• Login
    View Item 
    •   Home
    • UA Faculty Research
    • UA Faculty Publications
    • View Item
    •   Home
    • UA Faculty Research
    • UA Faculty Publications
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of UA Campus RepositoryCommunitiesTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournalThis CollectionTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournal

    My Account

    LoginRegister

    About

    AboutUA Faculty PublicationsUA DissertationsUA Master's ThesesUA Honors ThesesUA PressUA YearbooksUA CatalogsUA Libraries

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Dynamic changes in dissolved organic matter composition in a Mountain Lake under ice cover and relationships to changes in nutrient cycling and phytoplankton community composition

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    RevisedDraft.pdf
    Size:
    163.8Kb
    Format:
    PDF
    Description:
    Final Accepted Manuscript
    Download
    Author
    Rue, Garrett P.
    Darling, Joshua P.
    Graham, Emily
    Tfaily, Malak M.
    McKnight, Diane M.
    Affiliation
    Univ Arizona, Dept Soil Water & Environm Sci
    Issue Date
    2019-12-17
    Keywords
    Winter
    Limnology
    Biogeochemistry
    DOM
    Mountain Lakes
    
    Metadata
    Show full item record
    Publisher
    SPRINGER BASEL AG
    Citation
    Rue, G.P., Darling, J.P., Graham, E. et al. Dynamic changes in dissolved organic matter composition in a Mountain Lake under ice cover and relationships to changes in nutrient cycling and phytoplankton community composition. Aquat Sci 82, 15 (2020). https://doi.org/10.1007/s00027-019-0687-3
    Journal
    AQUATIC SCIENCES
    Rights
    Copyright © Springer Nature Switzerland AG 2019.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    We studied Bear Lake, a subalpine oligotrophic lake in Rocky Mountain National Park, Colorado USA, during the winter ice cover period of 2018. Our goal was to understand relationships between biogeochemical and biotic processes and the chemical quality of the dissolved organic matter (DOM), a major pool of organic carbon in all lakes. The lake was stratified with limited light availability and had a consistent oxycline at 7 m. Nutrient concentrations were low and the depletion of nitrogen species was related to increased phytoplankton abundance. The phytoplankton community became progressively dominated by a potentially mixotrophic dinoflagellate species, Gymnodinium sp., and a deep chlorophyll maximum developed above the hypolimnion. Changes in the chemical quality of DOM, as measured through high-resolution mass spectrometry, were associated with these shifts in nutrient and phytoplankton composition. The spectrometry data revealed a pool of organic compounds many of which contained phosphorus, nitrogen, and sulfur. This pool evolved through the winter, with phosphorus-containing compounds becoming more predominant in the upper oxic zone and sulfur-containing compounds becoming more predominant in the anoxic bottom waters. Reduced chemo diversity of the DOM pool in the surface waters developed through the winter. In the bottom waters, more unique compounds were produced through the winter, and the favorability of the DOM to support microbial respiration also increased. These observed differences in DOM molecular composition were not reflected in the spectroscopic signature of the DOM pool. Overall, our results show chemical changes in the DOM pool correlate to dynamic redox conditions, biogeochemical cycling, and biotic response to ice cover.
    Note
    12 month embargo; published online: 17 December 2019
    ISSN
    1015-1621
    DOI
    10.1007/s00027-019-0687-3
    Version
    Final accepted manuscript
    ae974a485f413a2113503eed53cd6c53
    10.1007/s00027-019-0687-3
    Scopus Count
    Collections
    UA Faculty Publications

    entitlement

     
    The University of Arizona Libraries | 1510 E. University Blvd. | Tucson, AZ 85721-0055
    Tel 520-621-6442 | repository@u.library.arizona.edu
    DSpace software copyright © 2002-2017  DuraSpace
    Quick Guide | Contact Us | Send Feedback
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.