FOOD CHAINS, WEBS & PYRAMIDS. sun eclipse with palm the ultimate energy source.

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Presentation transcript:

FOOD CHAINS, WEBS & PYRAMIDS

sun eclipse with palm the ultimate energy source

If you are what you eat, what are you? producer detritivore omnivore carnivore herbivore consumer decomposer autotroph heterotroph

PRODUCERS l What are producers? sunlightproducer l Ex. Plants, algae and some bacteria

CONSUMERS l What are consumers? sunlightproducerconsumer 1consumer 2 l Examples: deer, rabbits, cows, mice, lions, humans, hawks, snakes

Where do all the dead things go?

DECOMPOSERS l What are decomposers? l Examples: bacteria, fungi, insects sunlightproducerconsumer 1consumer 2 consumer 3 decomposer

HERBIVORES l What are herbivores? l Ex. Cows, caterpillars, rabbits sunlightproducerconsumer 1consumer 2

CARNIVORES l What are carnivores? l Ex. tigers, wolves, snakes, hawks sunlightproducerconsumer 1consumer 2

OMNIVORES l What are omnivores? l Ex. bears and humans

Food Chains & Food Webs l Organisms in ecosystems transfer energy from organism to organism in feeding relationships called trophic levels.

Food Chain Example: Algae Krill Cod Leopard Killer Seal Whale producerprimary consumer quaternary consumer tertiary consumer secondary consumer herbivore carnivore

Food Chains & Food Webs l What would happen in this food chain if all the cod were to die? l What would happen to krill if all algae were to die? l Which is more stable, a food chain or a food web? Why?

Ecological Pyramids l Instead of representing trophic levels in a food web, an ecological pyramid can be used.

Algae Krill Cod Leopard Seal Killer Whale Ecological Pyramids

1 st Trophic Level 2 nd Trophic Level 3 rd TL 4 th TL 5 th TL Algae Krill Cod Leopard Seal Killer Whale

Ecological Pyramids Producer Primary Consumer Secondary Consumer Tertiary Consumer Quaternary Consumer Algae Krill Cod Leopard Seal Killer Whale

Pyramid of Energy l What happens to the energy as you go up? l How much energy is lost between levels? l Why? l How much energy is retained?

Pyramid of Biomass What does this pyramid of biomass illustrate? What is biomass?

Pyramid of Numbers What does this pyramid of numbers illustrate?

Ecological Pyramids l What happens to the biomass, numbers,and energy from trophic level to trophic level?

Ecological Pyramids l What is different about this pyramid?

Pyramids of Aquatic Ecosystems l Numbers l Biomass l Energy

Pyramids of Temperate Forests l Numbers l Biomass l Energy