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Dredge small sediment samples9/16/2023 ![]() To investigate these relationships, acoustic geophysical methods (echobatimetry, sonography, and high-resolution seismic) and direct observation methods (underwater video and geological sampling) were used in two distinct areas on the Rio de Janeiro continental shelf, adjacent to Guanabara Bay: Area I (degraded with dredging disposal) and Area II (control, without disposal). ![]() Geohabitats studies contribute to this previous characterization, showing how geological and geomorphological features are associated with the benthic ecosystems of a given location. Disposal of dredged sediments from harbor areas is often carried out without prior characterization and diagnosis of the benthic ecosystem and its relationships with the physical environment.
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