Aquatic Diversity

Flowing freshwater systems are called:

• Lentic
• Lotic

Standing freshwater systems are called:

• Lentic
• Lotic

Lentic bodies of water include:

• Lakes, ponds, and wetlands
• Streams and rivers

What are economic services provided by freshwater systems?

• food, drinking water, hydroelectricity, sport
• climate moderation, nutrient cycling, waste treatment
• flood control, ground water recharge
• habitats, genetic resources and biodiversity/scientific info

Which is NOT a major ecological service that fresh-water systems provide.

• nutrient cycling
• waste treatment
• flood control
• hydroelectricity

Lakes are formed when:

• irrigation water is drained to a pool 
• the amount precipitation exceeds the amount of evaporation
• precipitation, runoff, streams and rivers fill depressions in the earth's surface
• groundwater overflows through the sediment and remains

Lakes have distinct zones determined by depth and distance from the shore. How many zones are there?

• 3
• 4
• 5
• 6

This zone is located near the shore where rooted plants grow; sunlight reaches all the way to the bottom; has high biodiversity; most productive area for food and oxygen production

• Littoral zone
• Limnetic zone
• Profundal zone
• Benthic zone

This zone is located in the open, sunlight area away from shore; extends to the depth that sunlight reaches; main photosynthetic zone

• Littoral zone
• Limnetic zone
• Benthic zone
• Profundal zone

This zone is located in the open water at a depth that is too deep for photosynthesis

• Limnetic zone
• Benthic zone
• Littoral zone
• Profundal zone