Energy Flow in Ecosystems

producers

carnivores

herbivores

omnivores

snakes

hawks

plants

grasshoppers

snakes and hawks

spiders and snakes

shrews and snakes

grasshoppers and spiders

food chain

population

food web

line graph

Level A contains the most producers

Organisms in level B get food directly from level A

Level C contains the largest group of consumers

Level D contains the most heterotrophs

A

B

C

D

sunfish -> Algae -> great blue heron -> crustaceans

great blue heron -> crustaceans -> sunfish -> algae

algae -> crustaceans -> sunfish -> great blue heron

crustaceans -> great blue heron -> algae -> sunfish

A

B

C

D

deer

wolves

mice

grasses

fruit -> toad -> snake -> mouse

snake -> grasshopper -> deer -> wolf

mouse -> raccoon -> snake -> toad

grass -> grasshopper -> raccoon -> wolf