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Existing invasive exotic species and the potential introduction of new invasive species pose a threat to forest biodiversity and function. The PEI National Park invasive species composite measure consists of two annual field measurements: the percentage of forest ecosystem with invasive species...

Invasive alien plants (such as Japanese knotweed, woodland angelica) are considered a serious problem for many protected areas. Fundy National Park reports on the presence of priority invasive species in grid cells; the grid overlays the entire national park.