Food Chains and Food Webs

Food Webs and Ecological Pyramids

Ecological Niche ,[object Object],[object Object],[object Object]

[object Object],[object Object],Ecological Niche

Ecological Niche animal that feeds on the remains of another organism scavenger animal that eats both plants and animals omnivore animal that eats other animals carnivore animal that eats plants or other producers herbivore Definition Feeding Role

[object Object],[object Object],Food Chains

[object Object],Trophic Levels Tertiary consumers (carnivores) Secondary consumers (carnivores or omnivores) Primary consumers (herbivores) Primary producers 1st Trophic Level 2nd Trophic Level 3rd Trophic Level 4th Trophic Level

[object Object],[object Object],Food Webs

[object Object],Food Webs For this reason, complex food webs are thought to be more stable than simple food webs.

[object Object],Ecological Pyramids

[object Object],Ecological Pyramids energy pyramid pyramid of numbers pyramid of biomass

[object Object],Energy Pyramids An energy pyramid illustrates energy loss and transfer between trophic levels.

[object Object],Energy Pyramids 1000 kJ 100 kJ 10 kJ

[object Object],Energy Pyramids This often results in their populations being much smaller than species lower in the food chain (i.e. an ecosystem will have fewer predators than herbivores).

[object Object],Pyramid of Biomass

[object Object],Pyramid of Numbers

[object Object],Food Web Gizmo

Food Chains and Food Webs

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Food Chains and Food Webs