Cengage Advantage Books: Sustaining the Earth 10th Edition by Tyler Miller,Scott Spoolman

تمرين 17

Define and distinguish between a food chain and a food web. Explain what happens to energy as it flows through the food chains and food webs of an ecosystem. What is biomass ?What is ecological efficiency? What is the pyramid of energy flow? Discuss the difference between gross primary productivity (GPP) and net primary productivity (NPP), and explain the importance of each.