The damage that invasive species can cause to the environment and the economy are well known, but impacts on human health have been much less analysed. However, invasive species can cause impacts ranging from psychological effects, phobias, discomfort and nuisance to allergies, poisoning, bites, disease and even death. Invasives experts Giuseppe Mazza and Elena Tricarico of the University of Florence, Italy say that in addition to these direct effects, some work in more indirect ways. Humans are menaced by alien invasive species affecting the services provided by ecosystems. “These services are vital to our well-being: changes may decrease the availability of drinking water and of products from fisheries, agriculture and forestry, alter pollination and impoverish culture and recreation,” say Mazza and Tricarico.
Around 30-40% of crops around the world are lost to insect pests thereby affecting the ability of the 500 million small-scale farmers around the world to contribute towards the goal of achieiving zero hunger and ending poverty. Reducing losses by just 1% could feed millions more people but many countries in the Developing World need support to implement biological control programmes to reduce food losses.
As part of CABI’s mission to help farmers grow more and lose less, we have been funded by USAID – via the United States Department of Agriculture (USDA) – to help Pakistan improve its sanitary and phytosanitary (SPS) systems and therefore open up its fruit and vegetables to more high-end global markets that were previously untapped. Currently these products only contribute 13% of the country’s export but improvements to its SPS capabilities could see this number rise significantly.
By Urs Schaffner
Over the last few years, biological invasions have become a regular topic in the news. Today the general public is probably better informed about the negative environmental and economic impacts alien invasive species can cause than ever before. However, concern about invasive species and the search for methods to sustainably manage them has a much longer history, dating back to the 19th century.
Picture: ©Muséum de Toulouse/Didier Descouens-2013. CC BY-SA 3.0
Some of the species that are included in our open-access Invasive Species Compendium are well known to the general public, for example
Japanese Knotweed. Others are more obscure, and I had never heard of the
Asian Hornet, Vespa velutina, until I
edited the datasheet about it earlier this year. I was therefore
interested to hear an item about it a few days ago on the Today programme, one of the best-known programmes on BBC
radio (you can listen to the item here).