Question

Which of the following examples of an ecological study involves the ecosystem level of organization?

A. The effects of human activities on biogeochemical cycling
B. The effects of a disease on population size
C. The effects of an invasive plant species on bird nesting sites
D. The effects of competition on survival

Answer 1

the closest answer to being correct is A, because ecosystem involves biotic and abiotic. and since humans are biotic and the cycle is abiotic. it is on the ecosystem level! :D