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Synthesis by the Aquatic Cyling of Mercury in the Everglades

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Frequently-anticipated questions:

What does this data set describe?

Title: Synthesis by the Aquatic Cyling of Mercury in the Everglades
The Aquatic Cycling of Mercury in the Everglades (ACME) project was originally designed to examine the reasons behind the observed high levels of mercury in predatory fish across most at the Everglades, and to do so by focusing on fundamental biogeochemical processes. The overall goal of the ACME project was to provide information that would be useful to state and federal management agencies responsible for making Everglades restoration plans, and to hopefully include strategies for reducing mercury toxicity to this fragile ecosystem. Originally, the scientific breadth of the ACME project was limited to critical areas of study central to the mercury contamination issue. After initiation of field studies in 1995, however, substantial information gaps in many basic areas of ecosystem research were revealed for the Everglades (e.g., hydrology, microbiology, and food web studies). As a result, the scope of the effort was expanded to what now is a more complete, general study of biogeochemistry of the Everglades ecosystem. In addition, the geographic coverage was expanded from original plans that called for focusing on just the northern Water Conservation areas, to now, where we sample a complete north-to-south transect of the remaining Everglades (Loxahatchee National Wildlife Refuge to Taylor Slough).
  1. How should this data set be cited?

    Krabbenhoft, David, 2007, Synthesis by the Aquatic Cyling of Mercury in the Everglades.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -81.25
    East_Bounding_Coordinate: -80
    North_Bounding_Coordinate: 26.75
    South_Bounding_Coordinate: 25

  3. What does it look like?

    <http://pubs.usgs.gov/sir/2007/5240/#fig1> (JPEG)
    location of study area in southeastern Florida for assessemnt of potential effects of Aquifer Storage and Recovery (ASR) on mercury cycling
    <https://sofia.usgs.gov/sfrsf/rooms/acme_sics/acme/acsatmapx.jpg> (JPEG)
    ACME project sampling locations in southeastern Florida

  4. Does the data set describe conditions during a particular time period?

    Beginning_Date: 1995
    Ending_Date: 2000
    Currentness_Reference: ground condition

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: report

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

    2. What coordinate system is used to represent geographic features?

  7. How does the data set describe geographic features?

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

    • David Krabbenhoft

  2. Who also contributed to the data set?

  3. To whom should users address questions about the data?

    David P. Krabbenhoft
    U.S. Geological Survey
    8505 Research Way
    Middleton, WI 53562-3581

    608 821-3843 (voice)
    608 821-3817 (FAX)

Why was the data set created?

The toxicological manifestation of mercury contamination varies widely among ecosystems; some ecosystems show little transference of mercury to the food web (bioaccumulation), while others show efficient transfer into living organisms. Such is the case with the Florida Everglades. For the past three years, the Aquatic Cycling of Mercury in the Everglades (ACME) project has been investigating the factors controlling mercury cycling and bioaccumulation. The objective this proposed work is to bring to fruition the research conducted by the ACME project. Products from the synthesis (databases, scientific papers, overall synthesis document) will be valuable for State of Florida managers who are currently making restoration design decisions. In addition, because mercury is globally distributed, the results will be transferable worldwide to other scientists and ecosystem managers.

How was the data set created?

  1. From what previous works were the data drawn?

  2. How were the data generated, processed, and modified?

    Date: 2000 (process 1 of 2)
    Web Enabled Data Base:

    Most of the data collected on mercury in water during the past 3.5 years is already uploaded onto a data server located in the Wisconsin District Office. An Oracle interface is already operational for providing data over the Internet (<http://oraddwimdn.er.usgs.gov/ows-bin/owa/mercury.info>), and will be "fine tuned" and improved with graphics during the summer of 1998. By the end of FY98, all of the aqueous mercury data will be included into this data base and available to the public. Some of the original data would be inappropriate or difficult to upload, such as experimental results to determine process rate coefficients. In those cases, figures or charts that present experimental results that could be useful to others will be included on the Web site. The Web server will have a SEQL-based, user-friendly, graphical interface that will contain "hot keys" that will provide general project information, site maps, listings of project products, site photographs, as well as links to the main INATURES Program web site and the South Florida INATURES site.

    Note: The INATURES porgram is now the Greater Everglades Priority Ecosystems Science (GEPES) Program

    Any use of trade, product, or firm names is for descriptive purposes only and does not constitute endorsement by the U.S. Government

    Date: Unknown (process 2 of 2)
    Preparation of Overall Synthesis Document:

    There are many target audiences for our data and interpretations. Ecosystem managers are more likely to be interested in knowing how all our individual results tie together into a coherent and consistent conceptual framework and what implications they have for restoration plans. Essentially this will entail the coalescing of all of the individual papers produced by individuals involved in the mercury projects, as well as any other information previously published or not included in those papers but useful for the document. In addition, other related work such as mercury toxicity testing on avian populations from the everglades that is now underway at the Patuxent Wildlife Center will be included in this document. The anticipated outlet will be a USGS Circular (or similar publication series).

    Person who carried out this activity:

    David P. Krabbenhoft
    U.S. Geological Survey
    8505 Research Way
    Middleton, WI 53562-3581

    608 821-3843 (voice)
    608 821-3817 (FAX)

  3. What similar or related data should the user be aware of?

    Krabbenhoft, D. P. Aiken, G. R.; Anderson, M. , 2007, An Assessment of the Potential Effects of Aquifer Storage and Recovery on Mercury Cycling in South Florida: USGS Scientific Investigations Report (SIR) 2007-5420, U.S. Geological Survey, Reston, VA.

    Online Links:

    Other_Citation_Details: accessed as of 11/3/2010

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

  2. How accurate are the geographic locations?

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?


  5. How consistent are the relationships among the observations, including topology?


How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: none
Use_Constraints: none

Who wrote the metadata?

Last modified: 03-Nov-2010
Metadata author:
Heather Henkel
U.S. Geological Survey
600 Fourth Street South
St. Petersburg, FL 33701

727 803-8747 ext 3028 (voice)
727 803-2030 (FAX)

Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

This page is <https://sofia.usgs.gov/metadata/sflwww/synth_hgcycl.faq.html>

U.S. Department of the Interior, U.S. Geological Survey
Comments and suggestions? Contact: Heather Henkel - Webmaster
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