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New studies show over one fifth of the world's plants are under the threat of extinction

Galanthus nivalis Common name: snowdrop ConservationA global analysis of extinction risk for the world's plants, conducted by the Royal Botanic Gardens, Kew together with the Natural History Museum, London and the International Union for Conservation of Nature (IUCN), has revealed that the world’s plants are as threatened as mammals, with one in five of the world’s plant species threatened with extinction. The study is a major baseline for plant conservation and is the first time that the true extent of the threat to the world’s estimated 380,000 plant species is known.

Scientists from the Royal Botanic Gardens, Kew, the Natural History Museum and IUCN Specialist Groups carried out the Sampled Red List Index assessments on a representative sample of the world’s plants, in response to the United Nations International Year of Biodiversity and the 2010 Biodiversity Target. The work relied heavily on the vast repository of botanical information held in Kew’s Herbarium, Library, Art and Archives, which includes some eight million preserved plant and fungal specimens; on specimens held in the Natural History Museum’s own extensive herbarium of six million specimens; on digital data from other sources and on collaboration with Kew’s network of partners worldwide.

The Royal Botanic Gardens, Kew’s Director, Professor Stephen Hopper, says: “This study confirms what we already suspected, that plants are under threat and the main cause is human induced habitat loss.

“For the first time we have a clear global picture of extinction risk to the world’s known plants. This report shows the most urgent threats and the most threatened regions. In order to answer crucial questions like how fast are we losing species and why, and what we can do about it, we need to establish a baseline so that we have something against which to measure change. The Sampled Red List Index for Plants does exactly that by assessing a large sample of plant species that are collectively representative of all the world’s plants.”

“We cannot sit back and watch plant species disappear – plants are the basis of all life on earth, providing clean air, water, food and fuel. All animal and bird life depends on them and so do we. Having the tools and knowledge to turn around loss of biodiversity is now more important than ever and the Sampled Red List Index for Plants gives conservationists and scientists one such tool.”

The Sampled Red List Index for Plants is part of a worldwide effort to create a tool to monitor the changing status of the world’s major groups of plants, fungi and animals. In the future, the project will involve reassessments at regular intervals which will chart the changing fortunes of the world’s plants; much like a stock market index shows the ups and downs in the value of shares. This will highlight where and what conservation action is needed to protect plants. However, funding is needed in order to continue this important work.

Image: Galanthus nivalis Common name: snowdrop Conservation status: Near Threatened Widely naturalised, including in UK, however during last decade its native distribution has been reduced

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