Tropical and subtropical grasslands, savannas, and shrublands

Warm lands have big fields of grass.

Some places have a few trees too. These areas do not get much rain. The rain can fall all at once.

Some trees drop leaves to save water. Other trees store water in their trunks. Many big animals live in these lands. They eat the plants to stay strong. You can find these places in Africa. They are also in parts of Asia.

These lands are full of life.

Warm lands have many fields of grass. These places are called grasslands. Some areas have more trees. We call these areas savannas. Other places have many shrubs. These are called shrublands.

These lands do not get much rain. The rain can be very seasonal. This means it may all fall in two weeks. Drought is also very common. Many plants have ways to stay alive. Acacia trees drop leaves to save water. Baobab trees store water in their trunks.

Many big animals live here. They eat the grass to stay strong. In Africa, animals like zebra and wildebeest move in large groups. We call this migration. This move is getting smaller now. This happens because of hunting and changes to the land.

You can find these lands on almost every continent. They are not in Antarctica. They are in Africa and parts of Asia. You can also find them in Australia. They are in the southern United States too.

Tropical and subtropical grasslands are special parts of our world. These areas are called biomes. They are mostly covered by grasses or small shrubs. Some places are called savannas when they have scattered trees. These lands are often semi-arid or semi-humid. This means they are not very wet or very dry. They sit in warm parts of the Earth. Most are near the Equator between 5 and 20 degrees.

Rainfall is the main thing that shapes these lands. Most of these areas get between 25 cm and 150 cm of rain each year. The rain can be very seasonal. Sometimes, all the rain for the year falls in just two weeks. This makes drought a very common problem. In the Sudan climate, there is a hot and rainy season. This season starts in May and lasts until September in the Northern Hemisphere. The rest of the year is cool and dry.

Plants have clever ways to survive the dry times. Acacia trees lose their leaves to save moisture. This helps them live when water is hard to find. Baobab trees use a different way to stay hydrated. They store water inside their thick trunks. These plants grow in many different types of soil. In Africa, savannas sit between forests and open grasslands. You might see miombo or mopane habitats there too.

Many large animals live in these warm grasslands. They eat the many plants found there. African savannas have the most diverse groups of animals. For example, wildebeest and zebra move in large groups. This movement is called migration. These large migrations happen in East Africa and the Zambezian region. Some groups, like the Ugandan Kob, still move in the Sudd region. However, these large moves are declining due to hunting and land changes.

These biomes are found almost everywhere on Earth. You can find them on every continent except Antarctica. They are very widespread across the continent of Africa. You can also find them in South and Southeast Asia. They exist in northern South America and Australia. Even the southern United States has these lands. It is amazing how these grasses and shrubs grow in so many places.

Tropical and subtropical grasslands, savannas, and shrublands are unique terrestrial biomes. The World Wide Fund for Nature defines this biome by its specific plants and climate. These regions are dominated by grasses and or shrubs. They are located in semi-arid to semi-humid climate zones. These zones sit in subtropical and tropical latitudes. Most tropical grasslands exist between 5 and 20 degrees from the Equator.

Because they receive limited rainfall, they cannot support thick forests. Instead, they host diverse life shaped by seasonal water levels.

Rainfall is the primary driver of this biome's ecosystem. Annual rainfall typically ranges from 25 cm to 150 cm. This precipitation is often highly seasonal and can be unreliable. In some cases, a whole year's worth of rain falls in just two weeks. This creates a cycle of wet and dry periods. In the Sudan type of climate, seasons alternate between hot and rainy and cool and dry. In the Northern Hemisphere, the hot rainy season usually begins in May and ends in September. As you move North in the Northern Hemisphere or South in the Southern Hemisphere, rainfall levels decrease. This pattern makes drought a very common occurrence in these regions.

This biome is divided into several distinct types based on vegetation. Grasslands are areas dominated primarily by grasses and herbaceous plants. Savannas are a specific type of grassland that includes scattered trees. Shrublands are different because they are dominated by woody or herbaceous shrubs. These variations depend on how much water is available in the soil. In Africa, savannas often act as a transition zone. They sit between dense forest or woodland regions and open grassland regions. Some African habitats include complex mosaics of miombo and mopane environments.

Plants in these biomes have evolved specific biological strategies to survive. For example, the acacia tree manages water by losing its leaves during the dry season. This process helps the tree conserve its internal moisture. The baobab tree uses a different method for survival. It stores water directly inside its thick trunk to use during dry periods. These adaptations allow the flora to persist despite the frequent droughts. These plants provide the necessary forage for a wide variety of animals.

Large mammals are a defining feature of these tropical and subtropical habitats. These animals have evolved to take advantage of the abundant forage available. The biodiversity of large mammals is highest in African savannas and grasslands. The most intact animal groups are found in the East African Acacia savannas. They also exist in the Zambezian savannas. These animals are part of complex food webs that rely on the seasonal growth of grasses and shrubs.

Many species participate in large-scale migrations to find food and water. Notable examples include the wildebeest (Connochaetes taurinus) and the zebra (Equus quagga). These migrations are currently declining due to hunting and habitat alteration. Significant migrations now primarily occur in East Africa and the central Zambezian region. In the Sudd region, the Ugandan Kob still performs large-scale migrations. While some areas like the Guinean and Sahelian savannas have lost much of their abundance, these remaining migrations are vital to the ecosystem.

These biomes are found on nearly every continent on Earth. They are absent only from Antarctica. They are extremely widespread across the African continent. You can also find them throughout South Asia and Southeast Asia. They exist in the northern parts of South America and in Australia. Even the southern United States contains these types of lands. This global presence shows how resilient these grassland and shrubland systems can be.