ENV Ch. 7 Aquatic Ecosystems

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

The base of marine food web.

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

An increase in nutrients in an aquatic ecosystem.

Threat against a river ecosystem.

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

precipitation that can carry pollutants into aquatic ecosystems

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

Free-swimming organisms.

A threat against marine organisms.

An ecosystem found in shallow, tropical seas.

A potential threat to an estuary.

Most of the nutrients in an arctic ecosystem come from

One way wetlands control flooding is by

A wetland dominated by non-woody plants.

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

Marine ecosystem...

The majority of marine organisms are found in

An area where fresh water mixes with salt water.

Located near the bottom of a pond or lake.

The amount of dissolved salts in water.

An organism that anchors itself to grasses or rocks.

Which ecosystem has the highest level of salinity?

Estuaries are productive ecosystems because they constantly receive nutrients from

Aquatic zone found near the shore.

All of the following are examples of saltwater ecosystems except

factor that determines where aquatic organisms live

Swamps are commonly found on 

Limestone ridges built by tiny animals.

A wetland dominated by woody plants.

Why doesn't photosynthesis occur in deep ocean water?

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

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

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

What are the two main types of freshwater wetlands?

A marine ecosystem considered not productive.

bottom-dwelling organisms

A freshwater ecosystem.

What is the source of most ocean pollution?