Chapter 7 Review

Organisms that swim freely in aquatic ecosystems, independent of currents; examples are fish, turtles, and whales.

• Plankton
• Nekton
• Benthos
• Decomposers

Microscopic drifting organisms that perform photosynthesis; they form the base of most aquatic food chains.

• Plants
• Zooplankton
• Crustaceans
• Phytoplankton

Aquatic ecosystems contains several types of organisms that are grouped by

• Sunlight & Temperature
• Salinity & Nutrients
• Oxygen & Nutrients
• Location & Adaptation

What is the source of most ocean pollution?

• Activities on land
• Climate change
• Aquatic animals
• None of the above

Which is not an environmental function of freshwater wetlands?

• Filter pollutants
• Reducing carbon dioxide released into the air
• Habitat for diversity of species
• Control flooding

Which is not a saltwater ecosystem?

• Mangrove swamps
• Salt marshes
• Florida Everglades
• Coral reefs

Which is not a major threat to the ocean?

• Plastic pollution
• Algal growth
• Climate change
• Overfishing

Wetlands that are dominated by woody plants

• Salt Marsh
• Estuary
• Brackish Marsh
• Swamp

An increase in the amount of nutrients in an aquatic ecosystem that results in a large amount of algal growth.

• Estuary
• Zooplankton
• Eutrophication
• Phytoplankton

Mangrove trees grow 

• Along riverbanks
• In freshwater wetlands
• In tropical and subtropical areas
• In the benthic zone of lakes