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effects of flow on phosphorus uptake by periphyton
Title
The effects of flow on phosphorus uptake by periphyton.
Creator
Simmons, Steven P., Florida Atlantic University, Volin, John C.
Abstract/Description
Everglades restoration includes construction of six Stormwater Treatment Areas (STAs) totaling over 16,000 hectares. These filter marshes are designed to remove excess phosphorus from agricultural runoff and urban wastewater before it reaches the Everglades. Optimizing flow through these wetlands may be important in increasing the efficiency of nutrient removal and achieving lower outflow phosphorus concentrations. We measured periphyton growth and phosphorus uptake in two sets of replicated...
Show moreEverglades restoration includes construction of six Stormwater Treatment Areas (STAs) totaling over 16,000 hectares. These filter marshes are designed to remove excess phosphorus from agricultural runoff and urban wastewater before it reaches the Everglades. Optimizing flow through these wetlands may be important in increasing the efficiency of nutrient removal and achieving lower outflow phosphorus concentrations. We measured periphyton growth and phosphorus uptake in two sets of replicated mesocosms in post-STA treatment water. Flow rates for the study were 1.0 cm s^-1 and 0.11 cm s^-1. Unique mesocosm design allowed for simultaneous control of loading rate, retention time and surface area, leaving flow rate as the single variable between treatments. Periphyton biomass accrual was 25% greater in the faster treatment. Measurements of dissolved oxygen were positively correlated with biomass accrual and there was no significant difference in the export of biomass between treatments.
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Date Issued
2001
PURL
http://purl.flvc.org/fcla/dt/12764
Subject Headings
Periphyton, Water--Phosphorus content--Florida--Everglades
Format
Document (PDF)
Comparison of chemotaxonomic methods for the determination of periphyton community composition
Title
Comparison of chemotaxonomic methods for the determination of periphyton community composition.
Creator
Browne, Jamie L., Charles E. Schmidt College of Science, Department of Chemistry and Biochemistry
Abstract/Description
Pigment-based chemotaxonomy uses relative amounts of photosynthetic pigments (biomarkers) within algae samples to determine the algal class composition of each sample. Chemotaxonomy has been applied successfully to phytoplankton communities, but its efficacy for periphyton has not yet been established. This study examined the ability of simultaneous linear equations (SLE), CHEMTAX, and the Bayesian Compositional Estimator (BCE) to determine algal class composition in Florida Everglades...
Show morePigment-based chemotaxonomy uses relative amounts of photosynthetic pigments (biomarkers) within algae samples to determine the algal class composition of each sample. Chemotaxonomy has been applied successfully to phytoplankton communities, but its efficacy for periphyton has not yet been established. This study examined the ability of simultaneous linear equations (SLE), CHEMTAX, and the Bayesian Compositional Estimator (BCE) to determine algal class composition in Florida Everglades periphyton. The methods were applied to artificial datasets, mixed lab cultures of known composition, and Everglades periphyton samples for which microscopic biovolume data was available. All methods were able to return accurate sample compositions for artificial data and mixed lab cultures. Correlation between pigment methods and microscopic results for natural periphyton samples was poor. SLE and CHEMTAX returned similar results for all samples while BCE performed less well.
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Date Issued
2010
PURL
http://purl.flvc.org/FAU/2100582
Subject Headings
Water quality biological assessment, Periphyton, Water, Phosphorus content, Freshwater algae
Format
Document (PDF)
effects of flow on the taxonomic composition of Everglades periphyton
Title
The effects of flow on the taxonomic composition of Everglades periphyton.
Creator
Hiaasen, Barbara A., Florida Atlantic University, Volin, John C.
Abstract/Description
Analysis of the relationship of velocity to taxonomic composition of periphyton-based stormwater treatment areas, in conjunction with other metrics, is a valuable tool for evaluating the phosphorus removal efficiency of this Everglades restoration advanced treatment technology. Periphyton taxonomic composition, biomass, water and tissue total phosphorus (TP), pH, and temperature were analyzed in three slow velocity (0.22 cm s-1) and three fast velocity (2.0 cm s-1) mesocosms. Loading rate,...
Show moreAnalysis of the relationship of velocity to taxonomic composition of periphyton-based stormwater treatment areas, in conjunction with other metrics, is a valuable tool for evaluating the phosphorus removal efficiency of this Everglades restoration advanced treatment technology. Periphyton taxonomic composition, biomass, water and tissue total phosphorus (TP), pH, and temperature were analyzed in three slow velocity (0.22 cm s-1) and three fast velocity (2.0 cm s-1) mesocosms. Loading rate, retention time and surface area were kept constant, with velocity the single variable between treatments. There was no significant difference in taxonomic composition, water TP, tissue TP, or temperature between the slow and fast treatments. However, dominant eutrophic and oligotrophic indicator genera exhibited significant and consistent changes in relative abundance related to location along the treatment path. Biomass accrual was 30% greater in the fast treatment and TP uptake was positively correlated with increased velocity.
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Date Issued
2003
PURL
http://purl.flvc.org/fcla/dt/13056
Subject Headings
Periphyton--Florida--Everglades, Water--Phosphorus content--Florida--Everglades
Format
Document (PDF)
effect of canopy shading on relative primary productivity of periphyton in Water Conservation Area 2-A, Everglades
Title
The effect of canopy shading on relative primary productivity of periphyton in Water Conservation Area 2-A, Everglades.
Creator
Brandenburg, Mark Eric., Florida Atlantic University, Marsh, G. Alex
Abstract/Description
Differences in relative primary productivity of periphyton were determined for three light regimes: open slough (control), sawgrass canopy, and cattail canopy. The center of Water Conservation Area 2-A, Everglades was chosen as the study site because it is relatively unaffected by nutrient runoff. Periphyton productivity was determined by the light and dark bottle method, and biomass was recorded as ash-free dry weight. Statistically significant correlations were found between periphyton...
Show moreDifferences in relative primary productivity of periphyton were determined for three light regimes: open slough (control), sawgrass canopy, and cattail canopy. The center of Water Conservation Area 2-A, Everglades was chosen as the study site because it is relatively unaffected by nutrient runoff. Periphyton productivity was determined by the light and dark bottle method, and biomass was recorded as ash-free dry weight. Statistically significant correlations were found between periphyton biomass and water temperature and between organic content and water temperature. Mean photosynthetically active radiation reaching the surface of the water under sawgrass and cattail canopy was 45% $\pm$ 3% and 11% $\pm$ 1% respectively. Relative primary productivity of periphyton was lower under cattail canopy than under sawgrass canopy due to increased shading of cattail. This reduction of periphyton biomass and primary productivity can be considered an indirect effect of nutrient enrichment from the Everglades Agricultural Area.
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Date Issued
1996
PURL
http://purl.flvc.org/fcla/dt/15240
Subject Headings
Freshwater algae--Florida--Everglades, Periphyton--Florida--Everglades, Stream ecology--Florida--Everglades, Primary productivity (Biology)--Florida--Everglades, Plant communities--Florida--Everglades, Everglades (Fla )
Format
Document (PDF)