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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

Marine bioinvasions in South Africa – status and states of knowledge

Marine bioinvasions in South Africa – status and states of knowledge
Charles L. GRIFFITHS1, Tamara B. Robinson2
1Centre for Invasion Biology, Department of Biological Sciences, University of Cape Town, Rondebosch 7701
2Centre for Invasion Biology, Department of Botany and Zoology, Stellenbosch University, Matieland, 7602

This presentation aims to gives an updated overview of the current status and state of knowledge of marine bio-invasions in South Africa. The last major published reviews of this topic were those of Mead et al. in 2011. Since then, four species have been removed from the introduced list, one being reassigned as cryptogenic, two having become locally extinct and one being transferred to the terrestrial list. Six species have also been formally added to the list, while others (several barnacles, a porcelain crab, a littoral earwig and a starfish) have been reported, but are yet to be formally included in the list. We introduce these new species and summarize the taxonomic composition of the introduced biota, review their probable vectors of introduction, their areas of origin, their current distributions patterns and their rates of introduction. By applying standardized terminology to categorise the 89 formally accepted species as either ‘alien’ (i.e. species whose presence is attributable to human mediated transport) or ‘invasive’ (i.e. species having self-replacing populations over several generations and which have spread from their point of introduction) we currently recognise 36 alien species and 53 invasive species. We also reflect on the research done on this topic in South Africa to date. Numbers of publications are increasing, but are focussed on few species and largely on distributional studies, with little emphasis of mode of introduction or impacts, and little experimental work.  We conclude by identifying 10 species we consider most in need of further investigation.

Read 3099 times Last modified on Tuesday, 03 May 2016 12:10

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

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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

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28-02-2018

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