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Deep-water plant communities from an uncharted seamount off San Salvador Island, Bahamas: distribution, abundance, and primary productivity
Title
Deep-water plant communities from an uncharted seamount off San Salvador Island, Bahamas: distribution, abundance, and primary productivity.
Creator
Littler, Mark M., Littler, Diane S., Blair, Stephen M., Norris, James N., Harbor Branch Oceanographic Institute
Date Issued
1986
PURL
http://purl.flvc.org/FCLA/DT/3353774
Subject Headings
Plant communities, San Salvador Island (Bahamas), Deep-sea ecology, Primary productivity (Biology)
Format
Document (PDF)
distribution of plant communities in Fakahatchee Strand State Preserve, Florida
Title
The distribution of plant communities in Fakahatchee Strand State Preserve, Florida.
Creator
Whitley, William James, Florida Atlantic University, Austin, Daniel F.
Abstract/Description
The distribution of plant communities along a water level gradient was examined, in light of recent logging and fire history, in Fakahatchee Strand State Preserve. The dominance values of trees and shrub were used in cluster analysis to delineate plant communities. Qualitative data on logging and fire history was obtained by inspecting aerial photographs and surveillance in the field. Local water regime, as a function of topography, appears to be the most important factor associated with the...
Show moreThe distribution of plant communities along a water level gradient was examined, in light of recent logging and fire history, in Fakahatchee Strand State Preserve. The dominance values of trees and shrub were used in cluster analysis to delineate plant communities. Qualitative data on logging and fire history was obtained by inspecting aerial photographs and surveillance in the field. Local water regime, as a function of topography, appears to be the most important factor associated with the distribution of plant communities in Fakahatchee Strand. Logging of cypress and subsequent dominance of hardwoods has altered the species composition of most communities so that community types have become more distinct from one another. The species composition of plant communities has apparently been altered even more when severe fire followed logging.
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Date Issued
1991
PURL
http://purl.flvc.org/fcla/dt/14698
Subject Headings
Plant communities--Florida--Fakahatchee Strand State Preserve, Botany--Florida--Fakahatchee Strand State Preserve
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)
Vegetation time series analysis of the Loxahatchee Slough, Palm Beach County, Florida: A GIS incorporating satellite imagery with black and white aerial photography
Title
Vegetation time series analysis of the Loxahatchee Slough, Palm Beach County, Florida: A GIS incorporating satellite imagery with black and white aerial photography.
Creator
Hohner, Susan Marie., Florida Atlantic University, Roberts, Charles, Charles E. Schmidt College of Science, Department of Geosciences
Abstract/Description
The Loxahatchee Slough is the largest wilderness island refuge existing in Palm Beach County, Florida. Cultural impacts have altered the hydrology of the area. This study provides a database of historical and geographical information regarding the Slough. Aerial photography and satellite imagery from pre- and post-channelization dates are classified according to vegetation ecosystems. GIS analysis is used to compare these diverse data sets. Changes in hydroperiod are examined, using...
Show moreThe Loxahatchee Slough is the largest wilderness island refuge existing in Palm Beach County, Florida. Cultural impacts have altered the hydrology of the area. This study provides a database of historical and geographical information regarding the Slough. Aerial photography and satellite imagery from pre- and post-channelization dates are classified according to vegetation ecosystems. GIS analysis is used to compare these diverse data sets. Changes in hydroperiod are examined, using vegetation as an indicator. Results show a general trend toward dryer hydroperiod vegetation land cover. Since 1979, the Army Corps of Engineers has raised water levels back toward pre-channelization levels, in a portion of the study area known as the Historic Region. Results indicate a positive response, with a net increase of longer hydroperiod vegetation in this region since 1979.
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Date Issued
1994
PURL
http://purl.flvc.org/fcla/dt/15079
Subject Headings
Vegetation mapping--Florida--Palm Beach County, Plant communities--Remote sensing, Geographic information systems--Remote sensing, Aerial photography in geography--Florida--Palm Beach County, Swamp ecology--Florida--Palm Beach County
Format
Document (PDF)