The Oriental bittersweet is a vine that was transported to the United States from Asia in 1860. Oriental bittersweet escaped from gardens and has spread into natural areas where it is not native. When the vine takes over natural areas, native vegetation cannot compete with it for the resources they need. The scientists in this study wanted to learn more about the relationship between different amounts of sunlight and the germination and growth of Oriental bittersweet. Topics: Wilderness, Biodiversity, Invasive Plants, Nonnative Species, Oriental Bittersweet, Seed Germination.