Genetic structure of the endemic Papaver occidentale indicates survival and immigration in the Western Prealps
- PDF / 1,568,898 Bytes
- 12 Pages / 595.276 x 790.866 pts Page_size
- 22 Downloads / 159 Views
ORIGINAL ARTICLE
Genetic structure of the endemic Papaver occidentale indicates survival and immigration in the Western Prealps Loïc Pittet1 · Yann Fragnière1 · Sandra Grünig2 · Sébastien Bétrisey1,3 · Benoît Clément1 · Emanuel Gerber3 · Michał Ronikier4 · Gregor Kozlowski1,3 · Christian Parisod2 Received: 5 March 2020 / Accepted: 2 July 2020 © The Author(s) 2020
Abstract Climatic oscillations of the Quaternary rapidly compelled plant species to shift their geographical range. How alpine plant species responded to climate change, however, remains elusive and remnants of the cold-adapted flora that currently strive in restricted ranges as small, isolated populations have been particularly overlooked. To address the evolutionary history of such a ‘glacial relict’, we here sampled and genotyped all known native populations of a narrow endemic species from the northwestern Alps, Papaver occidentale, as well as closely related taxa with double digest restriction-site Associated DNA (ddRAD) sequencing. Spatial patterns of genetic variation across populations coupled with insights from climatic niche modelling through time address underpinings of the long-term persistence of the species in face of climate changes. Evidence from population genetics and ecological modelling indicates that P. occidentale likely persisted through the last glacial maximum outside of the Western Prealps and that a major lineage recolonized the area from lower elevation, external regions. Differentiated lineages at the Northern margins of the species distribution range highlight highly divergent and geographically restricted populations that include considerable share of private markers and may indicate local glacial survival in isolated conditions. Our data thus imply that processes having shaped intraspecific spatial genetic structure within the Alps can be complex and lead to mosaic of populations with a mixed-history of local survival and immigration. A better understanding of spatio-temporal aspects of range contraction–expansion is crucial to shed light on processes underlying the evolution of remnant populations of such endemic species and set conservation priorities considering current climate changes. Keywords Arctic-alpine flora · Conservation biology · ddRAD sequencing · Narrow endemic species · Papaver alpinum species complex · Refugia during last glacial maximum
Introduction Climatic oscillations of the Quaternary rapidly compelled species to shift their geographical range (Hewitt 2004), especially in the alpine regions that were heavily glaciated during cold periods such as the last glacial maximum (LGM) some 22,000 years ago (Schonswetter et al. 2005). How plant species react to climate change, however, Gregor Kozlowski and Christian Parisod shared-last authorship. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s00035-020-00238-3) contains supplementary material, which is available to authorized users. * Christian Parisod [email protected] Extended author infor
Data Loading...
