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An unrecognized ancient lineage of green plants persists in deep marine waters
Title
An unrecognized ancient lineage of green plants persists in deep marine waters.
Creator
Zechman, F. W., Verbruggen, H., Leliaert, F., Ashworth, M., Buchheim, M. A., Fawley, M. W., Spalding, H., Pueschel, C. M., Buchheim, J. A., Verghese, B., Hanisak, M. Dennis
Date Issued
2010
PURL
http://purl.flvc.org/FCLA/DT/3174108
Subject Headings
Marine plants, Marine flora
Format
Document (PDF)
Biomass production by marine and freshwater plants
Title
Biomass production by marine and freshwater plants.
Creator
Ryther, John H., Williams, Lavergne D., Hanisak, M. Dennis, Stenberg, Richard W., DeBusk, T. A.
Date Issued
1979
PURL
http://purl.flvc.org/fau/fd/FA00007325
Subject Headings
Biomass, Gracilaria, Water hyacinth, Hydrilla, Freshwater plants, Marine plants
Format
Document (PDF)
Biomass production by some marine and freshwater plants
Title
Biomass production by some marine and freshwater plants.
Creator
Ryther, John H., Hanisak, M. Dennis, Stenberg, Richard W., DeBusk, T. A.
Date Issued
1978
PURL
http://purl.flvc.org/fau/fd/FA00007132
Subject Headings
Biomass, Marine plants, Freshwater plants, Gracilaria, Water hyacinth, Lemna minor
Format
Document (PDF)
Effects of simulated saltwater intrusions on the growth and survival of Wild Celery, Vallisneria americana, from the Caloosahatchee Estuary (South Florida)
Title
Effects of simulated saltwater intrusions on the growth and survival of Wild Celery, Vallisneria americana, from the Caloosahatchee Estuary (South Florida).
Creator
Doering, Peter H., Chamberlain, Robert H., McMunigal, J. Michael, Harbor Branch Oceanographic Institute
Date Issued
2001
PURL
http://purl.flvc.org/FCLA/DT/3173001
Subject Headings
American wildcelery --Ecology, Angiosperms, Marine plants, Plant ecology, Simulation
Format
Document (PDF)
Sustained high yields of Gracilaria (Rhodophyta) grown in intensive large-scale culture
Title
Sustained high yields of Gracilaria (Rhodophyta) grown in intensive large-scale culture.
Creator
Capo, Thomas R., Jaramillo, Juan C., Boyd, Albert E., Lapointe, Brian E., Serafy, Joseph E.
Date Issued
1999
PURL
http://purl.flvc.org/FCLA/DT/2782530
Subject Headings
Algae, Functional foods, Aquaculture, Marine plants
Format
Document (PDF)
Methane production from the anaerobic digestion of some marine macrophytes
Title
Methane production from the anaerobic digestion of some marine macrophytes.
Creator
Habig, C., Ryther, John H., Harbor Branch Oceanographic Institute
Date Issued
1983
PURL
http://purl.flvc.org/FCLA/DT/3331836
Subject Headings
Methane, Biogas, Biomass, Marine plants, Digester gas
Format
Document (PDF)
Relocation movement in a stalked crinoid (Echinodermata)
Title
Relocation movement in a stalked crinoid (Echinodermata).
Creator
Messing, Charles G., RoseSmyth, M. Christine, Mailer, Stuart R., Miller, John E., Harbor Branch Oceanographic Institute
Date Issued
1988
PURL
http://purl.flvc.org/FCLA/DT/3172779
Subject Headings
Crinoidea, Echinodermata, Hydrography, Plant growing media, Marine invertebrates
Format
Document (PDF)
Motile epifauna of marine macrophytes in the Indian River Lagoon, Florida. I. Comparisons among three species of seagrasses from adjacent beds
Title
Motile epifauna of marine macrophytes in the Indian River Lagoon, Florida. I. Comparisons among three species of seagrasses from adjacent beds.
Creator
Virnstein, Robert W., Howard, Robert K., Harbor Branch Oceanographic Institute
Date Issued
1987
PURL
http://purl.flvc.org/FCLA/DT/3172769
Subject Headings
Seagrasses --Habitat, Benthic animals, Marine invertebrates, Aquatic plants, Biomass
Format
Document (PDF)
Motile epifauna of marine macrophytes in the Indian River Lagoon, Florida. II. Comparisons between drift algae and three species of seagrasses
Title
Motile epifauna of marine macrophytes in the Indian River Lagoon, Florida. II. Comparisons between drift algae and three species of seagrasses.
