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Everglades Isotope Data

Entry ID: USGS_SOFIA_ever_isotope_data

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Summary

Abstract: Data are available for the following sites: Cell 4, ENR-OUT, L7, Cell 3, LOX, North Holeyland, E0, F1, U3/Glory Hole, L35B, 2BS, L67, 3A-15, 3A-TH, Lostmans Creek, North Prong Creek, TS-7, and TS-9 for the plants and animals found at each site.

A first step of the Everglades restoration efforts is "getting the water right". However, the underlying goal is actually to re-establish, as ... much as possible, the "pre-development" spatial and temporal distribution of ecosystems throughout the Everglades. Stable isotope compositions of dissolved nutrients, biota, and sediments provide critical information about current and historic ecosystem conditions in the Everglades, including temporal and spatial variations in contaminant sources, biogeochemical reactions in the water column and shallow subsurface, and trophic relations. Hence, the scientific focus of this project is to use stable isotope techniques to examine ecosystem responses (especially variations in foodweb base and trophic structure) to temporal and spatial variations in hydroperiod and contaminant loading for the entire freshwater Everglades. The major "long-term" objectives of this project have been to: (1) determine the stable C, N, and S isotopic compositions of Everglades biota, (2) use bulk and compound-specific isotopic ratios to determine relative trophic positions for major organisms, (3) examine the spatial and temporal changes in foodweb structures across the ecosystem, especially with respect to the effect of anthropogenically derived nutrients and contaminants from agricultural land uses on foodwebs, (4) evaluate the effectiveness of isotopic techniques vs. gut content analysis for determining trophic relations in the Everglades, (5) evaluate the role of algae vs. detritus/microbial materials in foodwebs for the entire freshwater marsh part of the Everglades, and (6) work with modelers to correctly incorporate food web and MeHg bioaccumulation information into predictive models. We have generally completed the sample analysis parts of objectives #1-5, and are writing interpretative reports on topics #1-5. More recent and specific objectives include: (1) link our data on seasonal and temporal differences in foodweb bases and trophic levels with SFWMD, FGFFC, and USGS Hg datasets (first for large fish and, more recently, for lower trophic levels), (2) investigate the effects of seasonal/spatial changes in nutrients, water levels, and reactions on the isotopic compositions at the base of the foodweb (that affect our interpretation of relative trophic positions of organisms), and (3) continue our efforts to link our foodweb isotope data from samples collected at USGS-ACME and EPA-REMAP sites with the spatial environmental patterns observed by the REMAP program.

This work started as part of the Aquatic Cycling of Mercury in the E verglades (ACME) project in 1996 and was made a separate project in 2000.

Related URL

Link: GET DATA

Description: Data may be downloaded from the SOFIA website

Multimedia Sample

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Description: locations of USGS sites, USEPA REMAP sites 1996, and USEPA REMAP sites 1999

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Description: satellite image of south Florida showing biota collection sites

Geographic Coverage

(Click for Interactive Map)

Spatial coordinates

N: 26.67

S: 25.25

E: -80.31

W: -81.02

Data Set Citation

Dataset Originator/Creator: Carol Kendall Bryan E. Bemis Scott D. Wankel

Dataset Title: Everglades Isotope Data

Dataset Release Date: 2005

Data Presentation Form: spreadsheet

Online Resource: http://sofia.usgs.gov/exchange/kendall_isotope/kendallisotope.html

Temporal Coverage

Start Date: 1995-03-01

Stop Date: 1999-10-31

Location Keywords

CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA

CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > FLORIDA

Science Keywords

BIOSPHERE > TERRESTRIAL ECOSYSTEMS > WETLANDS

TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > CONTAMINANTS

ISO Topic Category

BIOTA

ENVIRONMENT

INLAND WATERS

Project

USGS_SOFIA > South Florida Information Access

Access Constraints None

Use Constraints These data are subject to change and are not citeable until reviewed and approved for official publication.

Ancillary Keywords

Broward County

Collier County

Data Set Progress

COMPLETE

Data Center

SOUTH FLORIDA INFORMATION ACCESS, FLORIDA INTEGRATED SCIENCE CENTER, U.S. GEOLOGICAL SURVEY, U.S. DEPARTMENT OF THE INTERIOR

Data Center URL: http://sofia.usgs.gov/

Data Center Personnel
Name: HEATHER S. HENKEL Phone: 727.803.8747 ext. 3028 Fax: 727.803.2032 Email: hhenkel at usgs.gov Contact Address: USGS-FISC-St. Petersburg 600 Fourth St. South City: St. Petersburg Province or State: FL Postal Code: 33701 Country: USA

Distribution

Distribution Format: MS Excel

Fees: None

Personnel

CAROL KENDALL

Role: TECHNICAL CONTACT

Phone: 650-329-4576

Fax: 650-329-5590

Email: ckendall at usgs.gov

Contact Address:

U.S. Geological Survey

345 Middlefield Road, MS 434

City: Menlo Park

Province or State: CA

Postal Code: 94025

Country: USA

ALICIA ALEMAN

Role: DIF AUTHOR

Email: alicia.m.aleman at nasa.gov

Contact Address:

Goddard Space Flight Center

Code 610.2

City: Greenbelt

Province or State: MD

Postal Code: 20771

Country: USA

Publications/References

Haitzer, M., Aiken, G. R.; Ryan, J. N., 2002, Binding of Mercury (II) to Dissolved Organic Matter: The Role of the Mercury-to-DOM Concentration Ration, Environmental Science and Technology, v. 36, Washington, DC, American Chemical Society, The entire paper is available from the Environmental Science and Technology Journal web site; however, a journal subscription is required.
...

Creation and Review Dates

DIF Creation Date: 2008-01-23

Last DIF Revision Date: 2009-06-02

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