Effect on Mankind

Ironically, as mankind is largely responsible causing exotic species, we are also largely affected by them. Similarly, there are also more negative impacts than there are positive ones, if not at all. Just as how the ecosystem has to adjust to the presence of a new species, so does humans. But in a less drastic way.

Negative effects

New species are always unpredictable. They pose a threat to those who frequent its habitat. Continuing from the previous example, on how Singaporean fishing enthusiast introduced the Motoro Stingray into Singapore’s ecosystem. We see the repercussions when there are cases of people getting stung by the dangerous stingray. Singapore being a small island, there is only limited areas for people to enjoy water sports such as canoeing and fishing, and now have to be wary of the Motoro Stingray during their activities. More information about the Motoro Stingray can be found at this website:

http://www.wildsingapore.com/news/20070506/070525-5.htm

asian carp

Image from: www.newrepublic.com

As mentioned in the introductory video, there are many other animals that pose dangers to humans, such as the invasive Asian Carp, which can throw itself out of the water to injure people.

Also, managing such invasive species is also very costly. Campaigns, measures to keep the invasive species in check can incur a large cost.

Positive Effect

Introduced species, generally improve the diversity of wildlife and plants in the region. Just as how the fishermen introduced the Motoro Stingray to increase the range of fish they can catch, having different species around makes nature more interesting (if it is sustainable, of course).

Introduced species can also act as a temporary solution for some people. As mentioned earlier, Australian companies released cane toads in an attempt to reduce the population of a certain beetle that was eating up their crop. And the cane toad subsequently multiplied and became a problem as there we no natural predators. At the very least though, the issue of the beetle is resolved.