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Abstract
Veselá J., Urbánková P., Černá K. and Neustupa J. 2012. Ecological variation within traditional diatom morphospecies: diversity of Frustulia rhomboides sensu lato (Bacillariophyceae) in European freshwater habitats. Phycologia 51: 552–561. DOI: 10.2116/11-101.1
More than 300 strains of Frustulia rhomboides sensu lato were isolated from populations across Europe to estimate its molecular diversity and geographic distribution in oligotrophic freshwater habitats. Phylogenetic analyses, based on partial large subunit (LSU) rDNA sequences, revealed six lineages that did not fully correspond with the separation of F. rhomboides into traditional varieties. Although four closely related lineages showed substantial overlaps in morphology, the characteristic morphological features could be determined using morphometric techniques. The phylogenetic lineages of F. rhomboides showed different patterns of distribution among regions. Sequence frequencies within samples from different habitats indicated that distribution of the common lineages most likely reflected their different ecological preferences rather than dispersal constraints.
ACKNOWLEDGEMENTS
We thank colleagues from the phycological research group for their help with the sampling. We are grateful to the reviewers for their valuable comments and suggestions. Funding of this work was provided by Research Project 0021620828 of the Czech Ministry of Education and by the Charles University Science Foundation Project B-Bio 30108.
SUPPLEMENTARY DATA
Supplementary data associated with this article can be found in the online version, at doi: 10.2116/11-101.1.