Alien grasses occurring in South Africa have been associated with negative environmental and socio-economic impact across the globe. Some grasses can increase the intensity and frequency of fires due to their large biomass, and many grass species invade areas such as agricultural land leading to reduced crop yield and quality.
Even though snails and slugs (gastropods) are some well-known agricultural pests, environmental systems are more vulnerable to alien gastropod impacts. A recent study by C·I·B Hons student, David Kesner and C·I·B Core Team Member, Dr Sabrina Kumschick, at Stellenbosch University on this topic was published in the journal Ecology and Evolution.
Knowing which species to manage amongst all the species introduced outside of their native ranges is a huge challenge. Many factors play a role in the decision making process, one of the most important ones being whether or not the alien species causes harm to native ecosystems and species, or damages the economy.