Japanese Knotweed is an invasive plant species that has significantly threatened the biodiversity and ecosystems of the Appalachian forests.

Japanese Knotweed (Fallopia japonica) is a highly invasive plant species introduced from Asia. It spreads rapidly and forms dense thickets, outcompeting native vegetation for resources such as sunlight, water, and soil nutrients. Its presence disrupts local ecosystems, reduces biodiversity, and alters soil chemistry, which negatively impacts native plant and animal species. In the Appalachian region, its aggressive growth has posed challenges to conservation efforts, particularly along riverbanks and disturbed areas. Control measures, such as mechanical removal and herbicides, are being employed, but eradicating this species remains difficult due to its deep root system and rapid growth. This highlights the importance of monitoring and managing invasive species to protect the ecological balance of the Appalachian forests.