Oceanography Terms 3 Set 16

The relative proportion of ________ in the Caribbean Sea _________ markedly with distance offshore

diatoms, decreases

The major herbivorous zooplankton in the open ocean are: (they are grazed by copepods)

Foraminifera, radiolaria,

Many open ocean zooplankton display _______ distribution patterns

latitudinal

Six Many zooplankton rely on organic _______ falling from above for food.

Detritus

Some organisms like __________ practice ________ ________ ___________ - swimming up to the photic zone at night to feed while visual predators can’t spot them, and then migrate to the dysphotic zone during the day

euphausiids, diurnal vertical migration

The region below the compensation level where light penetration is such that oxygen production by photosynthesis is exceeded by oxygen consumption by respiration is the:

Dysphotic zone

The zone that is permanently dark and cold, which is extremely stable but harsh as an environment, is the

(most organisms are red or black as to not be seen, many midwater fishes are unique)

aphotic zone

From top to bottom, the zones are:

To compensate for major lack of food, most deep ocean fishes have extremely powerful and large ____ while having very light ______. Many fish also have large, expandable _______.

jaws, bones, stomachs

Characteristics of benthic organisms include:

year-round reproduction, small broods, slow growth, longer life