The exotic plants that were once cherished for their beauty are a threat to our native plants. Plants such as the South American banana poka are vines that kill native plants in Hawaii's rainforest by suffocating them. They block out their oxygen and sunshine. As the vines kill the trees and let in too much light, like a chain reaction, the second and third layers in the rainforest are also harmed. Recently, another plant invader from South America that is considered as one of the most dangerous threats to Hawaii's ecosystems is the miconia. In Tahiti it is called "the brown tree snake of the plant world" because it can choke out many native plants.
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