MANY more species are at risk of extinction than we thought. That is because some species depend on another for their survival, so if one disappears, many more that have gone largely unnoticed by conservationists will follow.
There are 12,200 species at risk according to the World Conservation Union (IUCN) Red List, the definitive audit of rare, threatened and endangered species. But the true number is likely to be much higher, says a team led by Lian Pin Koh at the National University of Singapore and Robert Dunn at Curtin University of Technology in Perth, Western Australia. In addition to…
