Impacts of invasive alien species in South Africa reviewed
The number of (A) invasive alien species across broad taxonomic and life-form groupings for which ecological impacts have been quantified in South Africa; and (B) the number of published studies on each group.

Impacts of invasive alien species in South Africa reviewed

A review of the peer-reviewed literature was undertaken at the Centre for Invasion Biology (C·I·B) to determine the level of understanding of the impacts of invasions of all taxonomic groups in all natural and semi-natural ecosystems in South Africa.

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Australian acacias are genetically highly diverse across the globe
Invasive Sydney Golden Wattle (Acacia longifolia) invading areas in Pinheiro da Cruz, Setúbal district, Portugal (photo provided by Sara Vicente).

Australian acacias are genetically highly diverse across the globe

Australian acacias are some of the world’s worst invasive plants and their success has been heavily shaped through their usage by humans for various purposes. C·I·B research members Prof Jaco Le Roux, Prof Dave Richardson and Prof John Wilson, together with colleagues from the University of Lisbon, published a meta-analysis on the genetic diversity of 37 Australian Acacia species.

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Taxonomy and introduction histories of non-native Prosopis populations for their effective management
Members of the research team during a fieldwork expedition in Ethiopia. From the left is Prof. Brian van Wilgen (C·I·B Core Team Member), Prof. Jaco Le Roux (C·I·B Research Associate) and Dr. María Loreto Castillo (C·I·B PhD graduate). (Photo provided by Prof. Brian van Wilgen)

Taxonomy and introduction histories of non-native Prosopis populations for their effective management

Trees in the genus Prosopis (known as mesquite) have been widely planted outside of their native ranges in many countries, and many species are now among the world’s worst woody invasives. The genus contains 44 species from the Americas, South West Asia and North Africa, and several have become major problems in South and East Africa.

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Unscrambling the egg: resolving the introduction history for Silver wattle
Silver wattle (Acacia dealbata) invading along a river in Chile. (Photo credit: A. Pauchard)

Unscrambling the egg: resolving the introduction history for Silver wattle

Researchers at the Centre for Invasion Biology (C·I·B) at Stellenbosch University, found that the introduction histories of the globally important invasive tree Silver wattle (Acacia dealbata) are complex and cannot be generalized.

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Black Alder as an emergent invader in South Africa

An invasive stand of Black Alder was recently detected along the banks of the Dwars River from Kylemore to Lanquedoc, near Stellenbosch in the Western Cape Province, which prompted an investigation into the history and distribution of Black Alder in South Africa.

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