Jyväskylä, Finland
Jyväskylä, Finland

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Lam D.W.,Ohio University | Entwisle T.J.,Surrey TW9 3AB | Eloranta P.,Sinkilatie 13 | Kwandrans J.,Polish Academy of Sciences | Vis M.L.,Ohio University
European Journal of Phycology | Year: 2012

Species level taxonomy and phylogeographical distribution patterns in the freshwater rhodophyte Sirodotia are resolved through phylogenetic inferences based on rbcL and cox2-3 sequence data. Previous studies focused on the taxonomy of specific Sirodotia species or the distributions across a limited geographical region. Our molecular phylogenies included samples attributable to five recognized Sirodotia species and include collections from Australia, Brazil, Costa Rica, Canada, Finland, Mexico, New Zealand, South Africa and the United States. Both rbcL and cox2-3 phylogenies inferred S. suecica, S. tenuissima and S. goebelii as a monophyletic group with little sequence divergence. This result supports the synonymy of S. tenuissima and S. goebelii with S. suecica (the species name with priority). Within this clade, samples collected from Australia and New Zealand formed a monophyletic group with no other discernible phylogeographical patterns within S. suecica. This result seems to be somewhat unusual in the Batrachospermales, as other species have shown greater genetic variation among geographically distant locations. As in previous studies, S. huillensis and S. delicatula were inferred as a separate species based on the rbcL phylogeny, supporting the current taxonomy. A specimen of S. aff. huillensis from South Africa, may represent a new species but further research is necessary before it can be designated as such. © 2012 Copyright Taylor and Francis Group, LLC.


Keil E.J.,Ohio University | Macy T.R.,Ohio University | Kwandrans J.,Polish Academy of Sciences | Eloranta P.,Sinkilatie 13 | And 3 more authors.
Phycologia | Year: 2015

The freshwater red alga Batrachospermum gelatinosum inhabits streams of Europe and North America and has been collected frequently on both continents. A study of this species in North America showed evidence of a glacial refugium in the southeastern United States with little genetic variation throughout its more northern range in eastern North America. The present study was initiated to investigate its phylogeography throughout Europe and to compare these results with those obtained for North America. Specimens were collected from Belgium, Estonia, Finland, France, Great Britain, Italy, Latvia, Lithuania, Poland and Spain. Both the mitochondrial cytochrome c oxidase subunit I (COI) barcode region and the nuclear rDNA internal transcribed spacer (ITS 1 and 2) regions were analysed. Of the 70 individuals analysed, 12 COI haplotypes were uncovered. In addition, ITS variation of 67 individuals was surveyed and showed 21 haplotypes. The haplotype network of COI data showed a large number of the individuals distributed among three common haplotypes. The other nine haplotypes differed from the common ones by only one to two base pairs and were represented by only one to six individuals. The ITS network had a star appearance with a common haplotype (17 individuals) and many closely related haplotypes with few individuals per haplotype. Compared to North America, there were more COI haplotypes present in Europe (12 vs 5), and the relationship among haplotypes was more complex. The geographic distribution of haplotypes did not appear to follow a glaciation pattern; rather, the common haplotypes were widespread, suggesting a recent expansion. © 2015 International Phycological Society.


PubMed | Sinkilatie 13, Polish Academy of Sciences and Ohio University
Type: Journal Article | Journal: Journal of phycology | Year: 2016

The freshwater red algal genus Batrachospermum has been shown to be paraphyletic since the first molecular studies of the Batrachospermales. Previous research, along with this study, provides strong support for the clade Batrachospermum section Helminthoidea. This study has found that heterocortication, the presence of both cylindrical and bulbous cells on the main axis, is an underlying synapomorphy of this clade. Based on support from DNA sequences of the rbcL gene, the COI barcode region and the rDNA ITS 1 and 2, along with morphological studies, the new genus Sheathia is proposed. Seven heterocorticate species were recognized from the molecular clades. Sheathia boryana and S.exigua sp. nov. appear to be restricted to Europe, whereas S.confusa occurs in Europe and New Zealand. Sheathia involuta is widespread in the USA and reported for the first time from Europe. Sheathia americana sp. nov., has been collected in the USA and Canada, and S.heterocortica and S.grandis sp. nov. have been collected only in the USA. Sheathia confusa and S.grandis can be distinguished based on morphological characters, whereas DNA sequence data are required to conclusively distinguish the other species. Sheathia fluitans and S.carpoinvolucra also are placed within this genus based on the presence of heterocortication. These data also hint at greater diversity among non-heterocorticate Sheathia than is recognized by the single species name S.arcuata.


Eloranta P.,Sinkilatie 13 | Eloranta A.,Center for Economic Development | Peramaki P.,Center for Economic Development
Fottea | Year: 2016

Freshwater red algae (Rhodophyta) were studied in Central Finland by examining 2224 rivers and brooks during the open water periods of the years 2012–2015 with supplementary sampling in S– and SW–Finland, the W–coast rivers and Lapland. A total of 1957 records of algae were made. Approximately 56.2% of the studied locations had 1–6 taxa. The total taxa collected were 25, with 5 taxa new to Finland. While sampling, ecological variables were recorded and measured. The most common taxa were Batrachospermum gelatinosum (37.0%), Sheathia arcuata (10.7%), Audouinella hermannii (11.2%) and Sirodotia suecica (7.0%). Lemanea spp. (9.9%) occurred in larger rivers. Most records were from July and August, but some also in winter months. From the most rare taxa, Lemanea condensata was found in Lapland rivers, Batrachospermum vogesiacum in acid, dystrophic rivers in Central Finland, B. atrum in 7 eutrophic rivers, Kumanoa globospora in 6 rivers of Central Finland, Batrachospermum elegans in 6 and K. virgatodecaisneana in 5 harder–water rivers of SW–Finland. © Czech Phycological Society (2016).

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