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German wasp | Vespula germanica

German wasp

Vespula germanica

Coral bush | Ardisia crenata

Coral bush

Ardisia crenata

Purple loosestrife | Lythrum salicaria

Purple loosestrife

Lythrum salicaria

Pom pom weed | Campuloclinium macrocephalum

Pom pom weed

Campuloclinium macrocephalum

Canarybird bush | Crotalaria agatiflora

Canarybird bush

Crotalaria agatiflora

Peanut butter cassia | Senna didymobotrya

Peanut butter cassia

Senna didymobotrya

Rubber vine | Cryptostegia grandiflora

Rubber vine

Cryptostegia grandiflora

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Environmental Programmes

In order to tackle our country’s socio-economic challenges, the government adopted the Outcomes based approach to improve government performance and providing focus on service delivery. find out more

A simple method to develop 'watch lists' for invasive species

A simple method to develop 'watch lists' for invasive species
Katelyn Faulkner1,2,3, Mark Robertson2,3, Mathieu Rouget2,4 and John Wilson1,2
1Invasive Species Programme, South African National Biodiversity Institute, Private Bag X7, Claremont, 7735.
2Centre of Excellence for Invasion Biology, Private Bag X1, University of Stellenbosch, Matieland 7602
3Zoology and Entomology Department, University of Pretoria, Hatfield, 0028
4School of Agricultural, Earth and Environmental Sciences, University of KwaZulu Natal, Pietermaritzburg, 3209

Preventing the introduction of high-risk species is often the most logistically and economically efficient form of invasive species management. However, such preventative management strategies must focus on species with a high invasive potential, without unduly restricting personal freedom or commercial activities. To achieve this, methodologies for the prediction of invasive species have been developed around the world, including the development of ‘watch lists’ of species whose introduction should be prevented. However, the development of such watch lists are not always transparent or scientifically defensible. Using South Africa as a case study, we developed a rapid, easily repeatable invasive species risk assessment method. Three basic criteria: a history of invasion, climate match and propagule pressure were used to identify alien plants as either potential future invaders, non-invaders and those requiring further study. Additionally, the use of two climate match methods and three propagule pressure levels were assessed. The resultant models performed well (sensitivity ranged between 95 and 100%) and predicted that between 81 and 99% of alien plant species with a history of invasion elsewhere may have the potential to become invasive in South Africa. This is a promising technique that can be used in any region of the world for the rapid identification of potential threats.

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General News Updates

2019 National Symposium on Biological Invasio…

26-02-2019

This is your invitation to South Africa's 2019 National Symposium on Biological Invasions. The convention is hosted by the Centre for Invasion Biology (CIB), University of Stellenbosch, and the Biolo... Read more

2019 Invasive Species Training

22-01-2019

During the past five years (2014-2018), ISSA invasive species trainers have trained 4 000 in the identification of invasive species and laws pertaining to invasive species across South Africa.  ... Read more

Alien Grass Working Group

04-09-2018

Who are we? The South African National Alien Grass Working Group was jointly initiated by the South African Biodiversity Institute (SANBI) and the Centre for Excellence in Invasion Biology (C·I·B) in... Read more

Permits for planting indigenous Cynodon?

01-03-2018

On 16 February, 2018, South Africa's Department of Environmental Affairs issued amendments to the regulations and lists relating to the National List of Invasive Species.  Updates to the draft&n... Read more

Invasive species training 2018 dates released

28-02-2018

Interested in invasive species?  How much do you know about NEMBA invasive species compliance for landowners and organs of state? The South African Green Industries Council (SAGIC) have released... Read more

Communications post for Africa advertised

25-01-2018

The Nature Conservancy has advertised a brand new post:  Communications Manager, Africa Region. Knowledge of invasive species and water would be an asset in this post. See details below:    Job Titl... Read more