Chase's threeawn facts for kids
Quick facts for kids Chase's threeawn |
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| Conservation status | |
| Scientific classification | |
| Genus: |
Aristida
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| Species: |
chaseae
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Aristida chaseae is a very rare type of grass that has a special common name: Chase's threeawn. It is found only in one place, which means it is endemic to Puerto Rico. This special grass grows in just two known spots. These spots are located within the Cabo Rojo National Wildlife Refuge and an area called the Sierra Bermeja.
Because there are so few of these plants left, Aristida chaseae is officially listed as an endangered species by the United States government. This means it is at a high risk of disappearing forever. One big problem for this grass is that it struggles to compete with other types of grasses that have been brought to Puerto Rico from other places. Some of these introduced species, like Brachiaria subquadripara, are invasive. They spread quickly and take over the habitat where Chase's threeawn tries to grow.
What Does Chase's Threeawn Look Like?
Chase's threeawn is a perennial grass. This means it lives for more than two years, often growing back each year. It forms a clump or "tuft" of stems. These stems can grow up to about half a meter tall, which is about 20 inches, or sometimes even a bit taller.
The way the plants grow can depend on where they are found:
- Cabo Rojo Plants: The grasses growing in the deep, rich soils of Cabo Rojo tend to be stronger and bigger.
- Sierra Bermeja Plants: Those found in the Sierra Bermeja grow in poorer, more acidic clay soils with many rocks. These plants are often not as robust.
Where Does Chase's Threeawn Live?
This unique grass lives in specific types of environments in Puerto Rico:
- Cabo Rojo: Here, the plants grow in grassland areas right along the coast. These are open, grassy fields near the ocean.
- Sierra Bermeja: In this area, the grass prefers acidic clay soils. These soils are often found among many rocky outcrops, which are places where rocks stick out of the ground.
Why Is Chase's Threeawn Endangered?
The main reasons why Chase's threeawn is an endangered species are:
- Competition from Other Grasses: As mentioned, non-native grasses like Brachiaria subquadripara are a big threat. They grow fast and can crowd out the native Chase's threeawn, making it hard for it to get enough sunlight, water, and nutrients.
- Habitat Loss: The development of land in the Sierra Bermeja area is another potential danger. When land is used for buildings or other human activities, the natural habitat of the grass, and many other plants unique to Puerto Rico, can be destroyed. Protecting these areas is very important for the survival of this rare grass.
