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- Thulin, Carl-Gustaf, et al.
(författare)
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The impact of founder events and introductions on genetic variation in the muskox Ovibos moschatus in Sweden
- 2011
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Ingår i: Acta Theriologica. - : Springer Science and Business Media LLC. - 0001-7051 .- 2190-3743. ; 56:4, s. 305-314
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Tidskriftsartikel (refereegranskat)abstract
- The muskox Ovibos moschatus (Zimmerman 1780) is a specialised arctic mammal with a highly fragmented circumpolar distribution, with native populations in Canada and east Greenland and introduced populations in west Greenland, Alaska, Siberia and Eurasia. In 1971, five O. moschatus individuals from an introduced population in Norway migrated to Sweden. After a peak population of 36 individuals in the mid-1980s, the Swedish population now numbers seven individuals, making it vulnerable to both demographic and genetic stochasticity (i.e. inbreeding). Here, we analyse genetic variation among native and introduced populations of O. moschatus to evaluate the genetic effect of sequential founder events in this species. Our results show that genetic variation among native and introduced O. moschatus populations do not conform entirely to the expectations from sequential founder events, most likely because of random processes associated with introduction. In the Swedish population, a calf resulting from the mating of a wild cow and a captive Greenlandic bull contributes significantly to the current genetic variation. Thus, even a single outbreeding event may, at least momentarily, increase the genetic variation and potentially prevent inbreeding depression. Our results should aid the long-term preservation of O. moschatus in Sweden and Europe.
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- Dussex, Nicolas, et al.
(författare)
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Range-wide and temporal genomic analyses reveal the consequences of near-extinction in Swedish moose
- 2023
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Ingår i: Communications Biology. - 2399-3642. ; 6:1
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Tidskriftsartikel (refereegranskat)abstract
- Ungulate species have experienced severe declines over the past centuries through overharvesting and habitat loss. Even if many game species have recovered thanks to strict hunting regulation, the genome-wide impacts of overharvesting are still unclear. Here, we examine the temporal and geographical differences in genome-wide diversity in moose (Alces alces) over its whole range in Sweden by sequencing 87 modern and historical genomes. We found limited impact of the 1900s near-extinction event but local variation in inbreeding and load in modern populations, as well as suggestion of a risk of future reduction in genetic diversity and gene flow. Furthermore, we found candidate genes for local adaptation, and rapid temporal allele frequency shifts involving coding genes since the 1980s, possibly due to selective harvesting. Our results highlight that genomic changes potentially impacting fitness can occur over short time scales and underline the need to track both deleterious and selectively advantageous genomic variation.
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- Edenius, Lars, et al.
(författare)
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The effects of changing land use and browsing on aspen abundance and regeneration: a 50-year perspective from Sweden
- 2011
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Ingår i: Journal of Applied Ecology. - : Wiley. - 0021-8901 .- 1365-2664. ; 48, s. 301-309
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Tidskriftsartikel (refereegranskat)abstract
- 5. Synthesis and applications. Our results suggest that changes in land use practices are the main cause of changes in aspen abundance at regional and national scales in Sweden during the last 50 years. Restoring regeneration niches, most importantly emulating natural disturbance processes, viz. fire at various spatial scales, and retaining aspen in cleaning and pre-commercial thinnings are the most important management recommendations to secure regeneration of aspen. Protecting established aspen ramets at designated sites from browsing either by fencing or reducing ungulate numbers could be used as complementary management tools.
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- Håkansson, Cecilia, et al.
(författare)
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Exploring distributional determinants of large carnivore conservation in Sweden
- 2011
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Ingår i: Journal of Environmental Planning and Management. - : Informa UK Limited. - 0964-0568 .- 1360-0559. ; 54:5, s. 577-595
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Tidskriftsartikel (refereegranskat)abstract
- This paper aims to fill the gap in the literature about distributional impacts (who wins and who loses) of implementing new management plans for non-market priced environmental goods and services. The focus is on whether and to what extent, age, gender, presence of large carnivores and income affect willingness-to-pay (WTP) for increasing large carnivore stocks in Sweden. Our results contradict findings from previous studies on large carnivores in the sense that patterns change when different distributional dimensions are analysed together. The results indicate that WTP is independent of the presence of large carnivores, except for the group 'young men'. In general, young men are found to be a disparate group.
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- Lundberg, Per, et al.
(författare)
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Åtgärder — beskattning
- 2010
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Ingår i: Vilt, människa, samhälle. - Stockholm : Liber. - 9789147094189 ; , s. 249-269
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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