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Notes 11.2 Aquatic Ecosystems

Notes 11.2 Aquatic Ecosystems. I. Freshwater Ecosystems. A. Factors that affect ecosystems 1. sunlight a. key factor - photosynthesis 2. temperature 3. O 2 4. salt content. I. Freshwater Ecosystems. B. Streams and Rivers 1. animals adapted to strong current

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Notes 11.2 Aquatic Ecosystems

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  1. Notes 11.2 Aquatic Ecosystems

  2. I. Freshwater Ecosystems A. Factors that affect ecosystems 1. sunlight a. key factor - photosynthesis 2. temperature 3. O2 4. salt content

  3. I. Freshwater Ecosystems B. Streams and Rivers 1. animals adapted to strong current a. hooks/suckers b. streamline bodies C. Ponds and Lakes 1. standing/still water a. ponds are more shallow b. plants can grow c. dragonflies, turtles, snails, frogs

  4. I. Freshwater Ecosystems Freshwater Ecosystem

  5. II. Marine Ecosystems A. Four zones: estuaries, intertidal zones, neritic zones, open ocean 1. Estuary a. fresh water of river meets salt water

  6. II. Marine Ecosystems 2. Intertidal zone a. area between high tide line and low tide line 1. must be able to survive pounding waves 2. barnacles, sea stars

  7. II. Marine Ecosystems Intertidal zone

  8. II. Marine Ecosystems 3. Neretic zone a. area below low tide line 1. shallow region extends over continental shelf 2. sunlight can pass through– photosynthesis 3. rich in living things.

  9. II. Marine Ecosystems b. kelp forests 1. grow in cold neretic zones 2. major producer-kelp c. Coral reefs 1. grow in tropical regions 2. made of colonies of tiny coral animals a. algae live in bodies of coral animals 1. provide food for coral animals

  10. II. Marine Ecosystems c. open ocean 1. light only reaches a few hundred meters 2. floating algae – photosynthesis a. provides food – tuna, swordfish, whales 3. deep zone a. mostly dark

  11. II. Marine Ecosystems Marine Biome

  12. III. Ocean Food Web A. Organisms connect by food chains and food webs 1. Producers are plankton a. type of algae – floats on water b. food source

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