Creator
Virnstein, Robert W., Howard, Robert K., Harbor Branch Oceanographic Institute
Date Issued
1987
PURL
http://purl.flvc.org/FCLA/DT/3172772
Subject Headings
Seagrasses --Habitat, Benthic animals, Marine invertebrates, Aquatic plants, Biomass, Algae
Format
Document (PDF)
Blade abandonment/proliferation: a novel mechanism for rapid epiphyte control in marine macrophytes
Title
Blade abandonment/proliferation: a novel mechanism for rapid epiphyte control in marine macrophytes.
Creator
Littler, Mark M., Littler, Diane S., Harbor Branch Oceanographic Institute
Date Issued
1999
PURL
http://purl.flvc.org/FCLA/DT/3172820
Subject Headings
Marine algae culture, Plant-water relationships, Plant ecology, Coral reef ecology, Seagrasses --Habitat
Format
Document (PDF)
Light intensity influences on algal pigments, proteins and carbohydrates
Title
Light intensity influences on algal pigments, proteins and carbohydrates: implications for pigment-based chemotaxonomy.
Creator
Grant, Cidya S., Charles E. Schmidt College of Science, Department of Chemistry and Biochemistry
Abstract/Description
Phytoplankton Chlorophyll a (CHLa), total protein, colloidal carbohydrates, storage carbohydrates and taxonomic pigment relationships were studied in two cyanophytes (Microcystis aeruginosa and Synnechococcus elongatus), two chlorophytes (Dunaliella tertiolecta and Scenedesmus quadricauda), one cryptophyte (Rhodomonas salina), two diatoms (Cyclotella meneghiniana and Thalassiosira weissflogii) and one dinophyte (Amphidinium carterae) to assess if algal biomass could be expressed in other...
Show morePhytoplankton Chlorophyll a (CHLa), total protein, colloidal carbohydrates, storage carbohydrates and taxonomic pigment relationships were studied in two cyanophytes (Microcystis aeruginosa and Synnechococcus elongatus), two chlorophytes (Dunaliella tertiolecta and Scenedesmus quadricauda), one cryptophyte (Rhodomonas salina), two diatoms (Cyclotella meneghiniana and Thalassiosira weissflogii) and one dinophyte (Amphidinium carterae) to assess if algal biomass could be expressed in other indices than just chlorophyll a alone. Protein and carbohydrates are more useful currencies for expressing algal biomass, with respect to energy flow amongst trophic levels. These phytoplankton were grown at low light (LL = 37 (So(Bmol photons m-2 s-1), medium light (ML = 70-75 (So(Bmol photons m-2 s-1), and high light (HL= 200 (So(Bmol photons m-2 s-1)., Even though pigment per cell increased with increasing light intensity, statistically light had very little effect on the CHL a : taxonomic marker pigment ratios, as they covaried in the same way. Protein, colloidal carbohydrates and storage carbohydrates per cell all increased with increasing light intensity, but they did not covary with CHLa. Statistical data showed that light intensity had a more noticeable effect on protein: CHL a, colloidal carbohydrate: CHLa, storage CHO: CHLa, therefore a general mathematical expression for these relationships cannot be generated. This study showed that light intensity does have an influence on these biomass indices, therefore, seasonal and latitudinal formulas may be required for meaningful algal biomass estimation. However, more studies are needed if that goal is to be realized., While studying the effects of light intensity on algal pigment content and concentration, a new pigment was isolated from a cyanophyte (Scytonema hofmanii) growing between 300-1800 (So(Bmol photons¨m-2¨s-1 and from samples collected in areas of the Florida Everglades. This pigment was characterized and structurally determined to possess indolic and phenolic subunits that are characteristic of scytonemin and its derivatives. In addition, the pigment has a ketamine functionality which gives it its unique polarity and spectral properties. Based on the ultra violet/visible absorbance data, this pigment was postulated to be protecting the chlorophyll a and cytochrome Soret bands as well as a and (Sb (Bbands of the cytochromes (e.g. cytc-562) in the photosynthetic unit.
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Date Issued
2011
PURL
http://purl.flvc.org/FAU/3332257
Subject Headings
Plant pigments, Analysis, Photosynthetic pgiments, Analysis, Plant allometry, Enviornmental geochemistry, Marine algae, Analysis
Format
Document (PDF)
Biomonitoring of hypoxia and sulfide stress in three sub-tropical seagrasses
Title
Biomonitoring of hypoxia and sulfide stress in three sub-tropical seagrasses.
