. Consideration of a waiver of the moratorium and return of management of certain marine mammals to the State of Alaska : final environmental impact statement / Interagency Task Group [of] Department of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service [and] Department of the Interior, Fish and Wildlife Service. Marine mammals // ///â >//// / / /-SUNLIGHT / / / //////////. Fig, 2 The biological cycle in the arctic and subarctic marine zones, somewhat simplified. The prey-predator system illustrated in the right-hand three-quarter
. Consideration of a waiver of the moratorium and return of management of certain marine mammals to the State of Alaska : final environmental impact statement / Interagency Task Group [of] Department of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service [and] Department of the Interior, Fish and Wildlife Service. Marine mammals // ///â >//// / / /-SUNLIGHT / / / //////////. Fig, 2 The biological cycle in the arctic and subarctic marine zones, somewhat simplified. The prey-predator system illustrated in the right-hand three-quarters of the figure ends finally in che production of organic detritus, which is decomposed by the bacterial action mainly on the soa-floor in moderate depths. The resulting supply of inorganic plant nutrients (nitrates, phosphates) is returned to the surface by vertical water exchange in the autumn and winter, and is thus available for the regeneration of the phyroplankton population in the springtime conditions of increasing sunlight. Modified after Dunbar (1953). 25. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. National Marine Fisheries Service; U. S. Fish and Wildlife Service. Washington, D. C. : The Group
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