Historical Changes in Salinity, Water Quality, and Vegetation in Biscayne BayEntry ID: USGS_SOFIA_hist_salinity_wq_veg_bb_04
Abstract: The objectives of this project are to examine in broad context the historical changes in the Biscayne Bay ecosystem at selected sites on a decadal-centennial scale, and to correlate these changes with natural events and anthropogenic alterations in the South Florida region. Specific emphasis will be placed on historical changes to 1) amount, timing, and sources of freshwater influx and the ... resulting effects on salinity and water quality; 2) shoreline and sub-aquatic vegetation; and 3) the relationship between sea-level change, onshore vegetation, and salinity. In addition, a detailed examination of historical seasonal salinity patterns will be derived from biochemical analyses of molluscs, ostracodes, foraminifera and corals. The corals will allow us to compare marine and estuarine trends, examine the linkage between the two systems, and will provide precise chronological control. Land management agencies (principally SFWMD, ACOE and Biscayne NP) can use the data derived from this project to establish performance criteria for restoring natural flow, and to understand the consequences of altered flow. These data can also be used to forecast potential problems as upstream changes in water delivery are made during restoration.
During the last century, Biscayne Bay has been greatly affected by anthropogenic alteration of the environment through urbanization of the Miami/Dade County area, and alteration of natural flow. The sources, timing, delivery, and quality of freshwater flow into the Bay, and the shoreline and sub-aquatic vegetation have changed. Current restoration goals are attempting to restore natural flow of fresh water into Biscayne and Florida Bays and to restore the natural vegetation, but first we must address of what the was environment prior to significant human alteration in order to establish targets for restoration. This project is designed to examine the natural patterns of temporal change in salinity, water quality, vegetation, and benthic fauna in Biscayne Bay over the last 100-300 years and to examine the causes of change.
Data Set Citation
Dataset Originator/Creator: G. Lynn Brewster-Wingard Thomas Cronin; Debra Willard; Charles Holmes; William Orem; Peter Swart; Gary Dwyer; Scott Ishman; Evelyn Gaiser
Dataset Title: Historical Changes in Salinity, Water Quality, and Vegetation in Biscayne Bay
Dataset Release Date: 2007
Data Presentation Form: databaseOnline Resource: http://sofia.usgs.gov/projects/historical_change/
Start Date: 1994-02-24Stop Date: 2007-04-03
ISO Topic Category
Quality The values provided in spatial and temporal coverage are approximate only.
We propose a broadband seismic transect across the northern flank of the Gamburtsev Mountains in the heart of East Antarctica. The line of 6 earthquake recorders between the southern Lambert Glacier region and the ice topographic 'high' at Dome Argus would form part of a flagship ... multi-nation IPY program. Previous seismic stations at Wilson Bluff and Grove Mountains would also be reoccupied with a further station being deployed at a possible plateau field camp: a total of 9 Australian stations. The collaborating US group proposes a complementary line of 10 stations across the Dome Argus region together with further 8 US stations spaced between 75 and 83 degrees south across the Gamburtsev Mountains.
The Gamburtsev Mountains (GM) are a major structural feature of Antarctica, although they are entirely subglacial and have not been systematically studied since their discovery in the IGY of 1957-58. They show some of the highest sub-ice elevations on the continent (2500 m) and are likely to have been the nucleus for the first Cenozoic glaciers initiated at 34 Ma. No geological samples have ever been obtained from the GM and their geological history is unconstrained. Australia and East Antarctica were former neighbours prior to the breakup of Gondwana, and hence the tectonic history of the GM has significant implications for interpretations of the geology observed in west and south Australia
In addition to the seismic stations deployed by collaborative partners from the US, further seismic recording stations will be operated in East Antarctica by Chinese, German, Italian, Japanese and Russian scientists over the same time interval. Parallel submissions have been made to national research agencies for complementary aerogeophysical surveying. The US and Australian seismic transects constitute logical stand-alone scientific objectives should other components experience delays or cancellations.
Taken from the 2008-2009 Progress Report:
This project was not carried out owing to the project not being successful in the 2008 ARAC committee funding round and no logistic support being offered for the 2008/09 season.
Access Constraints These data are not yet publicly available.
Use Constraints This data set conforms to the PICCCBY Attribution License
Please follow instructions listed in the citation reference provided at the URL below when using these data.
Data Set Progress
Role: TECHNICAL CONTACT
Phone: +61 3 6226 2477
Email: anya.reading at utas.edu.au
University of Tasmania
City: Sandy Bay
Province or State: Tasmania
Postal Code: 7005
Role: DIF AUTHOR
Phone: +61 3 6232 3244
Fax: +61 3 6232 3351
Email: dave.connell at aad.gov.au
Australian Antarctic Division 203 Channel Highway
Province or State: Tasmania
Postal Code: 7050
Reading, A.M. and Heintz, M. (2008), Seismic anisotropy of East Antarctica from shear-wave splitting: spatially varying contributions from lithospheric structural fabric and mantle flow?, Earth and Planetary Science Letters, 268, 433-443
Reading, A.M. (2008), Bouncing Continents: Insights into the physics of the polar regions of the Earth from the IPY POLENET initiative., Physics Education, 43, 383-391
Fishwick, S. and Reading, A.M. (2008), Anomalous lithosphere beneath the Proterozoic of western and central Australia: A record of continental collision and intraplate deformation?, Precambrian Research, 166, 111-121
Creation and Review Dates
DIF Creation Date: 2008-06-16
Last DIF Revision Date: 2011-06-16