Current Search:  Turtle grass (x)

View All Items

  • CSV Spreadsheet
(1 - 7 of 7)
Effects of natural and artificial Thalassia on rates of sedimentation
Title
Effects of natural and artificial Thalassia on rates of sedimentation.
Creator
Almasi, M. N., Hoskin, Charles M., Reed, John K.
Date Issued
1987
PURL
http://purl.flvc.org/fau/fd/FA00007149
Subject Headings
Sedimentation and deposition, Thalassia, Turtle grass, Seagrasses
Format
Document (PDF)
Comment on J. C. Zieman, J. W. Fourqurean, and T. A. Frankovich. 1999. Seagrass dieoff in Florida Bay: Long-term trends in abundance and growth of turtle grass, Thalassia testudinum. Estuaries 22:460–470
Title
Comment on J. C. Zieman, J. W. Fourqurean, and T. A. Frankovich. 1999. Seagrass dieoff in Florida Bay: Long-term trends in abundance and growth of turtle grass, Thalassia testudinum. Estuaries 22:460–470.
Creator
Lapointe, Brian E., Barile, Peter J.
Date Issued
2004
PURL
http://purl.flvc.org/FCLA/DT/3174865
Subject Headings
Seagrasses, Florida Bay (Fla.), Turtle grass, Estuaries
Format
Document (PDF)
QUANTITATIVE COMPARISON OF THE EPIFAUNA ON THALASSIA TESTUDINUM KONIG IN THREE HYDROGRAPHICALLY DISTINCT AREAS IN SOUTHERN FLORIDA
Title
A QUANTITATIVE COMPARISON OF THE EPIFAUNA ON THALASSIA TESTUDINUM KONIG IN THREE HYDROGRAPHICALLY DISTINCT AREAS IN SOUTHERN FLORIDA.
Creator
WALESKY, RICHARD EDWARD, Florida Atlantic University
Abstract/Description
The invertebrate macrofauna and algal epiphytes occurring on Thalassia in three hydrographically distinct areas in southern Florida were sampled during 14 June-21 June, 1974. A total of 178 invertebrate species was collected. The dominant non-colonial invertebrate taxa were Amphipoda, Isopoda, Mollusca, Polychaeta, and Tanaidacea. These groups included 93.8% of the fauna and 70.4% of the non-colonial invertebrate species. A relatively high faunal homogeneity was observed on each site....
Show moreThe invertebrate macrofauna and algal epiphytes occurring on Thalassia in three hydrographically distinct areas in southern Florida were sampled during 14 June-21 June, 1974. A total of 178 invertebrate species was collected. The dominant non-colonial invertebrate taxa were Amphipoda, Isopoda, Mollusca, Polychaeta, and Tanaidacea. These groups included 93.8% of the fauna and 70.4% of the non-colonial invertebrate species. A relatively high faunal homogeneity was observed on each site. Turbidity and the abundance of algal epiphytes were important environmental factors affecting the observed differences in the composition and density of the epifauna between sites. Similarities in diversity (H') between Chicken Key (2.75), Lake Surprise (2.89) and San Carlos Bay (2.93), were presumably due to equivalent substrates with similar degrees of environmental instability. The Thalassia epifauna showed a high degree of parallelism with the Zostera marina epifauna.
Show less
Date Issued
1976
PURL
http://purl.flvc.org/fcla/dt/13831
Subject Headings
Turtle grass, Hydrocharitaceae, Marine animals, Epiphytes
Format
Document (PDF)
Release of trace metals by sewage sludge and the subsequent uptake by members of a turtle grass mangrove ecosystem
Title
Release of trace metals by sewage sludge and the subsequent uptake by members of a turtle grass mangrove ecosystem.
Creator
Montgomery, John R., Price, Mary T., Harbor Branch Oceanographic Institute
Date Issued
1979
PURL
http://purl.flvc.org/FCLA/DT/3332932
Subject Headings
Thalassia testudinum, Turtle grass, Sewage sludge, Trace metals in the environment, Fouling organisms, Mangrove
Format
Document (PDF)
The influence of quantitative and qualitative aspects of habitat complexity in tropical sea-grass meadows
Title
The influence of quantitative and qualitative aspects of habitat complexity in tropical sea-grass meadows.
Creator
Stoner, Allan W., Lewis, F. Graham, III, Harbor Branch Oceanographic Institute
Date Issued
1985
PURL
http://purl.flvc.org/FCLA/DT/3353763
Subject Headings
Seagrasses, Thalassia testudinum, Turtle grass, Seagrasses--Habitat, Halimeda, Decapoda (Crustacea)
Format
Document (PDF)
INTERNAL OXYGEN DYNAMICS AND RHIZOSPHERE OXIDATION IN TROPICAL SEAGRASS, THALASSIA TESTUDINUM
Title
INTERNAL OXYGEN DYNAMICS AND RHIZOSPHERE OXIDATION IN TROPICAL SEAGRASS, THALASSIA TESTUDINUM.
