6 June
Integrated Writing TPO15
The lecture refutes the three methods mentioned in the reading passage of stopping the spread of the cane toad in Australia. For the first measure, building national fence, the lecture claims that rivers and strings will bring young toads from one side of the fence to another. According to the lecture, parts a national fence will be unavoidably built on rivers, and because young toads and eggs are small in volume they will flow with the river through national fence. And then, they can propagate in the other side of the fence. Therefore, building national fence is an ineffective way to stop spread of cane toad. As for the second way, the lecture argues that volunteer may destroy their country's native frog, and this is bad to their ecosystem. Because toads are similar in shape, especially when they are young, it is difficult to tell cane toad from their native frog. And some of their frog species are already in danger; fault operation of volunteers may cause them to extinct. As far as the last way is concerned, the lecture holds the point view that using of virus may cause damage to other country's ecosystem, so is not a good way. Considering that insect collector may transfer toads from Australia to other countries like south Africa, and the virus carried by cane toads will threaten the native frog species of South Africa can cause damage to their ecosystem. |