Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/19504
Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Genetic variation and population decline of an endangered hoverfly Blera fallax (Diptera: Syrphidae)
Authors: Rotheray, Ellen
Lepais, Olivier
Nater, Alexander
Greminger, Maja P
Krutzen, Michael
Goulson, Dave
Bussiere, Luc
Contact Email: luc.bussiere@stir.ac.uk
Keywords: Syrphid
Pine hoverfly
Microsatellite
Population bottleneck
Population structure
Conservation
Issue Date: Oct-2012
Publisher: Springer
Citation: Rotheray E, Lepais O, Nater A, Greminger MP, Krutzen M, Goulson D & Bussiere L (2012) Genetic variation and population decline of an endangered hoverfly Blera fallax (Diptera: Syrphidae), Conservation Genetics, 13 (5), pp. 1283-1291.
Abstract: Genetic diversity is one of several factors affecting extinction risk in vulnerable populations. In addition to informing conservation management strategies, data on genetic variability can also shed light on the recency and magnitude of historic bottlenecks. The pine hoverfly Blera fallax is one of the rarest invertebrates in the UK, known from just two sites in Scotland. It belongs to an often overlooked, species-rich community that is fundamental to forest function, the saproxylics (that depend on dead wood). To assist current conservation management for B. fallax, including captive breeding and translocations, it is important to know whether genetic factors will limit the success of recovery. Using 12 microsatellite loci, we compared the genetic variation in Scottish and Swedish specimens (Swedish populations are thought to represent a more outbred B. fallax population). As expected, the Scottish population showed significantly lower levels of polymorphism, expected heterozygosity and allelic richness than the Swedish population. Furthermore, significant genetic differentiation was found between the two B. fallax populations (FST = 0.134). We then used an allele frequency-based approach and a Bayesian coalescent-based method to assess genealogical history and detect recent changes in population size. Unexpectedly, data from not only the Scottish but also the Swedish population indicated a strong and relatively recent decline that was more pronounced in Scotland. We discuss the implications of our findings for future conservation management planning, the first undertaking of its kind for saproxylic species in Britain.
Type: Journal Article
URI: http://hdl.handle.net/1893/19504
DOI Link: http://dx.doi.org/10.1007/s10592-012-0371-9
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Affiliation: Biological and Environmental Sciences
Biological and Environmental Sciences
University of Zurich
University of Zurich
University of Zurich
Biological and Environmental Sciences
Biological and Environmental Sciences

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