02/22/2022: IAS cause yield loss, resulting in serious negative impacts on livelihoods. They are also responsible for the extinction or decline of many species.
Africa may lose about $3.66 trillion annually from the impact of the IAS on agriculture and other vital food production programmes, a 2021 study showed.
The International Union for the Conservation of Nature defines an alien species as a species introduced outside of its natural range. They may be brought in by people accidentally or intentionally into regions where they do not exist.
There are around 18,000 invasive alien species around the world, according to another study by an international team of scientists from 13 countries.
The new study was conducted in Ghana on nearly 200 potentially harmful alien plant species that can affect agriculture, forestry and biodiversity. It was led by the Centre for Agriculture and Bioscience International and published in the journal NeoBiota.
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