1. Energy Flow in the Ecosystem
E.Q: What is the main difference between food chains and food webs? How much energy is transferred to the next trophic level?

2. Energy Flow in the Ecosystem
Energy flows through an ecosystem in one direction. From the sun or chemical compounds to autotrophs (producers) and then to various heterotrophs (consumers)

3. Food Chains Marine Food Chain
Food Chains – Show how matter and energy move through the ecosystem in a series of steps showing which organisms transfers energy by eating and being eaten.
Each organism in a food chain represents a feeding step, or trophic level, in the transfer of matter and energy.
Marine Food Chain
Phytoplankton
Zooplankton
Fish
Squid
Shark

4. Food Webs
Food Webs – models that show all possible feeding relationships at each trophic level in a community; links all food chains in an ecosystem together.

5. Ecologic Pyramid
Ecologic Pyramid – (aka Trophic Level Pyramid) diagram that shows amounts of energy or matter at each trophic level
Three different types:

6. Ecological Pyramid Only 10% is passed from 1 trophic level to the next
Snake
10 kcal
Mice
100 kcal
Insects
1000 kcal
Producers
10, 000 kcal
80 g
Human
800 g
Chicken
8000 g
Grain
Fox
(10)
Birds
(25)
Grasshoppers
(250)
Grasses
(3000)
ENERGY PYRAMID
BIOMASS PYRAMID
PYRAMID OF NUMBERS

7. Chapter 3 Vocabulary

8. Chapter 3 Vocabulary
1. In your science notebook prepare 2 pages for vocabulary
3 Columns
Picture that represents the word (must use at least 4 colors)
Word (the vocabulary word will go in column 2
Definition write the definition for each word in 3rd column. You can find the definition in notes and Bio Box

9. Picture (at least 4 colors)
Chapter 3 Vocabulary
Picture (at least 4 colors)
Word
Definitions
Ecology
The study of the interactions among organisms and their environment
Species
Community
Biome
Biosphere

10. Chapter 3 Vocabulary Ecology Food Chain Biosphere Food Web Species
Trophic Level Pyramid (ecological pyramid)
Population
Biomass
Community
Limiting Nutrient
Ecosystem
Biogeochemical Cycles
Biome

11. Chapter 3 Vocabulary Extra Credit
Instead of doing to vocabulary in three columns you can do the following assignment
On the front side draw a picture that represents the word (must use at least 4 colors)
Back side:
Word
Definition
Use the word in a sentence

12. Chapter 3 Vocabulary Front Side Back Side Ecology
Definition: The study of the interactions among organisms and their environment
Sentence :