Creator
Winn, Nathaniel, Koch-Rose, Marguerite, Florida Atlantic University, Department of Environmental Sciences, Charles E. Schmidt College of Science
Abstract/Description
Large-scale seagrass mortality events have been linked to internal hypoxia and exposure to phytotoxins in the sediment, such as hydrogen sulfide (H2S). Although seagrasses can transport oxygen (O2) to belowground tissues (rhizomes and roots) and into surrounding sediment to prevent H2S intrusion, reoccurring seagrass mortality events from H2S exposure continue. In the present study, I examined the potential of tropical seagrass Thalassia testudinum to transport O2 effectively to belowground...
Show moreLarge-scale seagrass mortality events have been linked to internal hypoxia and exposure to phytotoxins in the sediment, such as hydrogen sulfide (H2S). Although seagrasses can transport oxygen (O2) to belowground tissues (rhizomes and roots) and into surrounding sediment to prevent H2S intrusion, reoccurring seagrass mortality events from H2S exposure continue. In the present study, I examined the potential of tropical seagrass Thalassia testudinum to transport O2 effectively to belowground tissues and diffuse O2 into Florida Bay sediment around the root rhizosphere or sediment-root interface to constrain H2S diffusion into the roots. My approach was to (1) examine the spatial distribution of O2 in the rhizosphere during the light and dark with 2-D planar optode sensors, (2) examine patterns of root O2 loss (ROL) with O2 dye tracing experiments, and (3) measure O2 and H2S dynamics in internal tissues and rhizospheres. My results indicate that T. testudinum effectively sustains oxidation in belowground tissues to constrain H2S, but minimal evidence of ROL into the rhizosphere.
Show less
Date Issued
2023
PURL
http://purl.flvc.org/fau/fd/FA00014365
Subject Headings
Turtle grass Seagrasses, Thalassia testudinum, Hydrogen sulfide--Environmental aspects, Rhizosphere
Format
Document (PDF)
A Modeling Study on The Effects of Seagrass Beds on the Hydrodynamics in the Indian River Lagoon
Title
A Modeling Study on The Effects of Seagrass Beds on the Hydrodynamics in the Indian River Lagoon.
Creator
Habib, MD Ahsan, Jiang, Mingshun, Florida Atlantic University, College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
Abstract/Description
Seagrass is a key stone component for the Indian River Lagoon (IRL) ecosystem, and therefore it is an important topic for many studies in the lagoon. This study focuses on the effects of seagrass beds on the hydrodynamics in the IRL. A hydrodynamic model based on the Delft3D modeling system has been developed for the southern IRL including the St. Lucie estuary, Ft. Pierce and St. Lucie Inlets, and adjacent coastal waters. The model is driven by freshwater inputs from the watershed, tides,...
Show moreSeagrass is a key stone component for the Indian River Lagoon (IRL) ecosystem, and therefore it is an important topic for many studies in the lagoon. This study focuses on the effects of seagrass beds on the hydrodynamics in the IRL. A hydrodynamic model based on the Delft3D modeling system has been developed for the southern IRL including the St. Lucie estuary, Ft. Pierce and St. Lucie Inlets, and adjacent coastal waters. The model is driven by freshwater inputs from the watershed, tides, meteorological forcing, and oceanic boundary forcing. The model has been systematically calibrated through a series of numerical experiments for key parameters, particularly the bottom roughness, and configuration including heat flux formulation and bottom bathymetry. The model skills were evaluated with quantitative metrics (point-to-point correlation, root-mean-square difference, and mean bias) to gauge the agreements between model and data for key variables including temperature, salinity, and currents. A three-year (2013-2015) simulation has been performed, and the results have been validated with available data including observations at HBOI Land-Ocean Biogeochemistry Observatory (LOBO) stations and in situ measurements from various sources. The validated model is then used to investigate the effects of 1) model vertical resolution (total number of model vertical layers), 2) spatial variability of surface winds, and 3) seagrass beds on the simulated hydrodynamics. The study focuses on the vicinity of Ft. Pierce Inlet, where significant seagrass coverage can be found. A series of numerical experiments were performed with a combination of different configurations. Overall, the experiment with 2-dimensional (2-D) winds, ten vertical layers and incorporating seagrass provided the most satisfactory outcomes. Overall, both vertical resolution and spatial variability of surface winds affect significantly the model results. In particular, increasing vertical resolution improves model prediction of temperature, salinity and currents. Similarly, the model with 2-D winds yields more realistic results than the model forced by 0-D winds. The seagrass beds have significant effects on the model results, particularly the tidal and sub-tidal currents. In general, model results show that both tidal and sub-tidal currents are much weaker due to increase bottom friction from seagrass. For tidal currents, the strongest impacts lie in the main channel (inter-coastal waterway) and western part of the lagoon, where strong tidal currents can be found. Inclusion of seagrass in the model also improves the simulation of sub-tidal currents. Seagrass beds also affect model temperature and salinity including strengthening vertical stratification. In general, seagrass effects vary over time, particularly tidal cycle with stronger effects seen in flood and ebb tides, and seasonal cycle with stronger effects in the summer than in winter.
Show less
Date Issued
2016
PURL
http://purl.flvc.org/fau/fd/FA00004774, http://purl.flvc.org/fau/fd/FA00004774
Subject Headings
Turtle grass--Environmental aspects., Seagrasses--Ecology., Grassed waterways., Wave resistance (Hydrodynamics), Wetland ecology., Estuarine ecology., Estuarine restoration., Coastal zone management.
Format
Document (PDF)