Unit 4 Review - Energy Flow and Populations

producers

primary consumers

secondary consumers

decomposers

Energy is continuously recycled by the organisms in an ecosystem.

Energy flows in one direction in an ecosystem, from producers to consumers.

More of the available energy in an ecosystem is given to large animals than to small animals.

Organisms at the end of the food chain receive more energy than those at the beginning.

bird

fox

caterpillar

tree

It converts oxygen to glucose.

It produces carbon dioxide from oxygen and water.

It produces glucose from carbon dioxide and water.

It converts water to energy.

The number of bass will increase.

The number of crayfish will decrease.

The crayfish will get their energy directly from the sun.

The number of bass and ospreys (bird) will increase.

waves

sunlight

bacteria

rotifers, water fleas and tadpoles

primary producers.

primary consumers.

secondary consumers.

tertiary consumers.

kelp to have less food.

crabs to have more food.

sea ducks to have less food.

arctic foxes to have more food.

Another organism in the marine ecosystem is a producer.

Organism W is a secondary consumer in the marine ecosystem.

The role of Organism T in the marine ecosystem changes during its life.

This marine ecosystem does not have any producers.

clams

sardines

sharks

kelp (seaweed)