Compare grazing and detrital food webs. Why would they both be present in the same ecosystem?
Why are drinking water supplies still a major concern for many countries?
The extremely low precipitation of subtropical desert biomes might lead one to expect fire to be a major disturbance factor; however, fire is more common in the temperate grassland biome than in the subtropical desert biome. Why is this?
In what ways are the subtropical desert and the Arctic tundra similar?
Describe the conditions and challenges facing organisms living in the intertidal zone.