Archive for June, 2010

Impact of Introduced Species

invasive pigs

Invasive pigs

The term introduced species refers to the introduction of exotic or non-native species to an area foreign to them. Although some environmentalists might vouch for this introduction, yet in a broader perspective the impact of introduced species is serious. Environment and diversity of plant and animal life can be affected by the introduction of non-native species. The problem has to be dealt with care before it goes out of hand. Following are some of the problems that have arisen due to the introduction of non-native species:

  • Invasive species has led to the endangerment of nearly half the native species in America
  • The introduced species can change the habitat which in turn leads to the extinction of native species that thrive in the particular habitat
  • If the non native species do not bring a change in the habitat, they can otherwise lead entire groups or single species to endangerment.
  • There could be depletion in the food resources
  • Native species can be and have gone extinct due to the alteration of the gene pool by breeding with them.
  • The introduced species can lead to an invasive meltdown that is to trigger such destructive traits in the native species.

Examples of such impacts are as follows:

  • The American chestnut was virtually eliminated by the Asian chestnut blight fungus. This led to the extinction of ten species of moths that survived on these chestnut trees.
  • The paperback that replaced the native plants in South Florida are prone to fire and have certainly increased the fire frequency in the area. Many mammals and birds species have depleted due to the dependence on these plant communities.
  • The native bird species of the forests of Guam have been eliminated due to the predatory brown tree snake that had been introduced from the Admiralty Islands
  • Parasites have also led to the extinction of certain species of fishes.

Addressing the Problem

There have been ways that have been adopted to tackle the problem. Some of them have been beneficial while others have not been so successful. These ways are as follows:

  1. The most cost effective way to deal with the problems created by the introduction of species is by keeping the damaging invaders out of the way. This can be achieved by stopping the entry of invading species to the land.
  2. Eradication of foreign species in case the above method fails.
  3. Biological, mechanical and chemical control measures can be adopted to control the invasive species.
  4. Ecosystem management is the latest technology that is being used to manage invaders by the system of regular treatment of an entire ecosystem that favors the native species over the exotic invaders.
  5. Various government agencies have come up to address the problem jointly in a bid to manage invaders. Because increased travel and trade are also causes of the introduction of foreign species care has to be taken when pursuing such activities.

The global measures that are being taken are a step towards bringing an end to this invasion and protection of the native species and in turn the ecosystem.

You are currently browsing the The Wildlife Blog blog archives for June, 2010.


  • June 2010
  • February 2010
  • Categories