ArticleBMC evolutionary biology2011
Strong differences in the clonal variation of two Daphnia species from mountain lakes affected by overwintering strategy.
Article in BMC evolutionary biology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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14 citing papers in PubMed.
- Genetic Variation in Reproductive Investment Across an Ephemerality Gradient in Daphnia pulex.Molecular biology and evolution · 2022Article
- DNA methylation differs extensively between strains of the same geographical origin and changes with age in Daphnia magna.Epigenetics & chromatin · 2021Article
- To remain or leave: Dispersal variation and its genetic consequences in benthic freshwater invertebrates.Ecology and evolution · 2019Article
- Contrasting patterns of divergence at the regulatory and sequence level in EuropeanEcology and evolution · 2019Article
- Cytonuclear diversity and shared mitochondrial haplotypes among Daphnia galeata populations separated by seven thousand kilometres.BMC evolutionary biology · 2018Article
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- Diapause and maintenance of facultative sexual reproductive strategies.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2016Article
- Characterization of genome-wide SNPs for the water flea Daphnia pulicaria generated by genotyping-by-sequencing (GBS).Scientific reports · 2016Article
- Does the avoidance of sexual costs increase fitness in asexual invaders?Proceedings of the National Academy of Sciences of the United States of America · 2015Article
- Extreme Environments Facilitate Hybrid Superiority - The Story of a Successful Daphnia galeata × longispina Hybrid Clone.PloS one · 2015Article
- Population structure of a microparasite infecting Daphnia: spatio-temporal dynamics.BMC evolutionary biology · 2014Article
- Hybridizing Daphnia communities from ten neighbouring lakes: spatio-temporal dynamics, local processes, gene flow and invasiveness.BMC evolutionary biology · 2014Article
- Fine-scale temporal and spatial variation of taxon and clonal structure in the Daphnia longispina hybrid complex in heterogeneous environments.BMC evolutionary biology · 2012Article
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3 authors.
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Abstract
backgroundThe population structure of cyclical parthenogens such as water fleas is strongly influenced by the frequency of alternations between sexual and asexual (parthenogenetic) reproduction, which may differ among populations and species. We studied genetic variation within six populations of two closely related species of water fleas of the genus Daphnia (Crustacea, Cladocera). D. galeata and D. longispina both occur in lakes in the Tatra Mountains (Central Europe), but their populations show distinct life history strategies in that region. In three studied lakes inhabited by D. galeata, daphnids overwinter under the ice as adult females. In contrast, in lakes inhabited by D. longispina, populations apparently disappear from the water column and overwinter as dormant eggs in lake sediments. We investigated to what extent these different strategies lead to differences in the clonal composition of late summer populations.
resultsAnalysis of genetic variation at nine microsatellite loci revealed that clonal richness (expressed as the proportion of different multilocus genotypes, MLGs, in the whole analysed sample) consistently differed between the two studied species. In the three D. longispina populations, very high clonal richness was found (MLG/N ranging from 0.97 to 1.00), whereas in D. galeata it was much lower (0.05 to 0.50). The dominant MLGs in all D. galeata populations were heterozygous at five or more loci, suggesting that such individuals all represented the same clonal lineages rather than insufficiently resolved groups of different clones.
conclusionsThe low clonal diversities and significant deviations from Hardy-Weinberg equilibrium in D. galeata populations were likely a consequence of strong clonal erosion over extended periods of time (several years or even decades) and the limited influence of sexual reproduction. Our data reveal that populations of closely related Daphnia species living in relatively similar habitats (permanent, oligotrophic mountain lakes) within the same region may show strikingly different genetic structures, which most likely depend on their reproductive strategy during unfavourable periods. We assume that similar impacts of life history on population structures are also relevant for other cyclical parthenogen groups. In extreme cases, prolonged clonal erosion may result in the dominance of a single clone within a population, which might limit its microevolutionary potential if selection pressures suddenly change.
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