Ch. 7 Aquatic Ecosystems Review

Located near the bottom of a pond or lake.

Aquatic zone found near the shore.

Which of the following is a factor that influences where an organism lives in an ecosystem?

Marine ecosystem...

The amount of dissolved salts in water.

Why doesn't photosynthesis occur in deep ocean water?

One way wetlands control flooding is by

Free-swimming organisms.

Swamps are commonly found on 

Which of the following is not a threat to coral reefs?

All of the following are examples of saltwater ecosystems except

Estuaries are productive ecosystems because they constantly receive nutrients from

A potential threat to an estuary.

What kind of water is found on the bottom of estuaries?

A marine ecosystem considered not productive.

factor that determines where aquatic organisms live

An increase in nutrients in an aquatic ecosystem.

A wetland dominated by non-woody plants.

Organisms that live in estuaries must adapt to changes in...

In estuaries, fresh water and salt water mix, forming a...

Which ecosystem has the highest level of salinity?

What are the two main types of freshwater wetlands?

An area where fresh water mixes with salt water.

A freshwater ecosystem.

precipitation that can carry pollutants into aquatic ecosystems

bottom-dwelling organisms

A wetland dominated by woody plants.

A threat against marine organisms.

The type of plankton that produces most of the food in an aquatic ecosystem is called

Limestone ridges built by tiny animals.

An ecosystem found in shallow, tropical seas.

What is the source of most ocean pollution?

The majority of marine organisms are found in

Threat against a river ecosystem.

The base of marine food web.