Creator
Irwin, Connor., Charles E. Schmidt College of Science, Department of Biological Sciences
Abstract/Description
Hypoxia and sulfide exposure, increased using glucose, are considered major environmental stressors in seagrass communities. Quantum efficiency, total soluble protein and catalase activity were quantified to evaluate the applicability of each of these bioindicators to detect environmental stress in three tropical seagrass species, Thalassia testudinum (Banks ex Kèoenig), Halodule wrightii (Ascherson) and Syringodium filiforme (Kuetz). Hypoxia + sulfide treatments significantly decreased the...
Show moreHypoxia and sulfide exposure, increased using glucose, are considered major environmental stressors in seagrass communities. Quantum efficiency, total soluble protein and catalase activity were quantified to evaluate the applicability of each of these bioindicators to detect environmental stress in three tropical seagrass species, Thalassia testudinum (Banks ex Kèoenig), Halodule wrightii (Ascherson) and Syringodium filiforme (Kuetz). Hypoxia + sulfide treatments significantly decreased the quantum efficiency of all three species, but showed no response in protein and catalase activity. Although no treatment effect was found, catalase activity was enhanced in T. testudinum leaves and H. wrightii roots relative to other tissues, while S. filiforme showed no location-specific catalase activity. These results indicate that quantum efficiency is a more sensitive indicator than protein and catalase activity to hypoxia and sulfide stress in seagrasses.
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Date Issued
2010
PURL
http://purl.flvc.org/FAU/2976445
Subject Headings
Plant physiology, Environmental management, Seagrasses, Habitat, Environmental aspects, Sulfites, Physiological effect, Marine ecology
Format
Document (PDF)
Photosynthetic pigment ratios in relation to Photic Flux
Title
Photosynthetic pigment ratios in relation to Photic Flux.
Creator
Grant, Cidya S., Louda, J. William, Florida Atlantic University
Abstract/Description
The molar and weight ratios of the photosynthetic pigments of ten algal species were analyzed in an attempt to determine if knowledge of the light field could be used to give better ratios for estimating the chlorophyll a contributed from each algal division to total chlorophyll a or biomass. High performance liquid chromatography (HPLC) is one of the tools used in pigment-based chemotaxonomy for estimating the biomass of algal communities by determining the concentrations of the various...
Show moreThe molar and weight ratios of the photosynthetic pigments of ten algal species were analyzed in an attempt to determine if knowledge of the light field could be used to give better ratios for estimating the chlorophyll a contributed from each algal division to total chlorophyll a or biomass. High performance liquid chromatography (HPLC) is one of the tools used in pigment-based chemotaxonomy for estimating the biomass of algal communities by determining the concentrations of the various chlorophylls and carotenoids. Stable ratios of chlorophyll a: marker pigment are used as multiplying factors for calculating the amount of chlorophyll a contributed from each major algal group to total chlorophyll a. Stable chlorophyll a : marker pigment ratios are not always easy to determine, so light field was investigated as a factor for determining consistently reliable ratios. This data will serve to determine new chlorophyll a: marker pigment ratios, as well as to verify or suggest changes to the existing ratios that are currently being used by our research group. An unknown pigment was isolated from Scytonema sp. grown in higher light fields and the ecological significance of this pigment was assessed.
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Date Issued
2006
PURL
http://purl.flvc.org/fau/fd/FA00000768
Subject Headings
Photosynthetic pigments--Analysis, Marine algae, Plant pigments--Analysis, High performance liquid chromatography
Format
Document (PDF)
Sulfur-35 incorporation in the seagrass Thalassia testudinum under oxic and anoxic conditions
Title
Sulfur-35 incorporation in the seagrass Thalassia testudinum under oxic and anoxic conditions.
Creator
Peters, Jasmine Star., Florida Atlantic University, Koch, Marguerite
Abstract/Description
Currently, there is a great deal of interest in the role of sulfur in the seagrass ecosystems and for sulfide, a known phytotoxin, in particular. This research used a 35S tracer technique to examine sulfur metabolism in the seagrass Thalassia testudinum. The uptake of the 35S radiotracer was documented at similar rates under both oxic and anoxic treatments. The highest total radioactivity was in root and rhizome tissue, as compared to the leaves. 35S translocation from roots to leaves was...
