uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
The Pleistocene demography of an alpine juniper of the Qinghai-Tibetan Plateau: tabula rasa, cryptic refugia or something else?
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Plant Ecology and Evolution.
Show others and affiliations
2011 (English)In: Journal of Biogeography, ISSN 0305-0270, E-ISSN 1365-2699, Vol. 38, no 1, 31-43 p.Article in journal (Refereed) Published
Abstract [en]

Aim Numerous palaeoecological and genetic studies have shown that different tree species responded in very different ways to Pleistocene climatic oscillations. Some were forced into small refugia far from their current range, while others were able to survive in small refugia close to, or even within, their current natural range. In this study we examine the Pleistocene demography of a juniper species (Juniperus przewalskii, Cupressaceae) from the Qinghai-Tibetan Plateau. Location The Qinghai-Tibetan Plateau (QTP). Methods Eight nuclear loci were sequenced in 141 individuals from 20 natural populations distributed across the entire natural range of J. przewalskii, and coalescent analysis was used to test demographic hypotheses. Results The overall nucleotide diversity in the sample was low (pi(sil) = 0.0029), with few rare alleles and pronounced population genetic structure (F-ST = 0.181). We detected a division previously found using chloroplast DNA markers: all segregating sites in populations from the central part of the QTP appear to be a subset of those found around the edge of the plateau, confirming the relatively young age of the former. In contrast to the middle Pleistocene bottlenecks detected in boreal tree species, the coalescent-based analyses failed to reject the standard neutral model for the juniper species considered here. Main conclusions Juniperus przewalskii did not undergo marked changes in population sizes during the Pleistocene, although this species seems to have experienced recent, post-glacial expansion. This finding is largely consistent with the limited number of previous studies on conifer species of the QTP, but contradicts findings of studies on boreal species. These findings have wide implications for understanding plant species' responses to past climatic oscillations on the high-elevation QTP.

Place, publisher, year, edition, pages
2011. Vol. 38, no 1, 31-43 p.
Keyword [en]
Coalescent tests, demographic history, Juniperus przewalskii, nucleotide variation, Qinghai-Tibetan Plateau, refugia
National Category
Biological Sciences
URN: urn:nbn:se:uu:diva-143668DOI: 10.1111/j.1365-2699.2010.02400.xISI: 000285300500004OAI: oai:DiVA.org:uu-143668DiVA: diva2:390977
Available from: 2011-01-24 Created: 2011-01-24 Last updated: 2016-04-22Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text
By organisation
Plant Ecology and Evolution
In the same journal
Journal of Biogeography
Biological Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 123 hits
ReferencesLink to record
Permanent link

Direct link