps remain insufficiently known. Necessary advances to reliably understand the evolution of biodiversity in the Alps and identify possible museums or cradles of variation in face of climate changes are discussed.

show abstract

“…Many plant species have been investigated with regard to their inferred (post)glacial history (e.g., Larsson et al, 2022; Lumibao et al, 2017; Lyman & Edwards, 2022; Marske & Boyer, 2022; Nieto Feliner, 2014), but most such studies relied either on population genetic inference only or on palaeoecological evidence. Tree species are well suited for combining both approaches.…”

Section: Introductionmentioning

confidence: 99%

A range‐wide postglacial history of Swiss stone pine based on molecular markers and palaeoecological evidence

Gugerli

Brodbeck

Lendvay

et al. 2023

Journal of Biogeography

View full text Add to dashboard Cite

Aim Knowing a species' response to historical climate shifts helps understanding its perspectives under global warming. We infer the hitherto unresolved postglacial history of Pinus cembra. Using independent evidence from genetic structure and demographic inference of extant populations, and from palaeoecological findings, we derive putative refugia and re‐colonisation routes. Location European Alps and Carpathians. Taxa Pinus cembra. Methods We genotyped nuclear and chloroplast microsatellite markers in nearly 3000 individuals from 147 locations across the entire natural range of P. cembra. Spatial genetic structure (Bayesian modelling) and demographic history (approximate Bayesian computation) were combined with palaeobotanical records (pollen, macrofossils) to infer putative refugial areas during the Last Glacial Maximum (LGM) and re‐colonisation of the current range. Results We found distinct spatial genetic structure, despite low genetic differentiation even between the two disjunct mountain ranges. Nuclear markers revealed five genetic clusters aligned East–West across the range, while chloroplast haplotype distribution suggested nine clusters. Spatially congruent separation at both marker types highlighted two main genetic lineages in the East and West of the range. Demographic inference supported early separation of these lineages dating back to a previous interstadial or interglacial c. 210,000 years ago. Differentiation into five biologically meaningful genetic clusters likely established during postglacial re‐colonisation. Main Conclusions Combining genetic and palaeoecological evidence suggests that P. cembra primarily survived the LGM in ‘cold period’ refugia south of the Central European Alps and near the Carpathians, from where it expanded during the Late Glacial into its current Holocene ‘warm period’ refugia. This colonisation history has led to the distinct East–West structure of five genetic clusters. The two main genetic lineages likely derived from ancient divergence during an interglacial or interstadial. The respective contact zone (Brenner line) matches a main biogeographical break in the European Alps also found in herbaceous alpine plant species.

show abstract

Addressing alpine plant phylogeography using integrative distributional, demographic and coalescent modeling

Cited by 7 publications

References 127 publications

Hybrids as mirrors of the past: genomic footprints reveal spatio-temporal dynamics and extinction risk of alpine extremophytes in the mountains of Central Asia

Hybrids as mirrors of the past: genomic footprints reveal spatio-temporal dynamics and extinction risk of alpine extremophytes in the mountains of Central Asia

Plant speciation in the face of recurrent climate changes in the Alps

A range‐wide postglacial history of Swiss stone pine based on molecular markers and palaeoecological evidence

Contact Info

Product

Resources

About