ENV Ch. 7 Aquatic Ecosystems

factor that determines where aquatic organisms live

Free-swimming organisms.

A threat against marine organisms.

The base of marine food web.

Estuaries are productive ecosystems because they constantly receive nutrients from

Marine ecosystem...

bottom-dwelling organisms

Why doesn't photosynthesis occur in deep ocean water?

An ecosystem found in shallow, tropical seas.

A wetland dominated by woody plants.

Which of the following aquatic ecosystems are both littoral and benthic zones most likely found

The majority of marine organisms are found in

Limestone ridges built by tiny animals.

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

The amount of dissolved salts in water.

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

Located near the bottom of a pond or lake.

precipitation that can carry pollutants into aquatic ecosystems

Aquatic zone found near the shore.

An increase in nutrients in an aquatic ecosystem.

In which aquatic zone would you likely find cattails and reeds?

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

All of the following are examples of saltwater ecosystems except

Which ecosystem has the highest level of salinity?

A potential threat to an estuary.

A wetland dominated by non-woody plants.

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

Most of the nutrients in an arctic ecosystem come from

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

One way wetlands control flooding is by

A freshwater ecosystem.

An area where fresh water mixes with salt water.

What are the two main types of freshwater wetlands?

Swamps are commonly found on 

A marine ecosystem considered not productive.

What is the source of most ocean pollution?

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

Threat against a river ecosystem.

An organism that anchors itself to grasses or rocks.