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What can some alien species become
Invasive and cause problems
What may alien species have
No predators in an area so their population may grow out of control
What happens if invasive species grow faster than native species
It can cause natural imbalance of the ecosystem as native species can’t compete with them
What could alien species do
Prey on existing species, reducing their number
What may some alien species carry
Diseases which they are immune to, but existing populations are not
What are deliberately done to some species
Introduced to control pest species which is an example of biological control
What does biological control involve
Using living organisms instead of pesticides
What happened in the early days of biological control
The process went wrong and the introduced predator caused a problem
What is an example of biological control GONE WRONG!!
Some bio control populations grew rapidly because they had no predators / ate species apart from the pest species
what can biological control GONE WRONG cause
Negative implications on local wildlife
what are needed for biological control
Research trials to assess the effects of biological control agents on non targeted native species
Note 
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