Grassland Biomes
Task: Read the following summary, then, working with a partner complete the concept review. Use the
backside of this paper if you need more space to write.
Summary
Grasslands are ecosystems in which the climate is too wet to be a desert, but too dry to support a
forest. Biotic and abiotic factors such as rainfall, grass fires, and grazing animals help maintain the
growth of grasslands. Most of the biomass of grasses is below the ground. Many of the world’s
grasslands have been replaced by agriculture.
Steppes are considered by many scientists to be either a part of the desert biome or a short grass
prairie. Prairies are important agriculture regions because of the rich topsoil. Many organisms have
adapted to wide climate changes by living underground or by migrating. The diversity of organisms has
been reduced because of human need for food and space. This pattern, although destructive, can be
reversed. When humans work with nature, we have the potential to be a regenerative force on the
planet.
Savannas are topical grasslands where rain is heavy during a short part of the year. Rainy and
drought seasons are major influences, demanding that organisms grow quickly or migrate. Through
adaptations as thorns and runners, many trees, shrubs and grasses are resistant to drought, fires and
grazing animals. The concentration of many animals in small areas has resulted in vertical feeding
patterns.
Concept Review
1. List four factors that influence the development of the grasslands.
2. What factors contributed to the Dust Bowl of the 1930’s?
3. When soil structure collapses, the soil may be removed by high winds. Deduce how the soil may
be affected by rainfall and water flow if the soil structure is no longer absorbent.
4. How can the concept of a vertical feeding pattern be applied to the human population?