At Least 241 Invasive Plants Mapped in 7 South Asian Countries; India Tops List

 

NEW DELHI — Scientists from India and six other countries have compiled a list of 241 plant species that have been introduced to South Asia and have become invasive alien species (IAS) over time. India has the most such plant species, with 185.

The study, published in the journal PeerJ, found that the number of IAS in South Asia has increased significantly in recent decades, largely due to globalization and increased trade. The introduction of these species has had a negative impact on native ecosystems, agriculture, and human health.

The study's authors say that their findings underscore the need for greater awareness of the problem of IAS in South Asia and for more effective measures to prevent their introduction and spread.

Key Findings of the Study:

• A total of 241 IAS have been identified in seven South Asian countries: India, Pakistan, Bangladesh, Nepal, Bhutan, Sri Lanka, and the Maldives.
• India has the most IAS with 185 species, followed by Pakistan with 108 species and Bangladesh with 97 species.
• The most common IAS in South Asia are herbaceous plants (136 species), followed by woody plants (68 species) and aquatic plants (37 species).
• The introduction of IAS has had a negative impact on native ecosystems by displacing native species, disrupting ecosystem processes, and altering habitat structure.
• IAS have also had a negative impact on agriculture by reducing crop yields and spreading diseases.
• IAS have also had a negative impact on human health by causing allergies, poisoning, and respiratory problems.

Recommendations of the Study's Authors:

• Increase awareness of the problem of IAS among policy makers, scientists, and the general public.
• Strengthen border controls to prevent the introduction of new IAS.
• Develop effective control measures for existing IAS.
• Promote the use of native plants in landscaping and horticulture.

The study's authors say that their findings provide a valuable resource for policymakers and scientists working to address the problem of IAS in South Asia. They say that their work will also help to raise public awareness of the issue and promote the development of more effective measures to prevent the introduction and spread of IAS.