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- W1977160293 abstract "The seafloor in the mouth of the Piscataqua River Estuary, near Portsmouth, New Hampshire, contains several geomorphological regions that are evident in bathymetric data from multibeam sonar soundings. Those morphological regions generally are associated with surficial sediment type classes previously identified from sediment samples. We demonstrate that the morphologies are distinguishable using parameters from models of spatial variation for gridded depth soundings and backscatter values. Ground-truth seafloor-video transects data suggest that apparent facies and morphological regions are associated with different surficial sediment classes and rates of facies transitions. We show that the spatial variability of depth and backscatter is associated with the substrate transition rate, the number of microhabitats (microfacies), and distribution of certain epifauna identified using video. We show that, in some cases, a single region defined based upon spatial morphological attributes from depth data and apparent sedimentological attributes from backscatter data represented several benthic habitats. The results suggest that although we can use spatial variability of depth or backscatter to segment the seafloor into apparent facies or habitat class regions, some of the regions will have unpredicted associated microhabitats and organisms. The results have implications for habitat-specific assessment of organisms." @default.
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- W1977160293 date "2004-10-01" @default.
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- W1977160293 title "Relationships between seafloor substrates, benthic epifauna, and spatial properties of multibeam echosounder bathymetry and backscatter data" @default.
- W1977160293 doi "https://doi.org/10.1121/1.4784929" @default.
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