ES: [7.1] Freshwater Ecosystems

Microscopic organisms that float near the surface of the water are called

• plankton 
• littoral 
• benthic

The plankton that are microscopic and plant like are called 

• zooplankton 
• phytoplankton 
• minnows

The plankton that is animal-like is called

• bacteria 
• phytoplankton 
• zooplankton 

______ are all organisms that swim freely, independent of currents.

• Benthic 
• Zooplankton 
• Nekton 

Organisms that live on the bottom of aquatic ecosystems are known as 

• littoral 
• benthic 
• nekton

The zone near the shoreline in a lake is known as the _________________zone.

• benthic 
• photosynthesis  
• littoral 

An increase in the amount of nutrients in a lake is known as 

• plankton 
• oligotrophic 
• eutrophication 

____________________are wetlands that contain non-woody plants.

• marshes  
• swamps 
• estuaries

_____________ are wetlands that are dominated by woody plants, such as trees.

• marshes 
• swamps  
• estuaries

What is man doing that is harming wetlands?

• By building homes and businesses on them. 
• By draining them for farmland.
• By draining them for farmland & building homes and businesses on them.
• Man is not harming the wetlands.