Exam 24: Aquatic Ecosystems

Smaller than diatoms, the ________, which include tiny cyanobacteria, haptophytes, and coccolithophores, make up the largest biomass in temperate and tropical water.

Lakes and ponds are often formed through nongeological activities.

________ refers to the plants and animals living on the bottom of the ocean.

In lakes and ponds, oxygen concentrations are lowest in the

The water above the continental shelf belongs to the ________ province of the pelagic zone.

Describe the differences between phytoplankton, zooplankton, and nekton. How do they interact with each other?

In lakes and ponds, the open water zone extending to the depth of light penetration is referred to as the ________ zone.

A lake that forms through tectonic movement is known as a ________ lake.

The oxygen-minimum layer of an ocean occurs in the

Organisms living in deep-sea hydrothermal vents do not need light to obtain their energy.

Describe the types of organisms and biological activities that occur within the littoral, limnetic, and benthic zones of a lake.

Most estuarine organisms are benthic.

In streams and rivers, the group of invertebrates that feeds on coarse particulate organic matter (mostly leaves that fall into the stream)is referred to as the ________.

Unlike phytoplankton, which are at the mercy of currents, zooplankton can move at will within a current.

Which of the following lakes is likely to be the most oligotrophic?

The tiny, photosynthetic, primary producers of open water such as desmids, diatoms, and filamentous algae, are referred to as ________.

Non-flowing water bodies, such as lakes, are referred to as lotic ecosystems.

Eutrophic lakes typically are very clear, with little algal growth.

Barrier reefs are separated from land by shallow lagoons.

The zone in the ocean from the surface to approximately 200 metres deep is called the ________, or photic, zone.