Biomes And Ecosystems Questions Medium
A savanna biome is characterized by a specific set of features and characteristics. These include:
1. Climate: Savannas are typically found in tropical or subtropical regions, with a distinct wet and dry season. The average annual rainfall ranges from 20 to 50 inches, with most of it occurring during the wet season.
2. Vegetation: The dominant vegetation in savannas consists of grasses and scattered trees. The grasses are usually tall and coarse, adapted to survive the frequent fires that occur in the biome. The trees are often spaced apart, allowing for the growth of grasses in between.
3. Biodiversity: Savannas are known for their high biodiversity, supporting a wide variety of plant and animal species. They are home to large herbivores like zebras, giraffes, and antelopes, as well as predators such as lions, cheetahs, and hyenas.
4. Adaptations: The plants and animals in savannas have evolved various adaptations to survive the harsh conditions. Grasses have deep root systems to access water during the dry season, while animals have developed strategies like migration or burrowing to cope with the changing availability of resources.
5. Fire: Fire plays a crucial role in shaping savanna ecosystems. It helps maintain the grassland by preventing the encroachment of trees and promoting the growth of new grass shoots. Many plants and animals have adapted to fire, with some seeds requiring the heat to germinate.
6. Human Impact: Savannas have been significantly impacted by human activities such as agriculture, grazing, and urbanization. These activities can lead to habitat loss, fragmentation, and the introduction of invasive species, threatening the delicate balance of the ecosystem.
Overall, savannas are characterized by a unique combination of grasses, scattered trees, a distinct wet and dry season, high biodiversity, and a dependence on fire. These features make savannas one of the most iconic and important biomes on Earth.