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Green Canyon Lease Block 600 is a well-documented cold seep site characterized by near-perennial oil and gas slicks large enough to reach the sea surface and to be detected on satellite imagery. This site has been selected by the Ecosystem Impact of Oil and Gas Inputs to the Gulf consortium to study the impacts of natural hydrocarbon seepage versus anthropogenic inputs of hydrocarbons into the Gulf...
The deep reef refugia hypothesis (DRRH) suggests that mesophotic coral ecosystems (MCEs) represent a sanctuary for various coral reef taxa from impacts of natural and anthropogenic stressors. The Pulley Ridge FL mesophotic reef was surveyed using unmanned vehicles and technical diving in 2015 and compared to vehicle surveys in 2003, to test the DRRH. The MCE sites surveyed consisted of at least 25...
A set of Matlab tools were developed to create seafloor mosaics from AUV photosurveys. The resulting mosaic products are used to guide instrument placement, ground-truth acoustic backscatter targets, and inspect sensor packages or other targets. Because of the positional sensitivity of these tasks, effort has been made to preserve the geographic distribution of the image content. After initial image...
A photomosaicking technique was improved by incorporating data from multibeam bathymetry acquired simultaneously with the seafloor images. AUV navigation logs are used to geographically place the images, as has been previously documented. This revision accounts for navigation offset and drift by using multibeam processing tools to refine image placement. The processed bathymetric grid combined with...
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