Current Search: ("jvoss2@fau.edu") (x) » Hanisak, M. Dennis (x)
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Title
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Investigating Algal Symbionts in Corals From St. Lucie Reef, Florida.
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Creator
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Polinski, Jennifer, Voss, Joshua, Harbor Branch Oceanographic Institute
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Abstract/Description
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Algal symbionts, commonly called zooxanthellae, living in within coral tissues provide energy to hermatypic corals through photosynthesis. Zooxanthellae density, as well as photosynthetic pigment concentration, can be used as an indicator of coral health. This study compared zooxanthellae densities and concentrations of chlorophyll a and c between four sites and two species of coral, Montastraea cavemosa and Diploria clivosa, found at the St. Lucie Reef to establish baseline levels for...
Show moreAlgal symbionts, commonly called zooxanthellae, living in within coral tissues provide energy to hermatypic corals through photosynthesis. Zooxanthellae density, as well as photosynthetic pigment concentration, can be used as an indicator of coral health. This study compared zooxanthellae densities and concentrations of chlorophyll a and c between four sites and two species of coral, Montastraea cavemosa and Diploria clivosa, found at the St. Lucie Reef to establish baseline levels for comparison to future levels. No significant differences were found among sites despite increasing depth farther from the inlet, suggesting reduced light penetration closer to the inlet. Significant differences were found for zooxanthellae densities and chlorophyll concentrations per zooxanthellae cell between coral species. However, there was no significant difference for chlorophyll concentrations per unit area of coral tissue between species. This suggests that all site locations experience similar conditions despite differences in depth. It also suggests potentially different types of zooxanthellae, which is being addressed by ongoing research.
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Date Issued
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2013
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PURL
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http://purl.flvc.org/fau/fd/FA00002679
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Format
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Document (PDF)
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Title
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Investigating Coral Bacterial Communities in the Flower Garden Banks.
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Creator
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Alker, Amanda, Voss, Joshua, Harbor Branch Oceanographic Institute
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Abstract/Description
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Mesophotic reefs have historically been understudied, leading to a dearth of information on the corals that compose these reefs. Recent advancements in technology have enabled researchers to have greater access to reefs at mesophotic depths, generating a greater interest in the microbial communities in both mesophotic and shallow reefs, in order to determine the relative bacterial community differences. Samples of coral mucus from Montastraea cavernosa were collected from Flower Garden Banks...
Show moreMesophotic reefs have historically been understudied, leading to a dearth of information on the corals that compose these reefs. Recent advancements in technology have enabled researchers to have greater access to reefs at mesophotic depths, generating a greater interest in the microbial communities in both mesophotic and shallow reefs, in order to determine the relative bacterial community differences. Samples of coral mucus from Montastraea cavernosa were collected from Flower Garden Banks National Marine Sanctuary (FGBNMS) in the summer of2010 and 2011. Bacterial community DNA was extracted from the coral mucus and amplified using LH-PCR. Length Heterogeneity PCR is a technique used to amplify the hypervariable Vl and V2 region of the 16s rRNA gene in order to detennine relative base pair length and abundance of microbial connnunities. During the PCR product verification, contamination became apparent in the gel. Through contamination troubleshooting, the source was determined; however, not soon enough to continue with analyzing the samples. This project will be continued in the future in order to add to the mesophotic bacterial community database. The DNA extraction protocol frequently utilized in the laboratory will be modified to increase DNA yields, PCR conditions will be optimized, and the samples will be fully analyzed.
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Date Issued
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2013
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PURL
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http://purl.flvc.org/fau/fd/FA00002668
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Format
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Document (PDF)
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Title
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Assessment of coral stressors on St. Lucie reef: Florida’s northernmost coral reef.
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Creator
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Beal, Jeff, Voss, Joshua, Edge, Sara, Cohen, Lisa
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Date Issued
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2012-02
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PURL
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http://purl.flvc.org/fcla/dt/3360203
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Subject Headings
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Corals Effect of stress on, Corals--Florida, Coral reef ecology
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Format
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Document (PDF)
