3B. Explain how any one of the factors given on the diagrtam contributes to a loss of biodiversity in tropical rain forests.

• Alien species introduced to a tropical rainforest will reduce biodiversity because the alien species may be an aggressive plant and therefore remove natural materials, minerals and substances taken up by the indigenous plants thus killing these plants and reducing biodiversity. Slight changes in the amount of substances cause significant harm to many types of plants in a forest.
• Some Alien species may also be prolific, reproducing extremely fast, using intense amounts of substances and killing pre-existing plants.
• Alien Species may also be immune to disease in the area and predators may avoid such Alien species
• Alien species may also be harmful fungi or bacteria. These species may cause harm or feed on the indigenous plants. In turn reducing biodiversity.