3-2 Energy Flow

1
3-2 Energy Flow

• Two energy sources
• Sunlight (Photosynthesis)
• Inorganic chemicals (Chemosynthesis)

2
Autotrophs (Producers)- capture energy make food

• Heterotrophs (Consumers)- cannot make their own
  food must eat

3
Kinds of Heterotrophs

• Herbivore
• Consumer that eats plants or other primary
  producers
• Ex rabbit, cow, deer, manatee

4
Kinds of Consumers

• Primary consumer- eats producers
• Secondary consumers- eat primary consumers

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• Omnivores
• animal that eats both plants and animals
• Ex human, bear

6

• Decomposer
• Uses nutrients by breaking down dead plants and
  animals
• Ex fungus, bacteria

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Parts of an Ecosystem

• Abiotic Factors- nonliving (Ex. Light,
  temperature, water, minerals, soil, gases, pH)
• Biotic Factors- living factors living organisms
  in an ecosystem

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Feeding Relationships

• Food chain series of steps in which organisms
  transfer energy by eating and being eaten

Whos missing?
9

• Food web interconnected group of food chains

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• Trophic levels groups of organisms with same
  energy source and step in food chain

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Ecological Pyramids

• Diagram
• Shows an amount within each trophic level in a
  food chain or food web

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• Energy Pyramid
• Amount of energy stored in each level
• 10 transferred to next trophic level
• 90 energy lost as heat

13

• Biomass Pyramid
• Amount of living tissue

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• Pyramid of Numbers
• Number of individual organisms at each trophic
  level