Research Ecologists Often Specialize in One Level of Ecology

Multiple Choice

Research ecologists often specialize in one level of ecology.Which question would most likely be studied by a Yellowstone National Park ecologist specializing in biogeochemical cycles in ecosystems?

A) What is the sex ratio of the elk living in the park?
B) How does nitrogen move among the organisms, soil, water, air, and rocks of the park?
C) How does the reintroduction of wolves influence other large mammal populations in the park?
D) What types of species interactions occur among the major species in the park's food webs?
E) What geological history led to the development of the park's environment?