Aquatic Ecosystems

How do ecologists classify aquatic ecosystems?

• Salinity

• Depth

• Movement

• All of the above

What are wetlands?

• areas of land that are flooded at least part of the year

• the ocean

• lakes

• estuaries

What is NOT an important feature of a wetland?

• Prevents flooding

• Provides habitat for organisms

• Prevents wildfires

• Filters and purifies water

Salinity refers to

• how many plants are in the water

• how many organisms live in the water

• how much salt in is water

All are freshwater ecosystems except

• marshes

• lakes

• eustary

• rivers

An area in which fresh water from a river mixes with salt water from the ocean

• Mangrove Swamp
• Estuary
• Marshes
• Wetland

The bottom region of oceans and bodies of fresh water is 

• Benthos
• Benthic Zone
• Limnetic Zone
• Nekton

Aquatic life is abundant, diverse, and full of sunlight at which zone?

• littoral zone

• benthic zone

• limnetic zone

Two factors that determine where an organism lives in aquatic ecosystem are 

• Temperature and sunlight
• Neighbors and housing prices
• Fish and wildlife
• Darkness and tree height

What is at the base of the food chain in the ocean?

• whales

• plankton

• turtles

• seaweed