Grasslands provide goods and services to support flora, fauna, and human populations worldwide.

Grasslands are the primary source of genetic resources for improving crops, produce forage for domestic livestock, provide habitat for breeding, migrating, and wintering birds, ideal conditions for many soil fauna, and rangelands for wild herbivores.

Examination of grasslands according to watershed boundaries can facilitate integrated resource management. Within watersheds, grasslands absorb rainfall, recharge aquifers, stabilize soils, and moderate runoff. Many physical and biological features of grasslands can be managed effectively in the context of watersheds.

The graph to the left shows the top 10 basins with grasslands extent.