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Test Bank for Marine Biology: Function, Biodiversity, Ecology 2E - page 22 / 44





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d. Are all carnivorous

Chapter 9

The Spring diatom increase

a. Reaches its peak of biomass at the time day length is longest

b. Reaches its peak of biomass after the time of day length is longest

c. Attains a maximum  of biomass when nutrients are still very concentrated in the surface waters

d. Does not end because of reduced day length

At the compensation depth

a. Total phytoplankton oxygen production in the water column equals total respiration

b. Phytoplankton oxygen production per cell equals cell respiration

c. Phytoplankton cells are stationary in position

d. There is no light present

A phytoplankton bloom will begin to increase

a. If the mixing depth is greater than the critical depth

b. If the mixing depth is equal to the critical depth

c. If the mixing depth is less than the critical depth

d. If the mixing depth is less than the compensation depth

In the temperate zone, towards the end of the spring

a. The water column becomes more stable vertically

b. The water column becomes less stable vertically

c. Mixing from below brings bottom nutrients towards the surface

d. The phytoplankton begin a secondary early summer increase

Benthic-planktonic coupling

a. Occurs only in the deep sea

b. Is restricted to waters where a strong thermocline is permanent

c. Is correlated with the development of an isothermal water column

d. Can only occur when wind action is nil

In turbid nearshore ocean waters

a. Light penetration is at wave lengths that are shorter than for the open sea

b. Light penetration is deeper than in the open sea

c. Light penetration is greatest at the far red end of the spectrum

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