 Some impacts of habitat degradation include; when native animals, insects and birds become vulnerable and put at risk; loss of food source for native wildlife; disruption of native plant-animal relationships ie pollination and seed dispersal and disconnection of plant-host relationships.Highly adaptive plants chosen for their ease of cultivation out compete more specialised species.Weed invasion of a forest system can change the processes of plant succession (the system of one species replacing another due to disturbance factors), the composition of the plant community and the composition and availability of nutrients.