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South Africa’s first National Status Report on Biological Invasions
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Overview on programme of work
Programme plan (activities, milestones, challenges
and timeframes)
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Monitoring and evaluation
Basic inventory and ecological
research
Assess implications and formulate
appropriate policy
Set goals and implement
management measures
b)
Monitoring and evaluation
Basic inventory and ecological
research
Assess implications and formulate
appropriate policy
Set goals and implement
management measures
Status Report
Why a status report?
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The Institute [i.e. SANBI] …….. must ….. submit a report on the status of listed invasive species ……. within three
years after these regulations come into effect, and every three years thereafter
The report …. must contain a summary and assessment of:
the status of listed invasive species; and
the effectiveness of these regulations and control measures
Legal requirement
This is a team effort…….
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Invasion Symposium, 2016
Drafting team
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Appointment of SANBI/ C•I•B team
Bob Scholes WITS
David Richardson C I B
Christo Marais DEA
Mapula Tshangela DEA
Guy Preston DEA
Peter Lukey DEA
Wadzi Mandivenyi DEA
Bob Scholes WITS
David Richardson C I B
Christo Marais DEA
Mapula Tshangela DEA
Guy Preston DEA
Peter Lukey DEA
Wadzi Mandivenyi DEA
Reference and Advisory committee
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16
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Appointment of SANBI/ C•I•B team
Review and collate available information
Arrange scientific symposium
Identify specialist collaborators
Develop suite of indicators
Assign values to indicators
Final status report
First draft chapters
Peer review by stakeholders and contributing authors
Review by expert group
October 2017
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2
01
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First draft status report
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Wilson et al. in prep. 9
21 indicators
Hierarchical metrics
Confidence levels
Factsheets
Proposed indicators - status of biological invasions
4 high-level indicators (for DEA reports to parliament)
Level of success in managing invasions
Amount of area that suffers major impacts
Rates of introduction
Number of invasive species with major impacts
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Status of pathways in South Africa
Indicator Value Level of confidence
Introduction pathway prominence
Moderate
Rate of introduction per pathway
Low
Within-country pathway prominence
? ?
Within-country dispersal rates ? ?
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Key findings for status of pathways
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• Pathway and date of introduction data were not available for many alien taxa in South Africa.
• Intentional import of alien taxa is increasing with growing trade.
• Number of introductions is likely to increase in the future.
• Better information required to identify and prioritise pathways and to develop and evaluate control measures.
Indicators of alien species status
Indicator Value Level of confidence
Number and status of alien species
High for plants, birds Low for the rest
Extent of alien species High for plants, birds Low for the rest
Abundance of alien species ? Low?
Impact of alien species ? Low
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Key findings for status of species
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• Good data on distribution of terrestrial plants, birds, amphibians and reptiles, but not the rest.
• Remarkable dearth of studies on impacts of individual invasive alien species.
• For alien plants at least, South Africa has a major invasion debt. Many new species arriving, and large increases in invaded area. This is a major cause for concern.
Indicator Value Level of confidence
Alien species richness High for plants and birds
Relative alien species richness ? High to low
Relative alien species abundance
? Low
Impacts of invasions Moderate ??
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Indicators of invaded areas
Key findings for status of invaded areas
• Low confidence in invaded area estimates, due to the current state of data.
• Impacts are set to grow rapidly as invasive alien species enter a phase of exponential growth.
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Indicator Value Value Level of confidence
Inp
uts
Quality of regulatory framework High
Government Expenditure ? ?
Planning Coverage High
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Interventions
Ou
tpu
ts
Pathways treatment Low
Species treated ?
Areas treated Moderate
Indicator Value Value Level of confidence
Ou
tco
mes
Effectiveness of the pathways treatment
? ?
Effectiveness of the species treatment
Low
Effectiveness of the areas treatment
Low
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Interventions
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Thank you
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