Exam 31: Ecosystems

Lake ecosystems have many trophic levels.

What is the main cause of carbon dioxide buildup in the atmosphere?

Tropical rain forests, swamps, and marshes contribute similarly to mean net primary productivity.

Which of the following is the pathway that carbon takes in its global cycle?

Nearly all ecosystems receive a constant input of energy from which outside source?

Match each description with the appropriate scientific term. -diagram showing the inefficient transfer of energy from one trophic level to the next

Which ecosystem would have the lowest percentage of total net primary productivity?

Match each description with the appropriate scientific term. -relationship between a predator and prey that affects populations in two or more trophic levels