Select the trophic level of each organism in the table. When you are done, close this window and draw lines between the organisms on the food web.

Organism Food Source Trophic Level
Bacillus
(Bacteria)
detritus
Blackberry bush sun
Bumblebee nectar
California gopher snake small rodents
California tiger salamander insects
California tree frog insects
Desert tortoise leaves, flowers, fruit
Duckweed (Aquatic Plant) sun
Fairy shrimp algae, bacteria, protozoa, detritus
Butterfly nectar
Fresno kangaroo rat seeds, grasses, some insects
Golden trout insect larvae, aquatic nematodes
Grasses sun
Grasshopper grasses
Mosquito blood of mammals
Mountain lion large and small vertabrates
Mushroom detritus
Opalinda
(a protozoan)
lives in the intestines of fish, amphibians, and reptiles
Saprolegnia
(pond mold)
dead fish
Screech owl rodents, fish, amphibians, reptiles
Sierra Nevada bighorn sheep grasses, woody plants
Sun none
Tule elk acorns, twigs, shrubs, berries, grasses, herbs
Valley oak tree sun
Water strider insect larvae, especially mosquito larvae

MOUNTAIN LION

MUSHROOM

MOSQUITO

BACILLUS
(Bacteria)

BUMBLEBEE

TULE ELK

SUN

BLACKBERRY BUSH

SCREECH OWL

VALLEY OAK TREE

GOLDEN TROUT

CA GOPHER SNAKE

GRASSES

GRASSHOPPER

SIERRA NEVADA
BIGHORN SHEEP

CA TIGER SALAMANDER

CA TREE FROG

BUTTERFLY

WATER STRIDER

DESERT TORTOISE

DUCKWEED
(Aquatic Plant)

FAIRY SHRIMP

SAPROLEGNIA

OPALINDA

FRESNO KANGAROO RAT