Non-native small mammal species for sale in South Africa
Examples of non-native small mammal species sold as pets in South Africa. Pictures were taken from different advertising websites in the present study (photograph Gumtree, PublicAds)

Non-native small mammal species for sale in South Africa

Small mammals are amongst the most charismatic animals widely sold as pets around the world. Increasing trade for these pets has resulted in several species releases and escapees from captivity. Consequently, several small mammal pets have become invasive...

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Guava invasion facilitates changes in some soil properties
Guava (Psidium guajava L.) an invasive alien tree species that is widely distributed in South Africa, where it negatively impacts soil physico-chemical properties. (Photo credit: Sheunesu Ruwanza)

Guava invasion facilitates changes in some soil properties

Guava (Psidium guajava L.) is a commercially grown small tree, which also invades pastures and abandoned fields in South Africa. The tree acts as a pioneer species in recovering degraded landscapes thus making ecological restoration a challenge.

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The worldwide invasion of the Asian long-horned beetle
The Asian long-horned beetle, Anoplophora glabripennis. (Photo credit: Dr Marion Javal)

The worldwide invasion of the Asian long-horned beetle

Repeated introductions from both the native and the invaded ranges of a major tree pest, the Asian long-horned beetle (Anoplophora glabripennis), has enhanced its establishment and spread. These were some of the findings of a paper recently published in the journal Molecular Ecology.

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What can we learn about predicting impacts of alien predators from a globally invasive crab?
The number of mussel prey eaten by European shore crabs in native and various alien regions. (Graphic: Howard et al., 2018)

What can we learn about predicting impacts of alien predators from a globally invasive crab?

Because resources for addressing environmental problems are limited, it has been suggested that management should focus on those species that have the highest impacts in their new environments. Comparing the ability of alien and native species to utilize resources has been shown to offer a sound approach for identifying alien species with high impacts.

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Port Jackson impacts the restoration of <em>Protea repens</em> long after its removal
Mlungele Nsikani in the greenhouse where the Sugarbush growth trials took place. (Photo credit: Zama Mahlobo-Nsikani)

Port Jackson impacts the restoration of Protea repens long after its removal

The growth of our native Sugarbush (Protea repens) is not negatively affected by the legacy of altered soil chemistry after the clearing of invasive Port Jackson (Acacia saligna).

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