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Anatomy of a red tide bloom off the southwest coast of Florida
Title
Anatomy of a red tide bloom off the southwest coast of Florida.
Creator
Yentsch, Charles S., Lapointe, Brian E., Poulton, N., Phinney, D. A.
Date Issued
2008
PURL
http://purl.flvc.org/FCLA/DT/3158780
Subject Headings
Dinoflagellates --Control --Florida, Marine algae, Chlorophyll, Red tide --Florida, Eutrophication
Format
Document (PDF)
Benthic coral reef algal communities at and near ship grounding sites in the Florida Keys National Marine Sanctuary
Title
Benthic coral reef algal communities at and near ship grounding sites in the Florida Keys National Marine Sanctuary.
Creator
Hanisak, M. Dennis, Overdorf, Laura S.
Date Issued
1998-01
PURL
http://purl.flvc.org/fcla/dt/3359251
Subject Headings
Florida Keys National Marine Sanctuary, Algae, Corals--Florida
Format
Document (PDF)
Comparative ecophysiology of bloom-forming macroalgae in the Indian River Lagoon, Florida
Title
Comparative ecophysiology of bloom-forming macroalgae in the Indian River Lagoon, Florida: Ulva lactuca (Chlorophyta), Hypnea musciformis, and Gracilaria tikvahiae (Rhodophyta).
Creator
Vlaming, Lisa N.A., Charles E. Schmidt College of Science, Department of Biological Sciences
Abstract/Description
Macroalgal blooms are responses to nutrient enrichment in shallow seagrass ecosystems like the Indian River Lagoon (IRL), Florida. Little is known about nitrogen (N) and phosphorus (P) limitation or the importance of morphological/physiological characteristics of bloom-forming macroalgae (Ulva lactuca, Hypnea musciformis, and Gracilaria tikvahiae) in the IRL. We hypothesized: 1) all species would proliferate in nutrient-rich Titusville, 2) opportunistic U. lactuca would dominate, 3) Rapid...
Show moreMacroalgal blooms are responses to nutrient enrichment in shallow seagrass ecosystems like the Indian River Lagoon (IRL), Florida. Little is known about nitrogen (N) and phosphorus (P) limitation or the importance of morphological/physiological characteristics of bloom-forming macroalgae (Ulva lactuca, Hypnea musciformis, and Gracilaria tikvahiae) in the IRL. We hypothesized: 1) all species would proliferate in nutrient-rich Titusville, 2) opportunistic U. lactuca would dominate, 3) Rapid Light Curves (RLCs) would assess nutrient status, and 4) nutrient concentrations would regulate growth more than N:P ratios. Field studies showed rapid biomass doubling times of 2 days (U. lactuca; November 2012) in urbanized Titusville. RLCs in a guano-enriched island off Big Pine Key (BPK) and Titusville (Ulva spp.) were similar due to P-saturation. Laboratory studies showed three-fold higher RLCs and two-fold faster growth at high nutrient concentrations of N and P. Reductions of both N and P will be required to moderate future blooms.
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Date Issued
2013
PURL
http://purl.flvc.org/fcla/dt/3361257
Subject Headings
Marine algae, Marine algae, Ecophysiology, Marine algae, Adaptation, Algal blooms
Format
Document (PDF)
Antimicrobial and antineoplastic activity in some South Florida seaweeds.
Title
Antimicrobial and antineoplastic activity in some South Florida seaweeds.
Creator
Hodgson, L. M., Harbor Branch Oceanographic Institute
Date Issued
1984
PURL
http://purl.flvc.org/fau/fd/FA00007020
Subject Headings
Marine algae--Florida, Antineoplastic agents, Antimicrobial agents, Seaweeds
Format
Document (PDF)
Productivity and Nutrition of Sargassum: A Comparative Ecophysiological Study of Benthic and Pelagic Species in Florida
Title
Productivity and Nutrition of Sargassum: A Comparative Ecophysiological Study of Benthic and Pelagic Species in Florida.
Creator
Feibel, Alison, Lapointe, Brian E., Florida Atlantic University, Charles E. Schmidt College of Science, Center for Environmental Studies
Abstract/Description
Benthic algal species receive elevated nitrogen (N) and phosphorus (P) availability as anthropogenic activities increase the loading of nutrients into coastal waters. Pelagic species could also be responding to this nutrient enrichment. This study compared the tissue nutrient content and productivity of three benthic and two pelagic species of Sargassum. We hypothesized that the benthic species would have a higher tissue nutrient content and productivity than the pelagic species and the...
Show moreBenthic algal species receive elevated nitrogen (N) and phosphorus (P) availability as anthropogenic activities increase the loading of nutrients into coastal waters. Pelagic species could also be responding to this nutrient enrichment. This study compared the tissue nutrient content and productivity of three benthic and two pelagic species of Sargassum. We hypothesized that the benthic species would have a higher tissue nutrient content and productivity than the pelagic species and the pelagic species would have a higher tissue nutrient content and productivity than historic data. The tissue nutrient content and net productivity of the benthic and pelagic species were not significantly different indicating that the pelagic species are receiving high levels of nutrient availability comparable to that of the benthic species. Pelagic species in the current study exhibited significantly higher N:P ratios and net productivity than the historic data, suggesting a shift from N to P limitation and increased productivity.
