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 Acidity threatening our reefs...

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Sam_G
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Join date : 2011-01-15
Posts : 2530

PostSubject: Acidity threatening our reefs...   Wed Jul 11, 2012 10:08 am

http://www.newsnet5.com/dpp/news/science_tech/science-official-ocean-acidity-major-reef-threat-wcpo

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~Samantha snorkel

Founder and Former President of the Aquarist Club at USF

100 Gallon Mixed Reef Aquarium

47 Gallon Macroalgae DT
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Sam_G
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Join date : 2011-01-15
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PostSubject: Re: Acidity threatening our reefs...   Fri Jul 13, 2012 10:18 am

I've heard for years that temperature rising is a huge concern, but I never thought about rising acidity levels... Neutral

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~Samantha snorkel

Founder and Former President of the Aquarist Club at USF

100 Gallon Mixed Reef Aquarium

47 Gallon Macroalgae DT
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Iceelover



Join date : 2011-07-14
Posts : 241

PostSubject: Re: Acidity threatening our reefs...   Tue Jul 17, 2012 3:03 pm

Oh yes. A very interesting problem. Some people suggest it will cause an evolutionary change in the material corals build themselves with. It's happened in the past.
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Iceelover



Join date : 2011-07-14
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PostSubject: Re: Acidity threatening our reefs...   Tue Jul 17, 2012 3:06 pm

It's kind of a long article, but this is an excerpt

Reefs are large underwater structures of coral skeletons, made from calcium carbonate secreted by generation after generation of tiny coral polyps over sometimes millions of years of coral growth in the same location. The team showed that corals can switch from using aragonite to another mineral, calcite, in making the calcium carbonate. They make that switch in response to decreases in the ratio of magnesium to calcium in seawater, Ries said. That ratio has changed dramatically over geologic time.

Though most scientists believed that corals were programmed to produce only the aragonitic form of calcium carbonate, he said, the team's work reveals that corals are far more flexible and able to vary at least a portion of their skeleton to growth favored by seawater chemistry. He postulates that this "mineralogical flexibility" provides corals with an "evolutionary advantage," as it would take more energy for corals to produce skeletons that are not favored by the chemistry of the seawater surrounding them

http://www.sciencedaily.com/releases/2006/07/060706095218.htm
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Sam_G
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Join date : 2011-01-15
Posts : 2530

PostSubject: Re: Acidity threatening our reefs...   Tue Jul 17, 2012 6:25 pm

Very cool! Smile I didn't know corals could switch like that to build their skeletons. I can't imagine a world without reefs, so it's comforting to know that corals have some tricks up their sleeves. We need to do our conservation part too though.

__________________________________________________________________
~Samantha snorkel

Founder and Former President of the Aquarist Club at USF

100 Gallon Mixed Reef Aquarium

47 Gallon Macroalgae DT
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PostSubject: Re: Acidity threatening our reefs...   Today at 6:54 am

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