Current Search: Biology, Botany (x)
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Title
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Growth dynamics of the seagrass Halophila johnsonii from a subtropical estuarine lagoon in southeastern Florida, United States of America.
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Creator
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Bolen, Layne Elizabeth, Florida Atlantic University, Charles E. Schmidt College of Science, Department of Biological Sciences
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Abstract/Description
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Biomass, net production, turnover, and decomposition of the seagrass Halophila johnsonii were studied in the Lake Worth Lagoon, Palm Beach County, Florida, USA. Biomass and apical meristem density averaged 8.0 g dry wt/m^2 and 1122/m^2, respectively. Mean net productivity was 0.00154 g dry wt/shoot/day or 0.45cm/shoot/day with one new leaf pair for every 0.97 cm of shoot growth. Estimated turnover time was 4.6 days. Mean weight loss in plant material was 72% after three days and 88% after...
Show moreBiomass, net production, turnover, and decomposition of the seagrass Halophila johnsonii were studied in the Lake Worth Lagoon, Palm Beach County, Florida, USA. Biomass and apical meristem density averaged 8.0 g dry wt/m^2 and 1122/m^2, respectively. Mean net productivity was 0.00154 g dry wt/shoot/day or 0.45cm/shoot/day with one new leaf pair for every 0.97 cm of shoot growth. Estimated turnover time was 4.6 days. Mean weight loss in plant material was 72% after three days and 88% after seven days. No evidence was found of sexual reproduction. Halophila johnsonii's growth dynamics in the intertidal and shallow subtidal zones are characterized by low biomass, substantial apical meristem density, regular leaf pair production, rapid turnover, and rapid decomposition. Halophila johnsonii's growth in these zones provides an additional level of biomass and detritus to the shallow lagoon system.
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Date Issued
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1997
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PURL
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http://purl.flvc.org/fcla/dt/15413
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Subject Headings
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Biology, Botany, Biology, Ecology
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Format
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Document (PDF)
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Title
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The effects of fire on the demographics of Neyraudia reynaudiana in the pine rocklands.
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Creator
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Rasha, Renee L'Hoste, Florida Atlantic University, Charles E. Schmidt College of Science, Department of Biological Sciences
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Abstract/Description
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This study is to further understand the effects of fire on the invasive Asian grass, Neyraudia reynaudiana in the south Florida pine rocklands, at Larry and Penny Thompson Park in Miami-Dade County. Urban surroundings, fire suppression, and Hurricane Andrew in 1992 required prescribed fire in the pine rocklands to prevent wildfires and succession into hardwood habitat. Neyraudia reynaudiana's rapid spread caused concern due to its resistance to herbicide. A main concern was that fire, which...
Show moreThis study is to further understand the effects of fire on the invasive Asian grass, Neyraudia reynaudiana in the south Florida pine rocklands, at Larry and Penny Thompson Park in Miami-Dade County. Urban surroundings, fire suppression, and Hurricane Andrew in 1992 required prescribed fire in the pine rocklands to prevent wildfires and succession into hardwood habitat. Neyraudia reynaudiana's rapid spread caused concern due to its resistance to herbicide. A main concern was that fire, which is a natural component of the pine rockland community, could enhance Neyraudia reynaudiana's spread. This study observed and measured Neyraudia reynaudiana regrowth in two plant communities at five times over one year after one treatment of prescribed fire. Two herbaceous plant inventories were taken one year apart. The study's results show that Neyraudia reynaudiana was enhanced by fire.
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Date Issued
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2000
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PURL
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http://purl.flvc.org/fcla/dt/12696
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Subject Headings
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Biology, Botany, Biology, Ecology, Agriculture, Forestry and Wildlife
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Format
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Document (PDF)
