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Sökning: WFRF:(Ericsson Göran) > Sveriges Lantbruksuniversitet

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  • Blåhed, Ida-Maria, et al. (författare)
  • Discovery of SNPs for individual identification by reduced representation sequencing of moose (Alces alces)
  • 2018
  • Ingår i: PLoS ONE. - : Public Library of Science (PLoS). - 1932-6203. ; 13
  • Tidskriftsartikel (refereegranskat)abstract
    • Monitoring of wild animal populations is challenging, yet reliable information about population processes is important for both management and conservation efforts. Access to molecular markers, such as SNPs, enables population monitoring through genotyping of various DNA sources. We have developed 96 high quality SNP markers for individual identification of moose (Alces alces), an economically and ecologically important top-herbivore in boreal regions. Reduced representation libraries constructed from 34 moose were high-throughput de novo sequenced, generating nearly 50 million read pairs. About 50 000 stacks of aligned reads containing one or more SNPs were discovered with the Stacks pipeline. Several quality criteria were applied on the candidate SNPs to find markers informative on the individual level and well representative for the population. An empirical validation by genotyping of sequenced individuals and additional moose, resulted in the selection of a final panel of 86 high quality autosomal SNPs. Additionally, five sex-specific SNPs and five SNPs for sympatric species diagnostics are included in the panel. The genotyping error rate was 0.002 for the total panel and probability of identities were low enough to separate individuals with high confidence. Moreover, the autosomal SNPs were highly informative also for population level analyses. The potential applications of this SNP panel are thus many including investigations of population size, sex ratios, relatedness, reproductive success and population structure. Ideally, SNP-based studies could improve today's population monitoring and increase our knowledge about moose population dynamics.
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  • Dussex, Nicolas, et al. (författare)
  • Range-wide and temporal genomic analyses reveal the consequences of near-extinction in Swedish moose
  • 2023
  • Ingår i: Communications Biology. - 2399-3642. ; 6:1
  • 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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10.
  • Edenius, Lars, et al. (författare)
  • The effects of changing land use and browsing on aspen abundance and regeneration: a 50-year perspective from Sweden
  • 2011
  • Ingår i: Journal of Applied Ecology. - : Wiley. - 0021-8901 .- 1365-2664. ; 48, s. 301-309
  • 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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