06 Dec 2010: Analysis
\nIs the End in Sight for
\nThe World\u2019s Coral Reefs?
\nIt is a difficult idea to fathom. But the science is clear: Unless we change the way we live, the Earth’s coral reefs will be utterly destroyed within our children’s lifetimes.
\nby j.e.n. veron<\/p>\n
Over the past decades, there have dozens of articles in the media describing dire futures for coral reefs. In the 1960s and \u201870s, we were informed that many reefs were being consumed by a voracious coral predator, the crown-of-thorns starfish. In the 1980s and \u201890s, although these starfish still reared their thorny heads from time to time, the principal threats had moved on \u2014 to sediment runoff, nutrients, overfishing, and general habitat destruction.<\/p>\n
For me, an Australian marine scientist who has spent the past 40 years working on reefs the world over, these threats were of real concern, but their implications were limited in time or in space or both. Although crown-of-thorns starfish can certainly devastate reefs, the impacts of sediments, nutrients and habitat loss have usually been of greater concern, and I have been repeatedly shocked by the destruction I have witnessed. However, nothing comes close to the devastation waiting in the wings at the moment.<\/p>\n
You may well feel that dire predictions about anything almost always turn out to be exaggerations. You may think there may be something in it to worry about, but it won\u2019t be as bad as doomsayers like me are predicting. This view is understandable given that only a few decades ago I, myself, would have thought it ridiculous to imagine that reefs might have a limited lifespan on Earth as a consequence of human actions. It would have seemed preposterous that, for example, the Great Barrier Reef \u2014 the biggest structure ever made by life on Earth \u2014 could be mortally threatened by any present or foreseeable environmental change. …more<\/a><\/p>\n