Sediment traps and benthic respirometers have been used to measure the supply of particulate materials to, and the use of organic material by the North Atlantic deep-sea benthos. The area of the sea floor less than 2 kilometers deep is relatively small but accounts for 85% of the total oceanic benthic oxygen consumption, which reflects the primary productivity of the surface waters....
Hinga, Kenneth R., J. M. Sieburth, and G. R. Heath. 1979. "The supply and use of organic material at the deep-sea floor." Journal of Marine Research 37, (3). https://elischolar.library.yale.edu/journal_of_marine_research/1484