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Molecular analyses reveal high species diversity of trematodes in a sub-Arctic lake

March 14, 2017

To identify trematode diversity and life-cycles in the sub-Arctic Lake Takvatn, Norway, we characterised 120 trematode isolates from mollusc first intermediate hosts, metacercariae from second intermediate host fishes and invertebrates, and adults from fish and invertebrate definitive hosts, using molecular techniques. Phylogenies based on nuclear and/or mtDNA revealed high species richness (24 species or species-level genetic lineages), and uncovered trematode diversity (16 putative new species) from five families typical in lake ecosystems (Allocreadiidae, Diplostomidae, Plagiorchiidae, Schistosomatidae and Strigeidae). Sampling potential invertebrate hosts allowed matching of sequence data for different stages, thus achieving molecular elucidation of trematode life-cycles and exploration of host-parasite interactions. Phylogenetic analyses also helped identify three major mollusc intermediate hosts (Radix balthica, Pisidium casertanum and Sphaerium sp.) in the lake. Our findings increase the known trematode diversity at the sub-Arctic Lake Takvatn, showing that digenean diversity is high in this otherwise depauperate sub-Arctic freshwater ecosystem, and indicating that sub-Arctic and Arctic ecosystems may be characterised by unique trematode assemblages.

Publication Year 2017
Title Molecular analyses reveal high species diversity of trematodes in a sub-Arctic lake
DOI 10.1016/j.ijpara.2016.12.008
Authors Miroslava Soldánová, Simona Georgieva, Jana Roháčováa, Rune Knudsen, Jesper A. Kuhn, Eirik H. Henriksen, Anna Siwertsson, Jenny C. Shaw, Armand M. Kuris, Per-Arne Amundsen, Tomáš Scholz, Kevin D. Lafferty, Aneta Kostadinova
Publication Type Article
Publication Subtype Journal Article
Series Title International Journal for Parasitology
Index ID 70185664
Record Source USGS Publications Warehouse
USGS Organization Western Ecological Research Center