Log in or register to post comments Lake Victoria is the largest tropical lake in the world. There is a lot of biodiversity but its ecosystem is in danger because of the Water Hyacinth. This plant comes from south America and was introduced in Africa in 1800’s. According to scientist, it doubles its mass in 5 days and that is the problem. Indeed, the plant develops quickly, making others plants die. Fishes are also affected because there is a change in their habitat. The Water Hyacinth has also an impact on local people. Fisherman has to travel more than before in order to catch fishes. Most of the time, they have a bad catch because fishes are smaller than before. Dr William Ojwang is a research scientist. He works on this invasive species and tries to find a solution. For hindering the development of the plant, he uses mechanical, biological and manual methods. Language (The language you are writing in) English