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Showing posts from April, 2014

A THREAT TO BIODIVERSITY..

HABITAT DESTRUCTION- orests all over the world are being cut down and burned for many reasons. Forests in the tropics are cleared to make room for farms, but tropical forest soil is very poor, and so farmers have to keep moving on and destroying more and more forests to grow their crops. Companies also cut down forests for their timber, or to make room for other plantations, in which most native animals and plants cannot survive. Each year, 1% of the world’s tropical forest is destroyed. This doesn’t seem like much but it all adds up, and is not good news for native plant and animal species. Wetlands – lakes, ponds, marshes, swamps and rivers – are also very threatened habitats. INVASIVE SPECIES- Invasive or introduced pest species have caused many native animals and plants to become extinct across the world. Introduced species often have a very harmful effect on native species. For example, 24 rabbits were introduced to Australia in 1859 for hunting. Rabbits breed quickly, and, in...