Coral bleaching. No, this is not a hot new trend floating around the underwater world. It’s one of the many devastating effects of climate change.
Jason Buchheim, marine biologist, explained in his article how coral and zooxantheallae live in a symbiotic relationship together. The zooxanthellae (we’ll call them ZooPals for short. It’s easier to pronounce and they “make eating fun”!) aid coral in photosynthesis, providing carbon compounds for energy, calcification, and nutrients. It also provides photosynthetic pigments to the naturally translucent tissues of the coral. In return, the coral provides the ZooPals with a safe place to live and steady supply of carbon dioxide (par. 6).
Bleaching occurs when 60-90% of ZooPals are expelled due to coral being stressed. Like when people stress and get gray hair! Because ZooPals are the reason for coral's vibrant colors, when they are lost it appears bleached (par. 10).
Picture courtesy of marinebiology.org
Basically everything stresses these coral guys out: temperature change, UV radiation (Cough, cough. Ozone depletion.), sea water dilution from rain, change in pH from acid rain. What do all these have in common? They’re caused by climate change!
Occasionally, if the stress and bleaching isn't too severe, the coral will recover and return to its daily life, whatever that may be. Unfortunately, if the coral stress continues, ZooPal expelling continues. This decreases the chance of repopulating and the coral host dies (par. 11).
Courtesy of twistedsifter.com
Coral Reefs are one of the most diverse ecosystems on the planet. In Anup Shah, founder of the website Global Issues, explained in his article "Coral Reefs: Ecosystems Of Environmental And Human Value" how reefs also benefit humans. Shah states, "Reefs cover an area of over 280,000 km2 and support thousands of species in what many describe as the 'rainforests of the seas'" (Shah par. 1).
For example, they protect ours shorelines from the impact of waves. Sea levels are rising as it is; they can't afford more waves coming in eroding the shores. Because coral reefs are located in shallow water they break up and slow down these waves before they reach the shores.
Reefs also provide us with food and medicines. Where do you think those tropical fish you love to eat on vacations lived? The coral reefs! These fish would be a real hit on MTV Cribs. Not only are these fish tasty, they also provide many health benefits like heart healthy fish oil. Also, they are major tourist attraction (Shah par. 3). Cha-ching!
Courtesy of google.com
All these great benefits would be lost without the coral reefs. It would just be an eerie ghost town abandoned by Nemo and his friends.
Coral bleaching is often lost and neglected in all the climate change hubbub. Along with polar bears losing their icy homes, coral reefs slowly dying off is also a major environmental issue. Maybe the coral just needs to man up and quit being a bunch of pansies. But hey, they’re only coral!
Works Cited:
Buchheim, Jason.Coral Reef Bleaching. Odyssey Expeditions: Tropical Marine Biology
Voyages. marinebiology.org. Web. 21 Nov. 2013.
Gonzalez-Rivero, Manuel. "The White Spectres of Death Underwater."
New Scientist (2013): Vol. 220 Issue 2939, p14-41. Web. 21 Nov. 2013.


