Aquatic ecosystems

This type of aquatic ecosystem is a mix of fresh and salt water.

• estuary
• lake
• river

An aquatic ecosystem includes any

• fish and frogs living there
• water environment and the community of organisms living there
• water but no animals or plants

The major abiotic factors that influence aquatic ecosystems include

• water temperature and amount of light
• plants and animals
• water and plants growing there

Tags

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Some organisms that live in lakes include:

• sharks
• protists
• rocks and soil

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Wetlands have high species diversity.

• false
• true

Tags

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One of the benefits of wetlands, is that they can

• replace lakes and ponds
• filter pollutants out of water
• provides land for housing developments

Tags

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Important limiting factors in streams and rivers include

• amount of oxygen
• temperature of water
• all of the above

Tags

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Organisms in estuaries must be able to survive

• frequent dry conditions
• high winds
• changing salt levels

Tags

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Salt water is denser than fresh water. What ecosystem is most affected by this fact?

• lake
• river
• stream
• estuary

Tags

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Which is a fresh water ecosystem?

• river
• estuary
• ocean