Want to know one of the most hotly debated questions in environmental science? It's this: How fast are species disappearing today? A new paper in the leading journal Science suggests the answer is -- very fast indeed.
The paper, led by ALERT member and Duke University Professor Stuart Pimm with a team of eminent coauthors, makes several key arguments:
- Species extinctions today are occurring roughly 1000 times faster than the 'background' (or natural) rate that prevailed before humans appeared on Earth
- We know where the most imperiled species are located, with particularly big concentrations in the tropical Asia-Pacific region, especially in places like the Philippines, Borneo, and Sumatra
-Other regions with lots of extinction-prone species include the Andes mountains, West Africa, Madagascar, and other scattered pockets of the world
- Millions of species have not yet been discovered (scientifically described or studied) by scientists; for example, huge numbers of plant, insect, fungi, and nematode species are undiscovered, among many others
- Many of the undiscovered species are imperiled because they have small geographic ranges and occur in vulnerable parts of the world -- known as 'biodiversity hotspots' -- that have already lost much of their original habitat
- Protecting the surviving habitats in the biodiversity hotspots is crucial if we are to stave off a dramatic collapse of biodiversity on Earth
For those who care about biodiversity, this paper (which you can download free at the link above) is an authoritative and highly readable summary of what we know, think, and suspect about the future of life on Earth.