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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

Friday, 23 October 2015 11:31

Aquatic Animals

Invasive aquatic animals require a watery habitat, but do not necessarily have to live entirely in

water.

What are invasive aquatic animals?

These species are nonindigenous species that threaten the diversity or abundance of indegenous species, the ecological stability of infested waters, and any commercial, agricultural, aquacultural, or recreational activities dependent on such waters. They may even harm our health.

How do the spread?

Invasive aquatic animals can be spread in many ways including ships, boats, aquaculture, aquatic recreation and connected waterways. Through these and other means, aquatic invasive species have been introduced into South Africa.

Listed below are the invasive aquatic species according to Categories contemplated in the National Environmental Management Biodiversity Act (2004)Alien and Invasive species regulations 2014.

Wednesday, 21 October 2015 09:56

Academic Papers

These are academic papers relating to invasive species in South Africa. They include current research and projects such as biological control, invasive species traits, invasion biology and the detrimental effects invasive species have on biodiversity, water resources and the economy. They are listed according to year in which they were published.

Tuesday, 20 October 2015 13:56

Invasive Worms

Tuesday, 20 October 2015 11:03

Aquatic Plants

Invasive aquatic plants are introduced plants that have adapted to living in, on, or next to water, and that can grow either submerged or partially submerged in water

Their presence may harm native ecosystems or commercial, agricultural, or recreational activities dependent on these ecosystems. They may even harm our health.

These species can be spread many ways including ships, boats, aquaculture, aquatic recreation, water gardening, connected waterways and many other pathways. Through these and other means, aquatic invasive species have been introduced into South Africa.

Listed below are the invasive aquatic species according to Categories contemplated in the National Environmental Management Biodiversity Act (2004)Alien and Invasive species regulations 2014.

Tuesday, 20 October 2015 10:51

Biocontrol

Using biocontrol agents to control invasive species

What is Biological control?

Biological control is the introduction of the plant’s natural enemies to its new habitat, so that these natural enemies will remove the plant’s competitive advantage. 

In the control of invasive plants, the commonly used biocontrol agents are insects, mites and pathogens (disease-causing organisms such as fungi). These agents will damage the targeted plant by feeding on the stem, root, leaves or flowers of the plants.

History of biological control

South Africa has a long history of biological control of weeds, which began in 1913 with the highly-successful introduction of a cochineal insect against a prickly pear cactus (Opuntia monacantha). Over the succeeding 100 years of biological control use at least 73 plant species have been targets for biological control. Agents have become established on 48 of the targeted species and South Africa remains committed to expanding this area of research.

Monday, 19 October 2015 16:06

Control Methods

How to remove invasive plants As most ecologically aware gardeners already know, getting rid of invasive alien plants (IAPs) is not so easy. Their roots are invasive and their seedlings pop up all over the garden. A number of physical and chemical techniques have proven highly effective. The key to success is to persevere in your programme of eradicating IAPs. Keep removing seedlings and remember to repeat spraying with herbicides at the intervals recommended.

Monday, 19 October 2015 15:05

Media

This Resource section includes various media articles on invasive species. These are sorted into the year in which the article was published. Click on the links to access the article.

Monday, 19 October 2015 14:43

Eucalyptus (Gums)

Gum trees (Eucalyptus sp.) are important commercial trees contributing towards South Africa’s economy, particularly within the forestry industry. They are also used in other sectors, with the bee-keeping industry relying on gums as a bee foraging resource. Six gum trees are regulated under the NEMBA Alien and Invasive Species Regulations.

On this page you will find all the relevant information pertaining to gums and the law.

Monday, 19 October 2015 14:37

Events & Jobs

Find information on vacancies in the sector, upcoming invasive species conferences and invasive species training events.

Friday, 04 July 2014 14:27

Invasive Fish - Trout in South Africa

The international literature on the invasiveness of trout is absolute and overwhelming. Brown trout and rainbow trout are highly invasive species outside of their natural distribution ranges and are listed amongst the world’s 100 Worst Invasive Alien Species by the International Union for the Conservation of Nature (IUCN).)  

Research conducted in South Africa has conclusively found that trout eat indigenous fish, amphibians and invertebrates. Trout live in self-sustaining populations in cool waters and they have to eat to stay alive. These eating habits have a devastating impact on biodiversity.

South Africa's National Environmental Management Biodiversity Act (NEMBA) seeks to protect biodiversity, and under South African law, if the spread of a species may result in environmental harm, the species is declared invasive.