Hybridization as a threat in climate relict Nuphar pumila (Nymphaeaceae)

Details

Serval ID
serval:BIB_8BA0E24D91FE
Type
Article: article from journal or magazin.
Collection
Publications
Title
Hybridization as a threat in climate relict Nuphar pumila (Nymphaeaceae)
Journal
Biodiversity and Conservation
Author(s)
Arrigo N., Bétrisey S., Graf L., Bilat J., Gerber E., Kozlowski G.
ISSN
1572-9710
ISSN-L
0960-3115
Publication state
Published
Issued date
2016
Peer-reviewed
Oui
Volume
25
Number
10
Pages
1863-1877
Language
english
Abstract
Field studies and conceptual work on hybridization-mediated extinction risk in climate relicts are extremely rare. Nuphar pumila (Nymphaeaceae) is one of the most emblematic climate relicts in Europe with few isolated populations in the Alpine arc. The extent of introgression with related lowland and generalist species Nuphar lutea has never been studied using molecular methods. All biogeographical regions where N. pumila naturally occurs in the neighbourhood of the Alpine arc were sampled and studied using nuclear microsatellite markers. Furthermore, we used forward-in-time simulations and Approximate Bayesian Computation to check whether an introgression scenario fits with the observed admixture patterns and estimated the demographic parameters associated with this process. Our study confirms ongoing hybridization between N. pumila and N. lutea and validates it by the use of population models. More than 40 % of investigated N. pumila individuals were admixed and hybrids were found in over 60 % of studied populations. The introgression is bidirectional and is most likely a result of very recent gene flow. Our work provides strong evidence for rapid extinction risk and demographic swamping between specialized climatic relicts and closely related generalists. The remaining pure populations of N. pumila are rare in the Alpine arc and deserve high conservation priority.
Keywords
Boreal geoelement, Hybridization-mediated extinction, Introgression, Nuphar lutea, Nuphar pumila, Refugia
Web of science
Create date
07/06/2016 9:44
Last modification date
20/08/2019 15:50
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