• Login
    About WHOAS
    View Item 
    •   WHOAS Home
    • Marine Biological Laboratory
    • Boston University Marine Program (BUMP)
    • View Item
    •   WHOAS Home
    • Marine Biological Laboratory
    • Boston University Marine Program (BUMP)
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of WHOASCommunities & CollectionsBy Issue DateAuthorsTitlesKeywordsThis CollectionBy Issue DateAuthorsTitlesKeywords

    My Account

    LoginRegister

    Statistics

    View Usage Statistics

    Twentieth century water quality trends in Minnesota lakes compared with presettlement variability

    Thumbnail
    View/Open
    Ramstack 20th centory.pdf (1.064Mb)
    Date
    2004-05-18
    Author
    Ramstack, Joy M.  Concept link
    Fritz, Sherilyn C.  Concept link
    Engstrom, Daniel R.  Concept link
    Metadata
    Show full item record
    Citable URI
    https://hdl.handle.net/1912/235
    As published
    https://doi.org/10.1139/F04-015
    DOI
    10.1139/F04-015
    Keyword
    Presettlement water quality
    Abstract
    A diatom-based transfer function was used to reconstruct water chemistry before European settlement in 55 Minnesota lakes. The lakes span three natural ecoregions, which differ in their history of land use, as well as in surficial geology, climate, and vegetation. Postsettlement trends were compared with water chemistry change reconstructed from two presettlement core sections (circa 1750 and 1800) as a measure of natural variability. Presettlement water quality changes were generally small and nondirectional in all three ecoregions. In contrast, half of the urban lakes showed a statistically significant increase in chloride, whereas 30% of urban and 30% of agricultural region lakes record a statistically significant increase in total phosphorus between 1800 and the present. These changes, which are attributed to road salt and nutrient runoff, are strongly correlated with the percentage of watershed area that is developed (residential or urban) in the case of chloride increases and the percentage of developed (metropolitan areas) or agricultural (agricultural areas) land in the case of nutrient increases. Water quality has changed little since 1800 for lakes in the forested regions of northeastern Minnesota. The few changes that are seen in this region are likely related to natural variations in climate or catchment soils.
    Description
    Author Posting. © National Research Council Canada, 2004. This article is posted here by permission of National Research Council Canada for personal use, not for redistribution. The definitive version was published in Canadian Journal of Fisheries and Aquatic Sciences 61 (2004): 561-576, doi:10.1139/F04-015.
    Collections
    • Boston University Marine Program (BUMP)
    Suggested Citation
    Canadian Journal of Fisheries and Aquatic Sciences 61 (2004): 561-576
     

    Related items

    Showing items related by title, author, creator and subject.

    • Thumbnail

      Sonde water quality measurements - Effects of Hurricane Harvey on Estuarine Water Quality in the Guadalupe Estuary between August 2017 and December 2017. 

      Wetz, Michael (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2020-03-03)
      Bottom and surface water quality sonde data of the Guadalupe Estuary site (Texas) between August 2017 and December 2017. For a complete list of measurements, refer to the full dataset description in the supplemental ...
    • Thumbnail

      Wave energy level and geographic setting correlate with Florida beach water quality 

      Feng, Zhixuan; Reniers, Ad; Haus, Brian K.; Solo-Gabriele, Helena M.; Kelly, Elizabeth A. (2015-09)
      Many recreational beaches suffer from elevated levels of microorganisms, resulting in beach advisories and closures due to lack of compliance with Environmental Protection Agency guidelines. We conducted the first statewide ...
    • Thumbnail

      Discrete hydrographic measurements - Effects of Hurricane Harvey on Estuarine Water Quality in the Lavaca-Colorado, Guadalupe and Nueces Estuaries between August 2017 and January 2018. 

      Wetz, Michael (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2020-03-03)
      Discrete hydrographic measurements of Lavaca-Colorado, Guadalupe and Nueces Estuaries on the Texas coast between August 2017 and January 2018. For a complete list of measurements, refer to the full dataset description ...
    All Items in WHOAS are protected by original copyright, with all rights reserved, unless otherwise indicated. WHOAS also supports the use of the Creative Commons licenses for original content.
    A service of the MBLWHOI Library | About WHOAS
    Contact Us | Send Feedback | Privacy Policy
    Core Trust Logo