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    Molecules to marinescapes: the characterization of microbial life in the Arctic Ocean

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    Hassett_uaf_0006E_10463.pdf
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    Author
    Hassett, Brandon T.
    Committee
    Gradinger, Rolf
    Collins, R. Eric
    Leigh, Mary Beth
    McBeath, Jenifer
    Lopez, J. Andres
    Metadata
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    URI
    http://hdl.handle.net/11122/6610
    Abstract
    Microbes are the base of all marine food webs and comprise >90% of all living biomass in the world’s oceans. Microbial life and functioning in high-latitude seas is characterized by the predominance of unknown species that encode uncharacterized genes, replenish nutrients, and modulate ecosystem health by interfacing with disease processes. This research elucidates eukaryotic microbial diversity and functionality in Arctic and sub-Arctic marine environments by describing the culturable and genetic diversity of eukaryotic microbes and the life histories of marine fungi belonging to the Chytridiomycota. This work includes the description of two new mesomycetozoean species, the assembled and annotated genome of Sphaeroforma sirkka, the first description of a cryptic carbon cycle (the mycoloop) mediated by fungi from any marine environment, and the description of large-scale eukaryotic microbial diversity patterns driven by temperature and latitude in the eastern Bering Sea. These results help establish a valuable baseline of microbial diversity in high latitude seas.
    Description
    Dissertation (Ph.D.) University of Alaska Fairbanks, 2016
    Date
    2016-05
    Type
    Dissertation
    Collections
    Marine Sciences

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