Read more about the article 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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Read more about the article What informs decisions to manage urban biological invasions?
A framework of key considerations for establishing invasive alien species (IAS) management thresholds to inform decision-making in urban areas and how they relate to the stages of invasion.

What informs decisions to manage urban biological invasions?

Urban areas are foci for the introduction of alien species and very often act as launching sites for invasions into natural ecosystems that adjoin urban ecosystems. Until very recently, the study of biological invasions has focused on developing concepts and frameworks mainly for (semi)natural ecosystems.

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Read more about the article Big trouble for little (crucian) carp
Dr Josie Pegg (South African Institute for Aquatic Biodiversity) with a South African common carp, Cyprinus carpio. (Photo credit: Josephine Pegg)

Big trouble for little (crucian) carp

Common carp (Cyprinus carpio) are highly successful invasive fish and are responsible for the decline of numerous native species. Reasons for their success has been poorly understood until now.

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Read more about the article Horticultural trade drives establishment success in alien ferns
Figure 2 The invasive Holly fern (Cyrtomium falcatum) colonising a wall in the town of Hermanus, South Africa.

Horticultural trade drives establishment success in alien ferns

The high demand for ornamental plants at a global scale, combined with modern and increasingly efficient modes of trade (i.e., e-commerce), highlights the horticultural trade industry as a subject of major conservation concern.

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Read more about the article Volunteers in the management of invasive alien plants
Figure 1. Identified volunteer groups (52) in Western Cape of South Africa. Groups that participated in the survey (26) are indicated by circles that also show group sizes (individual members per group). Groups that did not participate in the survey are indicated by blue circles. The green area on the map represents the fynbos biome.

Volunteers in the management of invasive alien plants

Volunteers play an important role in invasive alien plant species (IAPS) management and are likely to continue doing so into the future. Better co-ordination and engagement between volunteers and mandated authorities on science, policy and management are required to improve the volunteer groups and keep volunteers motivated to manage IAPS.

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