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Göteborgs universitets publikationer

Trapped in the extinction vortex? Strong genetic effects in a declining vertebrate population

Författare och institution:
Donald Blomqvist (Zoologiska institutionen, ekologisk zoologi); Angela Pauliny (Zoologiska institutionen, ekologisk zoologi); Mikael Larsson (-); Lars-Åke Flodin (-)
Publicerad i:
BMC Evolutionary Biology, 10 ( 33 )
Artikel, refereegranskad vetenskaplig
Fulltextlänk (lokalt arkiv):
Sammanfattning (abstract):
BACKGROUND: Inbreeding and loss of genetic diversity are expected to increase the extinction risk of small populations, but detailed tests in natural populations are scarce. We combine long-term population and fitness data with those from two types of molecular markers to examine the role of genetic effects in a declining metapopulation of southern dunlins Calidris alpina schinzii, an endangered shorebird. RESULTS: The decline is associated with increased pairings between related individuals, including close inbreeding (as revealed by both field observations of parentage and molecular markers). Furthermore, reduced genetic diversity seems to affect individual fitness at several life stages. Higher genetic similarity between mates correlates negatively with the pair's hatching success. Moreover, offspring produced by related parents are more homozygous and suffer from increased mortality during embryonic development and possibly also after hatching. CONCLUSIONS: Our results demonstrate strong genetic effects in a rapidly declining population, emphasizing the importance of genetic factors for the persistence of small populations.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
Biologiska vetenskaper
Ytterligare information:
© 2010 Blomqvist et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Postens nummer:
Posten skapad:
2010-02-23 17:27
Posten ändrad:
2012-12-05 09:48

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