Notes 11.2 Aquatic Ecosystems
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Transcript of Notes 11.2 Aquatic Ecosystems
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Notes 11.2 Aquatic Ecosystems
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I. Freshwater EcosystemsA. Factors that affect ecosystems 1. sunlight a. key factor - photosynthesis 2. temperature 3. O2
4. salt content
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I. Freshwater EcosystemsB. 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
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I. Freshwater EcosystemsFreshwater Ecosystem
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II. Marine EcosystemsA. Four zones: estuaries, intertidal zones, neritic
zones, open ocean 1. Estuary a. fresh water of river meets salt water
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II. Marine Ecosystems2. Intertidal zone a. area between high tide line and low tide line 1. must be able to survive pounding waves 2. barnacles, sea stars
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II. Marine EcosystemsIntertidal zone
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II. Marine Ecosystems3. 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.
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II. Marine Ecosystemsb. kelp forests 1. grow in cold neretic zones 2. major producer-kelpc. 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
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II. Marine Ecosystemsc. 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
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II. Marine EcosystemsMarine Biome
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III. Ocean Food WebA. Organisms connect by food chains and food webs 1. Producers are plankton a. type of algae – floats on water b. food source