Levels of Organization

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Levels of Organization
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Levels of Organization

• Individual single organism
• Population groups of individuals of same
  species
• Community All living organisms in a defined
  area
• Ecosystem All biotic and abiotic factors
• Biome Area defined by a particular climate

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Energy Flow

• Producers (autotrophs)
• Only plants, some algae, and certain bacteria can
  capture energy from sunlight or chemicals to
  produce food

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Energy Flow

• Consumers (heterotrophs)
• Can only acquire energy from other organisms
• Herbivores (eat only plants)
• Carnivores (eat other animals)
• Omnivores (eats plants and animals)
• Detritivores (eats plant and animal remains)
• Decomposers (break down organic matter)

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Feeding Relationships

• Energy flow through an ecosystem
• Food chain

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Feeding Relationships

• Food Web
• Shows all possible feeding relationships in an
  ecosystem

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Trophic Levels

• Each step in a food chain or web

Trophic level 3
Trophic level 2
Trophic level 1
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Ecological Pyramids

• Energy Pyramid
• shows energy as it moves from one feeding level
  in a food chain to another.  

Only 10 percent of energy available at each level
is transferred to next
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Pyramid of Numbers

• Shows relative number of individual organisms at
  each trophic level