What do most deep water consumers depend on for survival?
a. The productivity of the water column above
b. Chemosynthetic productivity
c. The deep scattering layer of nutrients
d. Rift communities
ANS: A
There is no photosynthesis occurring in the deep water because of the permanent darkness. For the
most part, consumers rely on the biological activity above them for nutrients. There are some areas
where chemosynthesis is also occurring. Information can be found in the section Examples of Marine
Communities
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