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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

An assessment of the invasive status of Berberis aristata and B. julianae in South Africa

An assessment of the invasive status of Berberis aristata and B. julianae in South Africa
Jan-Hendrik Keet1,2, Dan’sile Cindi1, Johann du Preez2
1Invasive Species Programme, SANBI; 2University of the Free State

The genus Berberis (Berberidaceae), commonly called barberry, contains approximately 500 species. Berberis species have been distributed all over the world for their horticultural uses, the most popular of which is in the landscaping industry. This has resulted in several species escaping from cultivation and becoming invasive in some parts of the world, including South Africa. Invasive Berberis can have considerable negative environmental and economic impacts, such as altering soil chemistry, lowering veld carrying capacity, preventing access to watercourses when occurring in dense stands, and replacing indigenous vegetation. Several species also serve as alternate hosts for the destructive black stem rust disease of wheat. No formal study has been conducted regarding the history, invasive status or impact of Berberis in South Africa and the aim of this study is to assess the invasion potential of species that have started to naturalize. This study so far has led to the detection of naturalized populations of B. julianae in Golden Gate Highlands National Park (Free State) and B. aristata in the Woodbush State Forest (Limpopo Province). The main population of B. julianae in Golden Gate has approximately 380 individuals while that of B. aristata in Woodbush has approximately 5 500 individuals. Results that will be discussed include seed viability tests conducted on B. julianae, bioclimatic analysis for B. julianae and B. aristata, and weed risk assessments. The research aims to determine whether these Berberis species should be listed in NEMBA as category 1a invaders.

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General News Updates

2019 National Symposium on Biological Invasio…


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


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


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?


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


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


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