Quantitative Habitat Characterization and Benthic Assemblage Structure of Deep-water Lophelia pertusa and Enallopsammia profunda Reefs off Eastern Florida

• Main Author: Shirur, Kartick Prakash
• Format: Others
• Published: NSUWorks 2008
• Subjects: Marine Biology; Oceanography and Atmospheric Sciences and Meteorology
• Online Access: http://nsuworks.nova.edu/occ_stuetd/106; http://nsuworks.nova.edu/cgi/viewcontent.cgi?article=1296&context=occ_stuetd

Eleven deep-sea coral sites off the eastern Florida coast were surveyed using the Johnson Sea Link I submersible from 8-18 November 2005. Seven of 14 dives contained usable transect data that were used to characterize benthic habitats and associated faunal assemblages. Forty-two taxa at various taxonomic levels were identified and their relative abundances and densities calculated. Coral Point Count with Excel extensions (CPCe) software was used to determine percent cover of substrate types. PRIMER-E was used to compare distributions of percent cover, and relative abundances and densities of organisms within and among sites. Distributions of some taxa were depth-related, while multiple factors appeared to be responsible for the distributions of others. Sites with relatively few dead standing coral colonies and high percentages of coral rubble, sediment and rocky substrates appeared to harbor similar assemblages. Overall organism densities correlated significantly with availability of hard substrates. Dead standing coral colonies did not affect organism density, but had a significant effect on assemblage composition at different sites.