Imagine an ecosystem such as a pond. It is a freshwater with perch, bass, ducks, crayfish, frogs, and sometimes a visiting water snake or two. It has algae and water plants. Use this information to answer the following two questions

In the ecosystem described in the image above, all of the following are biotic factors that would affect it except:
A. beavers
B. fir trees
C. hawks
D. temperature
In the ecosystem described in the image above, all of the following are abiotic factors that would affect it except:
A. type of soil
B. temperature
C. rainfall
D. water snakes

In the ecosystem described in the image above, the biotic factors that would affect it include beavers, hawks, bass, perch, ducks, crayfish, frogs, algae, water plants, and water snakes. The abiotic factors that would affect it include temperature, type of soil, and rainfall.

Therefore, in the ecosystem described in the image above, the answer to the first question is B. fir trees, which are not part of the ecosystem. The answer to the second question is D. water snakes, which are biotic factors.