Show moreCurrently, there is a great deal of interest in the role of sulfur in the seagrass ecosystems and for sulfide, a known phytotoxin, in particular. This research used a 35S tracer technique to examine sulfur metabolism in the seagrass Thalassia testudinum. The uptake of the 35S radiotracer was documented at similar rates under both oxic and anoxic treatments. The highest total radioactivity was in root and rhizome tissue, as compared to the leaves. 35S translocation from roots to leaves was found to be more efficient in young versus mature leaves. Total sulfur uptake was estimated and found to be significantly different between root and rhizome tissue under oxic conditions. In the anoxic treatment, 1 mM sulfide may have been a threshold, at which the seagrass showed reduced uptake of 35S into the below-ground tissue. While the plants assisted in the production of sulfide in this experiment, sulfide accumulation may inhibit 35S uptake. This is counter to the idea of increased sulfide intrusion under sediment hypoxia. This study represents the first attempt to use 35S to trace sulfur incorporation into seagrass; further research will be required to understand the complex sulfur biochemistry of these important marine plants using this method.
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Date Issued
2006
PURL
http://purl.flvc.org/fcla/dt/13385
Subject Headings
Seagrasses--Ecology, Sulfates--Physiological effect, Plant morphology, Marine sediments
Format
Document (PDF)
Salinity Assessment, Change, and Impact on Plant Stress / Canopy Water Content (CWC) in Florida Bay using Remote Sensing and GIS
Title
Salinity Assessment, Change, and Impact on Plant Stress / Canopy Water Content (CWC) in Florida Bay using Remote Sensing and GIS.
Creator
Selch, Donna, Zhang, Caiyun, Florida Atlantic University, Charles E. Schmidt College of Science, Department of Geosciences
Abstract/Description
Human activities in the past century have caused a variety of environmental problems in South Florida. In 2000, Congress authorized the Comprehensive Everglades Restoration Plan (CERP), a $10.5-billion mission to restore the South Florida ecosystem. Environmental projects in CERP require salinity monitoring in Florida Bay to provide measures of the effects of restoration on the Everglades ecosystem. However current salinity monitoring cannot cover large areas and is costly, time-consuming,...
Show moreHuman activities in the past century have caused a variety of environmental problems in South Florida. In 2000, Congress authorized the Comprehensive Everglades Restoration Plan (CERP), a $10.5-billion mission to restore the South Florida ecosystem. Environmental projects in CERP require salinity monitoring in Florida Bay to provide measures of the effects of restoration on the Everglades ecosystem. However current salinity monitoring cannot cover large areas and is costly, time-consuming, and laborintensive. The purpose of this dissertation is to model salinity, detect salinity changes, and evaluate the impact of salinity in Florida Bay using remote sensing and geospatial information sciences (GIS) techniques. The specific objectives are to: 1) examine the capability of Landsat multispectral imagery for salinity modeling and monitoring; 2) detect salinity changes by building a series of salinity maps using archived Landsat images; and 3) assess the capability of spectroscopy techniques in characterizing plant stress / canopy water content (CWC) with varying salinity, sea level rise (SLR), and nutrient levels. Geographic weighted regression (GWR) models created using the first three imagery components with atmospheric and sun glint corrections proved to be more correlated (R^2 = 0.458) to salinity data versus ordinary least squares (OLS) regression models (R^2 = 0.158) and therefore GWR was the ideal regression model for continued Florida Bay salinity assessment. J. roemerianus was also examined to assess the coastal Everglades where salinity modeling is important to the water-land interface. Multivariate greenhouse studies determined the impact of nutrients to be inconsequential but increases in salinity and sea level rise both negatively affected J. roemerianus. Field spectroscopic data was then used to ascertain correlations between CWC and reflectance spectra using spectral indices and derivative analysis. It was determined that established spectral indices (max R^2 = 0.195) and continuum removal (max R^2= 0.331) were not significantly correlated to CWC but derivative analysis showed a higher correlation (R^2 = 0.515 using the first derivative at 948.5 nm). These models can be input into future imagery to predict the salinity of the South Florida water ecosystem.
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Date Issued
2016
PURL
http://purl.flvc.org/fau/fd/FA00004686, http://purl.flvc.org/fau/fd/FA00004686
Subject Headings
Environmental management, Florida Bay (Fla.), Geographic information systems, Geospatial data, Marine ecology, Plant water relationships, Remote sensing, Salinity -- Florida -- Florida Bay -- Measurement
Format
Document (PDF)