Rear‐edge, low‐diversity, and haplotypic uniformity in cold‐adapted Bupleurum euphorbioides interglacial refugia populations

Abstract

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Approximate Bayesian computation and ecological niche models elucidate the demographic history and current fragmented population distribution of a Korean endemic shrub

“…In comparison with other studies that employed the same maximum entropy algorithm on plants with (overlapping) distribution on the KP (Cho et al, 2020;Chung et al, 2018;Jin et al, 2021;Park et al, 2019), the LGM habitat suitability of our focal species appeared to be considerably scaled down to a small area, implying that white forsythia is a less cold-adapted species relative to other Korean taxa investigated (e.g., Cho et al, 2020;Chung et al, 2018). On the other hand, the bioclimatic predictors with the highest importance and contribution to the niche models represent one of the first environmental data that attempt to explain some of the ecological requirements of this deciduous shrub.…”

“…The amount of research work that investigated the paleodistributions of native plants occurring on the KP, however, is still relatively small, especially those that integrated molecular methods in their design. When available, related studies that utilized allozymes (Chung et al., 2018), microsatellites (Jin et al., 2021), or combinations of DNA sequences with microsatellites and single nucleotide polymorphisms (Cho et al., 2020; Park et al., 2019) as markers only attempted to determine genetic variation and structure, but not to directly infer species demographic history. The knowledge gaps in the demographic history of plant species on the KP, hence, remain understudied specifically on the influence of past events on species' current spatial range and organization.…”

The genetic structure and demographic history ofZabelia tyaihyonii, endemic to Korean limestone karst forests, based on genome‐wide SNP markers

“…The degree of gene flow among populations is also considered a primary factor in shaping the population genetic structure (Tamaki et al, 2021 ). Although the relative importance of each factor may spatiotemporally change, the patterns of genetic differentiation observed in the majority of plants reflect historical, rather than current factors, particularly in East Asia (e.g., Cho et al, 2020 ; Han et al, 2020 ; Kikuchi & Osone, 2021 ). The population establishment history with demographic events is also associated with the Quaternary climatic oscillations that periodically affected both habitat fragmentation and connectivity, as well as geographical distribution range (Chung et al, 2017 ; Hewitt, 2000 , 2003 ).…”

“…The limited perspective has hindered our understanding of the diverse behavioral patterns exhibited by various species. To broaden our knowledge, it is essential to investigate the potential vertical movement and other factors of cold‐tolerant temperate plant species within specific areas (Cho et al, 2020 ). Therefore, it may be important to consider what historical distributional changes may have occurred for our target species that have evolved to adapt to limited limestone zones.…”

“…Ecological niche modeling (ENM) provides a powerful framework for investigating the interplay between ecological and evolutionary factors that have contributed to the genetic diversity of populations (Alvarado‐Serrano & Knowles, 2014 ). This approach is particularly useful in understanding the distribution and genetic structure of populations during Quaternary glacial cycles, even at small spatial scales (Cho et al, 2020 ; Jin et al, 2021 ). To shed light on the historical migration patterns of Z. tyaihyonii , we utilized ENM and population modeling techniques, including site frequency spectrum analysis.…”