Module 7 Eradications. Learning Outcomes By the end of this module you should be able to: –Know...
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Transcript of Module 7 Eradications. Learning Outcomes By the end of this module you should be able to: –Know...
Module 7
Eradications
Learning Outcomes
• By the end of this module you should be able to:
– Know what eradication is – When and where it might be undertaken – What conditions must be met for eradications to
be successful– Recognise the key steps in undertaking an
eradication operation
What is eradication?
• Eradication is the complete removal of a population of a targeted IAS in a set area within a defined timeframe
When is eradication appropriate?
• Eradication is the most appropriate option as soon as an alien species has been detected – during the lag phase
Pop
ulat
ion
size
Time
Carrying capacity
Lag phase
Explosion phase
What conditions need to be staisfied for successful
eradication?
• All individuals must be put at risk
• Individuals must be removed faster than they reproduce
• Re-invasion risks must be near zero
Other important factors should include:
• Involving only field operators who are committed to the eradication
• Designing an eradication operation so that it succeeds at first attempt
• Monitoring to detect changes
• Consistent and appropriate support from stakeholders
Are there particular areas that offer better chances for eradication
success?
Deciding to proceed with eradication
There are many important issues to consider in deciding to proceed with eradication
– Desired outcomes– Priorities– Available information– Risks
Assessing Feasibility
Feasibility assessments allow decisions to be made about the risks and costs of an eradication operation in relation to anticipated benefits
Ecological factors
Logistics
Social factors
CHOOSING THE METHOD/S OF ERADICATION
Choosing the right combination of methods, their timing, and the people to apply them will be critical to your success
What methods might be used?
Mechanical
Chemical
Biological
How to choose the methods
Know what range of techniques are available and which ones would be
most appropriate for your site
Measuring change - Monitoring
SUMMARY
• Eradication is about achieving desired outcomes • Insular habitats are uniquely suited as places where
IAS may be eradicated • where it is feasible it is the best option for achieving
and sustaining desired outcomes.• Monitoring of IAS – especially when they are at low
densities, will be important – as will outcome monitoring
• Eradication can only be justified if the risks of re-invasion can be effectively managed.