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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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I. Freshwater Ecosystems A. Factors that affect ecosystems 1. sunlight a. key factor - photosynthesis 2. temperature 3. O2 4. salt content
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
I. Freshwater Ecosystems Freshwater Ecosystem
II. Marine Ecosystems A. Four zones: estuaries, intertidal zones, neritic zones, open ocean 1. Estuary a. fresh water of river meets salt water
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
II. Marine Ecosystems Intertidal zone
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.
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
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
II. Marine Ecosystems Marine Biome
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