Which are consumers within a spruce-fir forest ecosystem? a. mushrooms b. red squirrels c. limber pine trees d. bristlecone pine trees which is a nonliving factor that defines a spruce-fir forest ecosystem? a. type of soil b. type of trees c. type of bacteria d. type of mammals which are decomposers within a spruce-fir forest ecosystem? a. mushrooms b. pine martins c. canada lynxes d. limber pine trees

A.Consumers: Red squirrels

            B. Non-living system: Type of soil

            C. Decomposers: Mushrooms

Explanation:

Consumers are the organisms that feed on producers for their energy needs. The producers make food by the help of the process known as photosynthesis.

here, the red squirrels are known as consumers. They are primary consumers that feed directly on the plants.

The ecosystem consists of both biotic factors and abiotic factors. The biotic factors are known to be the living components of the ecosystem and abiotic components are the non living part of the ecosystem. Example: Type of soil is a non living part of ecosystem.

The mushrooms are known to be decomposers because they feed on the dead and decaying organic matter of the plants and animals and helps in cleaning the ecosystem.

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.