Physics
Scientific paper
Sep 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984e%26psl..70...95g&link_type=abstract
Earth and Planetary Science Letters, Volume 70, Issue 1, p. 95-109.
Physics
6
Scientific paper
Long-term measurements on and near the seafloor were made at five locations in the Pacific as part of the Manganese Nodule Project (MANOP). Bottom Ocean Monitor (BOM) tripods deployed at each site contained a time-lapse camera, nephelometer, and current meter. From nearly three years of photographs of the seafloor, there was no evidence that benthic organisms turned over, rotated, or moved nodules. There were indications, however, that benthic organims cleaned sediment from the tops of nodules and in some cases deposited sediment underneath nodules. Currents never exceeded the expected threshold for sediment resuspension of nodule movement. Particle concentrations in the water remained uniformly low throughout the deployments. Degredation of fecal pellets and organic matter proceeded more rapidly than expected. All changes of the seafloor morphology were attributable to the activity of organisms as opposed to currents. The occurrence in one photo sequence of dark, fluffy globs may be related to phytoplankton blooms in the region of equatorial upwelling.
Gardner Wilford D.
Sullivan Lawrence G.
Thorndike Edward M.
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