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Microbial eukaryotes in an arctic under-ice spring bloom north of Svalbard

Permanent lenke
https://hdl.handle.net/10037/12271
DOI
https://doi.org/10.3389/fmicb.2017.01099
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article.pdf (1.793Mb)
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Dato
2017-06-28
Type
Journal article
Tidsskriftartikkel
Peer reviewed

Forfatter
Meshram Rao, Archana; Vader, Anna; Kristiansen, Svein; Gabrielsen, Tove M.
Sammendrag
Microbial eukaryotes can play prominent roles in the Arctic marine ecosystem, but their diversity and variability is not well known in the ice-covered ecosystems. We determined the community composition of microbial eukaryotes in an Arctic under-ice spring bloom north of Svalbard using metabarcoding of DNA and RNA from the hypervariable V4 region of 18S nrDNA. At the two stations studied, the photosynthetic biomass was dominated by protists >3 μm and was concentrated in the upper 70–80 m, above the thermocline and halocline. Hierarchical cluster analyses as well as ordination analyses showed a distinct clustering of the microbial eukaryote communities according to a combination of water mass and local environmental characteristics. While samples collected in the surface mixed layer differed distinctly between the two sites, the deeper communities collected in Atlantic Water were fairly similar despite being geographically distant. The differentiation of the microbial eukaryote communities of the upper mixed water was probably driven by local development and advection, while the lack of such differentiation in the communities of Atlantic Water reflects the homogenizing effect of water currents on microbial communities.
Beskrivelse
Source at https://doi.org/10.3389/fmicb.2017.01099
Forlag
Frontiers Media
Sitering
Meshram Rao, A., Vader, A., Kristiansen, S., Gabrielsen, T. M. (2017) Microbial eukaryotes in an arctic under-ice spring bloom north of Svalbard. Frontiers in Microbiology. 8(1099), 1-12. https://doi.org/10.3389/fmicb.2017.01099
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