The main objective of the measure is to monitor how Invasive Alien Plant percent cover, a recognized stressor to native biodiversity, currently compares to pre-determined thresholds and how it is changing over time across the three different Invasive Plant Management Zones (Integrated Control, Enhanced Control, Ecological Preservation). Permanent, random stratified, transects will be established in each of the three management zones in close proximity to vectors of spread (highways, trails, campgrounds, etc). Percent cover of all detected non-native species will be recorded along each transect using the line intercept method. Data will be evaluated against thresholds defined for each IAP management zone and rules of decision to determine the overall condition of the parks.