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Date Issued
2016
PURL
http://purl.flvc.org/fau/fd/FA00004695, http://purl.flvc.org/fau/fd/FA00004695
Subject Headings
Biotic communities, Environmental monitoring, Indicators (Biology), Marine algae -- Florida, Marine biology -- Florida, Sargassum
Format
Document (PDF)
Response of tropical marine macroalgae to thermal stress
Title
Response of tropical marine macroalgae to thermal stress.
Creator
Anderson, Brent C., Florida Atlantic University, Koch, Marguerite
Abstract/Description
Short-term increases in temperatures above 31°C have been shown to influence the structure and diversity of coral reefs through coral bleaching episodes, but quantitative information on how these thermal events affect macroalgae on coral reef communities has rarely been described. Using laboratory mesocosm experiments, I examined six species of commonly occurring macroalgae from two functional form groups on the Florida Keys reef tract to determine their temperature thresholds, quantified by...
Show moreShort-term increases in temperatures above 31°C have been shown to influence the structure and diversity of coral reefs through coral bleaching episodes, but quantitative information on how these thermal events affect macroalgae on coral reef communities has rarely been described. Using laboratory mesocosm experiments, I examined six species of commonly occurring macroalgae from two functional form groups on the Florida Keys reef tract to determine their temperature thresholds, quantified by the point at which photosynthesis, quantum yield (Fv/Fm), and mortality rates were significantly affected. Red crustose coralline sp., classified in the calcareous group, showed no significant changes in Fv/Fm, and experienced no mortality at elevated temperatures of 34°C. However, Halimeda incrassata, another calcareous species showed significant changes in photosynthesis at thermal treatments of 32°C, and experienced 75% mortality at 34°C. Sargassum fluitans, a branching fleshy macroalgae maintained photosynthetic rates up to 32°C, but at 34°C succumbed to 100% mortality. Laurencia chondroides, also a branching fleshy macroalgal form experienced 50% mortality at 34°C. My results, among the first high temperature experiments on dominant tropical macroalgae, indicate that macroalgae are more robust than corals (∼32°C) in their thermal tolerance, but have varying thresholds among species.
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Date Issued
2006
PURL
http://purl.flvc.org/fcla/dt/13394
Subject Headings
Marine algae--Florida--Florida Keys, Coral reef ecology--Florida--Florida Keys
Format
Document (PDF)
Deep-water benthic macroalgal communities with emphasis on Florida and the Bahamas
Title
Deep-water benthic macroalgal communities with emphasis on Florida and the Bahamas.
Creator
Hanisak, M. Dennis, Blair, Stephen M.
Date Issued
1988
PURL
http://purl.flvc.org/fau/fd/FA00007296
Subject Headings
Florida, Bahamas, Algal communities, Marine algae, Benthos, Johnson-Sea-Link II (Submarine)
Format
Document (PDF)
Phosphorus limitation in reef macroalgae of South Florida
Title
Phosphorus limitation in reef macroalgae of South Florida.
Creator
Kehler, Courtney., Charles E. Schmidt College of Science, Center for Environmental Studies
Abstract/Description
Nitrogen (N) has traditionally been regarded as the primary limiting nutrient to algal growth in marine coastal waters, but recent studies suggest that phosphorus (P) can be limiting in carbonate-rich environments. To better understand the importance of P. alkaline phosphatase activity (APA) was measured in reef macroalgae in seven counties of south Florida ; several significant trends emerged : 1) APA decreased geographically from the highest values in Dada>Monroe>Palm Beach>St. Lucie...
Show moreNitrogen (N) has traditionally been regarded as the primary limiting nutrient to algal growth in marine coastal waters, but recent studies suggest that phosphorus (P) can be limiting in carbonate-rich environments. To better understand the importance of P. alkaline phosphatase activity (APA) was measured in reef macroalgae in seven counties of south Florida ; several significant trends emerged : 1) APA decreased geographically from the highest values in Dada>Monroe>Palm Beach>St. Lucie>Broward>Martin>Lee counties 2) APA varied temporally with increasing nutrient-rich runoff in the wet season 3) APA varied due to taxonomic division Phaeophyta>Rhodophyta>Chlorophyta 4) Nutrient enrichment experiments demonstrated that increased N-enrichment enhanced P-limitation while increased P decreased P-limitation. These results suggest that high APA observed in carbonate-rich waters of Dade County and low APA in Broward County resulted from high nutrient inputs associated with anthropogenic nutrient pollution.
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Date Issued
2012
PURL
http://purl.flvc.org/FAU/3358598
Subject Headings
Nitrogen, Environmental aspects, Coral reef ecology, Coral reef biology, Marine algae, Physiology, Algal communities, Physiology
Format
Document (PDF)