Blog Tags: Coral Bleaching
This Sunday marks World Oceans Day, a day officially recognized by the United Nations to honor everything our oceans have to offer. We fight for the oceans every day at Oceana, but today, we’re celebrating one of the most beautiful—and threatened— organisms living under our seas: coral reefs. These precious ecosystems provide habitat for thousands of species and protect our shores from storms and sea level rise, but unfortunately, coral reefs are under threat from ocean acidification, deep-sea trawling, and pollution.
Guest blogger Jon Bowermaster is a writer and filmmaker. In this post, Jon reports from the Maldives on the effects of climate change -- and marine protection -- on the country's waters.
There are few places on the planet as remote as the Maldives. Landfall is a thousand miles away from much of the long string of 1,200 islands, most of which are little more than thin, uninhabited strips of sand. Diving into the heart of a Maldivian lagoon, it is easy to imagine you are alone in a distant paradise.
Yet when I did just that a few days ago, in the heart of the Baa Atoll — 463 square miles of aquamarine Indian Ocean recently named a UNESCO Biosphere Reserve — something didn’t feel, or look, quite like paradise.
The ocean, though jaw-droppingly beautiful, was a bathtub warm 86 degrees F. Diving to its shallow floor it was quickly clear that the realm below sea level here has been badly impacted in recent years by a combination of man and Mother Nature and resulting fast-warming temperatures.
The coral reefs of the Maldives were first badly damaged in 1998, when shifting ocean patterns associated with El Niño raised sea level temps above 90 degrees. The result then was that 70 to 90 percent of the reefs surrounding the Maldives 26 atolls were badly “bleached,” the warm temperatures killing off the symbiotic algae that lives within the coral and gives it color.
While since then many of the reefs have been recovering, according to a report by the Maldives-based Marine Research Center, another warming last year (2010) estimated that “10-15 percent of shallow reef coral is now completely white, while 50-70 percent has begun to pale.”
This is the eleventh in a series of posts about this year’s Ocean Hero finalists.
Today’s featured junior ocean hero finalist is 12-year-old Dylan Vecchione, who was nominated for his commitment to coral reef conservation.
When you picture the impacts of climate change, what animal comes to mind? Is it a polar bear floating on a thin chunk of ice, or maybe another cold climate species losing habitat like a walrus or a penguin?
Add butterflyfish to your thoughts about climate change, because a new study predicts that they, along with one-third of all coral reef fish, are losing reef habitat and are locally threatened with extinction from climate change.
Coral reefs are threatened by two aspects of carbon dioxide emissions, ocean acidification and climate change. Corals are susceptible to sustained periods of warmer water temperatures due to climate change, which causes them to bleach when they expel algae, turning them white.
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