Animals must get access to:
Plants need access to:
If an organism cannot access the resources that it needs to survive, then it will die. Animals can try moving to another habitat to find more resources, but plants cannot move to another location.
Japanese Knotweed is a bamboo-like plant which, as its name suggests, is a species native to Japan. It was introduced into the UK in the early nineteenth century as an ornamental plant for gardens. Because of competition from other native plants, in Japan its growth is controlled and the plant can only grow to a height of around 40 cm. However, in the UK it has no plants that can compete with it so Japanese Knotweed is able to grow at a rate of 2 cm per day and reach heights of over 3 m. This fast growth means that as it spreads it out-competes and destroys all other plants in its path.