Predict how a decrease in the number of predators due to hunting, for example might affect the cycling of carbon in the Serengeti. Use your diagram for Question support your answer.

Summarize three major roles of microbes in nitrogen cycling in the Serengeti.

Nitrogen gas (N2) makes up 78% of Earth’s atmosphere. Why are so many ecosystems limited by nitrogen even though it is so abundant?

Describe one way in which the cycling of nitrogen (and phosphorus) might be affected by human agriculture.

atmosphere Photosynthes plants wildebeest "feeding lions death/defecationlurination decamporti on dead organisms and waste