1. Invasive Species Invasive vs. Native Species
The Effect of an Invasive Species on an Ecosystem
The Small Asian Mongoose
Controlling Invasive Species
5 Extreme Invasive Species

2. What is an Invasive Species? What is a Native Species?
Come up with a definition for both terms.
With the person beside you, discuss what you came up with and create a new definition for each.
Have your group join another group, join forces, discuss your ideas and create a final definition for each term.

3. Invasive Species – The Story of Bunny

4. Invasive Species
1. Non-native (not naturally found) species which are added to an area. 2. Natural migration due to habitat loss or range extension. 3. A result of human activity.
Japanese Beetle – originally from Japan. It consumes
the leaf material between the veins killing the plant and
will also feed on fruit on the plants if present.
Kudzu – Grows about a foot per day and covers 150,000 acres per year. It costs the U.S. an estimated $6 million annually

5. Native Species
Native species are found in an area as a result of natural processes only.
2. They have developed naturally in a given area over time.

6. The Effect of an Invasive Species on an Ecosystem
There are four major threats invasive species pose.
Invasive species can:
alter the ecosystem.
destroy forests, crops or both.
reduce the beauty or use of the land.
introduce diseases or other negative health effects.

7. 1. Alter the Ecosystem Invasive species grow in number quickly.
Usually due to the lack of predators.
The increased population of invasive species will need food.
This leads to a decline in available food for the native species which leads to a decline or extinction of the native population.
Population growth pattern of a newly introduced species

8. 2. Destroy forests and crops
Invasive species need a lot of food, food they normally get from native trees and plants.
They also love to feed on farm crops such as corn.
In one night, 35 million long-tailed possums will consume an estimated 12,000 tons of New Zealand vegetation. That is about the same weight as 110 million hamburgers!

9. 3. Reduce the beauty or use of the land
Invasive species reduce the water quality and beauty of the landscape.
This will negatively impact wildlife viewing.
Various invasive species can also prevent the enjoyment of natural activities such as swimming and boating.
Example: The Asian Carp

10. 4. Introduction of diseases and health risks
Certain invasive species can introduce diseases previously found in other regions or countries.
Example: Mosquitoes and West Nile virus.
Pesticides which are sprayed to reduce the invasive species population can get into ground water and affect both wildlife and human health.

11. A Tale of Invasive Species Meet Frank and Oliver

12. Example: The Small Asian Mongoose
In the 1880s Hawaii’s sugar cane fields were being eaten by rats.
As a result, one man brought over the Small Asian Mongoose which was supposed to eat the rats and eliminate the problem.

13. Example: The Small Asian Mongoose
The Mongoose instead decided to eat local bird and turtle eggs.
Mongoose breed quickly and soon their population soared.
Currently they cause approximately $50 million in damages to the islands of Hawaii and Puerto Rico every year!

14. Controlling Invasive Species
It’s important to prevent the introduction of invasive species but if they are introduced, you must find a way to get rid of them which can be very difficult.
There are 3 main ways to control invasive species populations.
1) Chemical Control
2) Mechanical Control
3) Biological Control

15. 1. Chemical Control
The use of pesticides: A pesticide is any substance used to kill, repel, or control certain forms of plant or animal life that are considered to be pests.
These pesticides can leach into the waterways and soil which creates a significant risk to everyone.

16. 2. Mechanical Control
Creating barriers (fences) to prevent the movement of species from one location to another.
Removing them by cutting down trees, hunting and trapping or by destroying regions of land to prevent spreading.

17. 3. Biological Control
Bringing in a species from another location which can be used to hunt and kill the invasive species.
Unfortunately, the organism that is brought in to remove the invasive species is also an invasive species and can become just as troublesome or worse.
Example: The Cane Toad was
introduced to Hawaii, the
Caribbean, and the
Philippines to fight pests
in sugarcane fields.

18. 5 Extreme Invasive Species
Asian Carp
Golden Bamboo
Rabbits
Starlings
Cane Toads