Aquatic Ecosystems- Freshwater

What are the 3 types of wetlands?

• swamp, ocean, river
• pond, river, marsh
• marsh, marsh, marsh
• swamp, marsh, bog

In a lotic system water is flowing.

• True
• False

In a lentic system water is still.

• True
• False

Microscopic, free-floating, autotrophic organisms that function as producers in aquatic ecosystems are called...

• plankton
• zooplankton
• phytoplankton
• bacteria

A habitat in which the fresh water of a river meets the salt water of the ocean.

• estuary
• swamp
• marsh
• fen

New lakes with relatively low levels of nutrients, deep & cold, with little organic matter (little phytoplankton)

• eutrophic
• mesotrophic
• limtrophic
• oligotrophic

A shallow zone in a freshwater habitat where light reaches the bottom. It's the most biologically diverse location in a lake.

• limnetic zone
• profundal zone
• littoral zone
• benthic zone

What is the name of the point where a river starts?

•  Source Zone
•  Point A
•  Heart
• River Opening 

What is the name of the point where a river ends (where river meets ocean)?

• Tributary
• Water Shed
• Confluence
• Mouth of the River

Sharks, dolphins, turtles, and other strong swimmers are called...

• plankton
• nekton
• benthos
• rethos