Decomposers
1. Sun 2. Producers 3. Herbivores 4. Carnivores 5. Scavengers
consumers
Omnivores
PLANTS
All the oak trees in a forest
~ An orchid living on a tree branch
~A tick feeding on an bird
mutualism
Food web
an ecosystem
contains only a biotic environment. Living Things: tree squirrel Fish bird
consumer
scavengers
Not alive-but natural: soil, rock, water, oxygen
a biome can contain one or more ecosystems.
Tropical rainforest
desert
The tundra
1. A rainbow trout 2. All the rainbow trout in a stream 3. The water, rocks, and organisms in a stream 4. All the rainbow trout, other fish, and insects in the stream
People in a community cut down trees in a forest so they could use the wood. They cut down many trees each year. After several years, a population of rabbits in a nearby field had become so large that the rabbits were causing problems for the community. What is the explanation?
Biomes Tundra Desert Deciduous Forest Tropical Rainforest Grasslands Coniferous Forest
Energy Pyramid for the Food Web Who are the producers? Seaweed and phytoplankton Seaweed & phytoplankton What are the herbivores? Limpets and zoo plankton Prawn, crabs, whelk, mussels Fish gull, lobster