undesirable range plants which invade and take over a range after the decreasers and increasers are largely gone

A life history strategy of plants to fire where the plant, through highly dispersive propagules, invades the site after fire.

Plant species that were absent in undisturbed portions of the original vegetation of a specific site and will invade or increase following disturbance or continued heavy grazing. cf. increaser species.

One who invades; an assailant; an encroacher; an intruder.

A designation given to a player at the start of a game after each rolls a die and adds their army's aggression factor. The side with the higher adjusted score is the invader, the other is the defender. Used to determine terrain features, time of day or night, weather, and deployment and should have no impact on how each player actually fights the battle. [page 12

Invader is a street artist who pastes up characters from and inspired by the Space Invaders game, made up of small coloured square tiles. He does this in cities across the world, then documents this as an "Invasion", with maps of where to find each invader.

someone who enters by force in order to conquer