Here and

Gone

Researchers discover an alarming decline

of plankton in the ocean.

◆ (^) Define an ecosystem and explain how it differs from an ecological community.
◆ (^) Compare and contrast nutrient and energy cycles.
◆ (^) Place the members of a specified ecosystem into an energy pyramid at the
appropriate trophic level.
◆ (^) Identify where on Earth a specified biome is found, and compare its relative
productivity to other biomes.
◆ (^) Define net primary productivity (NPP) and explain its significance to studies
of ecosystems.
After reading this chapter you should be able to: