Study area (Campobasso municipality) along with the grid cell types, classified across the urbanization gradient (A) and the first-level EUNIS Habitats (B); HH: high cover (>50%) and high patch number (≥ 20) of artificial surfaces; HM: high cover (>50%) and medium patch number (5 < x < 20) of artificial surfaces; MM: medium-low cover (<50%) with medium patch number (5 < x < 20) of artificial surfaces; ML: medium-low cover (<50%) with low patch number (≤5) of artificial surfaces; J: Constructed, industrial, and other artificial habitats; R: Grasslands and lands dominated by forbs, mosses, or lichens; S: Heathland, scrub, and tundra; T: Forest and other wooded land; U: Inland habitats with no or little soil and mostly with sparse vegetation; V: Vegetated man-made habitats. Red points refer to the occurrences of the target Invasive Alien Plant species recorded during the sampling activities.