Aquatic Ecosystems Freshwater

What are areas where freshwater meets saltwater called?

• wetlands
• estuaries
• coastal byways
• intertidal zones

Aquatic ecosystem that has a thin layer of water covering soil that is wet most of the time is called ____.

• wetland
• estuary
• lake
• puddle

Wetlands and estuaries purify water and filter out _____.

• dead organisms
• waste products
• salt
• pollution

Tags

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What factors affect aquatic ecosystems? 

• Light, salinity, temperature
• Sun, moon and stars
• Nothing
• Coral reefs, whales

Tags

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Which factor(s) affect aquatic ecosystems?

• depth
• flow
• nutrients
• all affect aquatic ecosystems

Tags

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Why does photosynthesis not occur in the deep ocean? 

• Lack of nutrients
• Low oxygen levels
• Excess sunlight
• Sunlight does not penetrate

Tags

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An area where land is periodically underwater.

• Wetland
• Forest
• Desert
• Woodland

Tags

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Wetlands are important to fisheries in the united states because many of the fish caught each year use the wetlands for _______ and ________

• Dying and decaying
• Feeding and spawning
• Living and working
• Escaping and evading

The largest freshwater marsh in the United States.

• Louisiana swamp
• Mississippi river
• Texas coastline
• Florida everglades

Deep ocean technology has discovered organisms in hydrothermal vents that do not rely on sunlight to survive. What do these organisms use as their energy source?

• chemosynthesis
• electrical charge
• hydropower
• thermal heat