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High habitat-specificity in fungal communities in oligo-mesotrophic, temperate Lake Stechlin (North-East Germany)
Leibniz Inst Freshwater Ecol & Inland Fisheries, Dept Ecosyst Res, Berlin, Germany.;Berlin Ctr Genom Biodivers Res, Berlin, Germany.;Leibniz Inst Freshwater Ecol & Inland Fisheries, Dept Expt Limnol, Stechlin, Germany.;Univ Gothenburg, Dept Biol & Environm Sci, Gothenburg, Sweden..
Leibniz Inst Freshwater Ecol & Inland Fisheries, Dept Ecosyst Res, Berlin, Germany.;Berlin Ctr Genom Biodivers Res, Berlin, Germany.;Australian Natl Univ, Res Sch Biol, Div Plant Sci, Canberra, ACT, Australia..
Leibniz Inst Freshwater Ecol & Inland Fisheries, Dept Ecosyst Res, Berlin, Germany.;Berlin Ctr Genom Biodivers Res, Berlin, Germany..
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Limnology. Leibniz Inst Freshwater Ecol & Inland Fisheries, Dept Expt Limnol, Stechlin, Germany.
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2016 (English)In: MycoKeys, ISSN 1314-4057, E-ISSN 1314-4049, no 16, 17-44 p.Article in journal (Refereed) Published
Abstract [en]

Freshwater fungi are a poorly studied ecological group that includes a high taxonomic diversity. Most studies on aquatic fungal diversity have focused on single habitats, thus the linkage between habitat heterogeneity and fungal diversity remains largely unexplored. We took 216 samples from 54 locations representing eight different habitats in the meso-oligotrophic, temperate Lake Stechlin in North-East Germany. These included the pelagic and littoral water column, sediments, and biotic substrates. We performed high throughput sequencing using the Roche 454 platform, employing a universal eukaryotic marker region within the large ribosomal subunit (LSU) to compare fungal diversity, community structure, and species turnover among habitats. Our analysis recovered 1027 fungal OTUs (97% sequence similarity). Richness estimates were highest in the sediment, biofilms, and benthic samples (189-231 OTUs), intermediate in water samples (42-85 OTUs), and lowest in plankton samples (8 OTUs). NMDS grouped the eight studied habitats into six clusters, indicating that community composition was strongly influenced by turnover among habitats. Fungal communities exhibited changes at the phylum and order levels along three different substrate categories from littoral to pelagic habitats. The large majority of OTUs (> 75%) could not be classified below the order level due to the lack of aquatic fungal entries in public sequence databases. Our study provides a first estimate of lake-wide fungal diversity and highlights the important contribution of habitat heterogeneity to overall diversity and community composition. Habitat diversity should be considered in any sampling strategy aiming to assess the fungal diversity of a water body.

Place, publisher, year, edition, pages
2016. no 16, 17-44 p.
Keyword [en]
Freshwater fungi, aquatic fungi, metabarcoding, LSU, GMYC, habitat specificity, Chytridiomycota, Cryptomycota, Rozellomycota, community ecology, lake ecosystem, biofilm, sediment, plankton, water sample, benthos, reed, fungal diversity
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Biological Sciences
Identifiers
URN: urn:nbn:se:uu:diva-308964DOI: 10.3897/mycokeys.16.9646ISI: 000387016900002OAI: oai:DiVA.org:uu-308964DiVA: diva2:1051157
Available from: 2016-12-01 Created: 2016-12-01 Last updated: 2016-12-01Bibliographically approved

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Attermeyer, Katrin
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