ArticleMicrobial ecology2007
Phenotypically different microalgal morphospecies with identical ribosomal DNA: a case of rapid adaptive evolution?
Article in Microbial ecology, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.
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Who cites it
26 citing papers in PubMed.
- Contrasting niche dynamics in the invasion processes of two congeneric dinoflagellates.Scientific reports · 2025Article
- Population genomic analyses reveal that salinity and geographic isolation drive diversification in a free-living protist.Scientific reports · 2024Article
- Disentangling microbial networks across pelagic zones in the tropical and subtropical global ocean.Nature communications · 2024Article
- Quantitative real-time PCR assays for species-specific detection and quantification of Baltic Sea spring bloom dinoflagellates.Frontiers in microbiology · 2024Article
- Convergent evolution and horizontal gene transfer in Arctic Ocean microalgae.Life science alliance · 2023Article
- Global patterns and rates of habitat transitions across the eukaryotic tree of life.Nature ecology & evolution · 2022Article
- Taxonomic study of a novel terrestrial alga,PhytoKeys · 2022Article
- Accessing the genomic information of unculturable oceanic picoeukaryotes by combining multiple single cells.Scientific reports · 2017Article
- Comparative Analysis of Membrane Lipids in Psychrophilic and Mesophilic Freshwater Dinoflagellates.Frontiers in plant science · 2016Article
- Recent radiation in a marine and freshwater dinoflagellate species flock.The ISME journal · 2015Article
- Phylogeography of the freshwater raphidophyte Gonyostomum semen confirms a recent expansion in northern Europe by a single haplotype.Journal of phycology · 2015Article
- Combined Culture-Based and Culture-Independent Approaches Provide Insights into Diversity of Jakobids, an Extremely Plesiomorphic Eukaryotic Lineage.Frontiers in microbiology · 2015Article
- SSU rDNA divergence in planktonic foraminifera: molecular taxonomy and biogeographic implications.PloS one · 2014Article
- Dispersal in a changing world: opportunities, insights and challenges.Movement ecology · 2013Article
- Characterization of eukaryotic microbial diversity in hypersaline Lake Tyrrell, Australia.Frontiers in microbiology · 2013Article
- Seasonal diversity of planktonic protists in Southwestern Alberta rivers over a 1-year period as revealed by terminal restriction fragment length polymorphism and 18S rRNA gene library analyses.Applied and environmental microbiology · 2012Article
- Polar lakes may act as ecological islands to aquatic protists.Molecular ecology · 2012Article
- Molecular diversity of the syndinean genus Euduboscquella based on single-cell PCR analysis.Applied and environmental microbiology · 2012Article
- Patterns of post-glacial genetic differentiation in marginal populations of a marine microalga.PloS one · 2012Article
- Telonemia-specific environmental 18S rDNA PCR reveals unknown diversity and multiple marine-freshwater colonizations.BMC microbiology · 2010Article
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Authors and funding
8 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The agents driving the divergence and speciation of free-living microbial populations are still largely unknown. We investigated the dinoflagellate morphospecies Scrippsiella hangoei and Peridinium aciculiferum, which abound in the Baltic Sea and in northern temperate lakes, respectively. Electron microscopy analyses showed significant interspecific differences in the external cellular morphology, but a similar plate pattern in the characteristic dinoflagellate armor. Experimentally, S. hangoei grew in a wide range of salinities (0-30), whereas P. aciculiferum only grew in low salinities (0-3). Despite these phenotypic differences and the habitat segregation, molecular analyses showed identical ribosomal DNA sequences (ITS1, ITS2, 5.8S, SSU, and partial LSU) for both morphospecies. Yet, a strong interspecific genetic isolation was indicated by amplified fragment length polymorphism (F (ST) = 0.76) and cytochrome b (cob) sequence divergence ( approximately 1.90%). Phylogenetic reconstructions based on ribosomal (SSU, LSU) and mitochondrial (cob) DNA indicated a recent marine ancestor for P. aciculiferum. In conclusion, we suggest that the lacustrine P. aciculiferum and the marine-brackish S. hangoei diverged very recently, after a marine-freshwater transition that exposed the ancestral populations to different selective pressures. This hypothetical scenario agrees with mounting data indicating a significant role of natural selection in the divergence of free-living microbes, despite their virtually unrestricted dispersal capabilities. Finally, our results indicate that identical ITS rDNA sequences do not necessarily imply the same microbial species, as commonly assumed.
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