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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
I. Freshwater Ecosystems

A. Factors that affect ecosystems

1. sunlight

a. key factor - photosynthesis

2. temperature

3. O2

4. salt content

i freshwater ecosystems1
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 ecosystems2
I. Freshwater Ecosystems

Freshwater Ecosystem

ii marine ecosystems
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 ecosystems1
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 ecosystems2
II. Marine Ecosystems

Intertidal zone

ii marine ecosystems3
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 ecosystems4
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 ecosystems5
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

iii ocean food web
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