Where is chaparral biome




















Lay of the land: The chaparral biome has many different types of terrain. Some examples are flat plains, rocky hills and mountain slopes. It is sometimes used in movies for the "Wild West". Chaparral is characterized as being very hot and dry. Then there is the summer. Here, you will find short, dense, and scrubby vegetation.

The reason they look like this is because short, dense and scrubby vegetation can survive very well in dry habitats. This is called a drought-resistant strategy for survival. Not all plant populations look like this in the Mediterranean climates, though. Well, Mediterranean plant communities can have several different habitats, too. This is sometimes caused by changes in elevation, because air cools and precipitation increases as you get higher in elevation.

This changes the habitat drastically, and plant populations change when you move from one habitat to the next. For example, at the bottom of the Sierra Nevada mountain range, there are drought-resistant plants because the habitat is dry. As you move high into the mountains, you will see different plant populations because the habitat is wetter and colder.

Plants communities in the Mediterranean climate regions are uniquely adapted to live in dry climates, where water conservation can be a matter of life and death. Trees and shrubs typically lose a lot of water through their leaves in a process called transpiration. To avoid this, plants in the Chaparral have developed thick, waxy leaves to avoid dehydration. We call these types of leaves sclerophyll leaves. As opposed to the soft, juicy leaves found in deciduous forests, these leaves are hard, waxy and inedible.

Often, the leaves contain strong-tasting oils which also help to deter herbivores. Humans are the exception to this rule: We like to munch on inedible things that taste good. Plants like Eucalyptus and Sagebrush produce resins and oils which we use for the pleasant aroma and flavor. Another adaptation that many of these plants share is their ability to lose their leaves when times get tough. Unlike normal deciduous plants, which lose their leaves in the winter, drought deciduous plants lose their leaves in the summer.

This strategy reduces the energy and water demand of the plant and helps to conserve water during the summer drought. Just like you would rather stand up than lay down on a patch of hot sand, plants can move their leaves to avoid exposing their whole surface to the sun.

Would you rather wear all black or all white on a sunny day? While leaves in these regions evolved strategies to stop water loss, roots evolved strategies to help them take up as much water as possible. Typically, we find that plants in the chaparral communities have both a long deep taproot, and a dense network of lateral roots close to the surface.

Some trees in the Eucalyptus genera of Australia can have roots that extend feet in every direction underground! Species of shrubs can have roots that extend 7 feet in every direction and produce thick, woody tubers called burls , which are found at the base of the plant.

These burls are so thick they can even resist being burned all the way through in a fire. Fire, along with drought, is a common visitor to these regions because dry, dense, and oily plants burn easily. Go figure! But fire is a necessary disturbance in these regions; it clears out the excess and recycles the nutrients in the soil.

When the occasional fire does come raging through this habitat, plants deal with it in different ways. About half of the woody species in these regions quickly burn and then re-sprout from the fire-resistant burl at the base of their trunk. Using this strategy, shrubs can regrow to their original size in just a few seasons! Other plants depend on an occasional fire to stimulate seed sprouting.

Many species of plants in these regions will not sprout by watering alone. Instead, the thick outer coating of the seed must be scarred, normally by heat, in order to grow. When the American cowboys and the Mexican vaqueros moved into what is now southern California, they would often have to ride their horses long distances each day to move their herds of cattle. This was a tough job! Not only did they have to deal with long hours, hot, dry weather and intense, and wild-west-style shoot-outs, but the low shrubby vegetation of the area destroyed their pants!

Never mind the outrageous crime and death rate; their Levis were being torn to ribbons! The Spanish had a name for those dungaree-unfriendly landscapes: the chaparro. Rob is an ecologist from the University of Hawaii. He is the co-creator and director of Untamed Science.

There are also many small mammals, reptiles and insects, just like in California. The fynbos of South Africa also has many butterfly species that rely on this habitat. In Santa Barbara we live in the chaparral habitat. The hills surrounding the city are chaparral. The islands off the coast are chaparral. With people living in this dry biome, we have to be concerned about fire. Fire occurs naturally, but can also be caused by human activity. There are many endangered and sensitive species living in this region.



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