Genetic response to eutrophication in three-spined sticklebacks (Gasterosteus aculeatus): A study of multiple Baltic Sea populations
(English)Manuscript (preprint) (Other academic)
Anthropogenic activities are causing change in natural habitats at an accelerating rate and affecting populations by altered selection pressures. One example is human-induced eutrophication in the Baltic Sea, were behaviour alterations are well documented in three-spined sticklebacks (Gasterosteus aculeatus). Here we have used 204 variable Amplified Fragment Length Polymorphism (AFLP) markers to investigate genetic differences between a set of ten hierarchal sampled populations of sticklebacks, five populations inhabiting eutrophicated habitats and five from control populations, in total 292 individuals. We found significant genetic variation that could be attributed to habitat (4.3% AMOVA). A combination of FST outlier analysis and classification analysis revealed seven AFLP-loci likely to be affected by divergent selection by eutrophication. Four of these seven loci have earlier been identified as under selection in stickleback populations living in pulp-mill effluents suggesting some similar selective factors between eutrophication and pulp-mill effluent effected habitats.
Genetics Evolutionary Biology Environmental Sciences
Research subject Functional Zoomorphology
IdentifiersURN: urn:nbn:se:su:diva-89481OAI: oai:DiVA.org:su-89481DiVA: diva2:618266