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Microbial Indexing of Saltmarsh Health and Recovery: Development of a Health/Productivity Scale
PIs: Marc Frischer (Skidaway Institute of Oceanography, Savannah, GA), Jeffrey King (US Army Corps/Adjunct SkIO), Carla Curran (Savannah State Univ., GA), and Dionne Hoskins (Savannah State Univ., GA)
Support: Georgia Coastal Management Program (through a Coastal Incentive Grant)
Timeframe: 2004 - 2006
Efforts focus on four marsh sites representing the range of marsh health endpoints, Oatland Island (pristine), Isle of Hope (recovered die-back area), Delegal Marina (recovering die-back area), and Elba Island (constructed saltmarsh).
Laboratory analyses of 8 independent samples from 4 sites during the spring and summer included:
Initial quantitative multivariate regression and qualitative principle component analysis models were developed.
Results of these models indicate that the 4 variables (porewater concentration of NH4, NO3/NO2, PO4, and the ratio of total bacterial respiration rates to sulfate reduction rates) can be used to evaluate marsh health status. Furthermore, these models indicate that seasonal difference in plant growth during the spring/summer growing season provides a good indicator of marsh health. Development of a quantitative discriminant factor analysis model is ongoing.
Publications and Presentations:
Fogleman, T. and M.C. Curran. 2006. Save our salt marshes! Using educational brochures to increase student awareness of salt marsh ecology. Current: The Journal of Marine Education 22:23-25.
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|This page was updated September 1, 2009|