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Energy Flow Food Chains and Food Webs
Food Chains
A food chain represents a single pathway through which energy and matter flow through an ecosystem.
Most organisms consume—and are consumed by—more than one species.
Producer
• Dunaliella salina
• Makes own food
• Usually a plant
• Photo-synthesis
Primary Consumer
•Brine shrimp
•Usually an herbivore
•Primary must eat plants
•Consumer can eat more than plants
Secondary Consumer
• Wilson’s phalarope
• Eats primary consumer
• Can be omnivore or carnivore
Tertiary Consumer
• Marsh Hawk
• Eats secondary consumer
• Typically a carnivore
A cloud of Wilson's phalaropes fly above Farmington Bay, Utah Life in the Great Salt Lake
Producer
• Rice Grass
• Makes own food
• Usually a plant
• Photo-synthesis
Primary Consumer
•Utah Prairie Dog
•Usually an herbivore
•Primary must eat plants
•Consumer can eat more than plants
Secondary Consumer
• Black-footed ferret
• Eats primary consumer
• Can be omnivore or carnivore
Producer
• Black brush
• Makes own food
• Usually a plant
• Photo-synthesis
Primary Consumer
•Bighorn Sheep
•Usually an herbivore
•Primary consumer must eat plants
•Consumer can eat more than plants
Secondary Consumer
• Cougars
• Eats primary consumer
• Can be omnivore or carnivore
Food Chain: Models how matter and energy flow through an ecosystem
Radiant/Light Energy
• Sun
Chemical Energy • Glucose
Molecules
• Photosynthesis
Mechanical Energy
• Organism eats and uses it to live
• Cellular Respiration
Heat Energy
• Back into space
Food Chain: Models how matter and energy flow through an ecosystem
Food Webs
A food web represents multiple pathways through which energy and matter flow through an ecosystem.
It includes many intersecting food chains.
Most organisms eat, and are eaten, by more than one species.
Food Webs: Savanna Biome A model that shows several connected food chains.