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SkinWalker
Post  Post subject: Some corals adjusting to rising ocean temperatures  |  Posted: Fri Apr 25, 2014 12:42 am
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http://news.stanford.edu/news/2014/apri ... 42414.html

Through an innovative experiment, Stanford researchers led by biology Professor Steve Palumbi have shown that some corals can – on the fly – adjust their internal functions to tolerate hot water 50 times faster than they would adapt through evolutionary change alone. The findings, published April 24 in Science, open a new realm of possibility for understanding and conserving corals.

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This is truly good news.


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iNow
Post  Post subject: Re: Some corals adjusting to rising ocean temperatures  |  Posted: Fri May 20, 2016 8:39 pm
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What will be the implications if the coral reefs continue to decline? What will happen to the local ecosystem, to the chemistry of the water, to the food chain, to us??

http://www.aims.gov.au/docs/research/cl ... rowth.html
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AIMS has identified widespread and rapid decline in the growth rate of massive Porites coral colonies on the Great Barrier Reef, with rising sea surface temperatures and coral bleaching episodes causing a decline in coral calcification.

Coral calcification is the rate at which reef-building corals lay down their calcium carbonate skeleton. It is a measure of coral growth, which is important for healthy reef ecosystems.

AIMS’s recent study of the central Reef has demonstrated that mass bleaching events could suppress coral calcification rates for up to four years.

This research comes in the wake of our 2012 study, which revealed a loss of over 50 per cent of the coral cover since 1985 due to storm damage, crown-of-thorns starfish and coral bleaching.

AIMS has previously revealed a decline in coral calcification since 1990, with our first study showing a 14.2 per cent decline and a later calculation of 11.4 per cent.

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Lynx_Fox
Post  Post subject: Re: Some corals adjusting to rising ocean temperatures  |  Posted: Sat May 21, 2016 2:30 pm

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Good to see empirical evidence that documents the adaptive range of corals and their associated ecosystems). Of course the elephant in the room is here: " They can't respond to indefinite temperature increases and they could be compromised by stressors such as acidification and pollution. " Meaning, like many ecosystems, surviving coral reefs might only survive in fragmented locations where local conditions can mitigate the combined effects wiping them out most places.


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Moontanman
Post  Post subject: Re: Some corals adjusting to rising ocean temperatures  |  Posted: Tue May 24, 2016 4:13 pm
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Corals are a lot more adaptable than people used to think. I used to grow live coral for aquariums. When i started everyone said it couldn't be done, Corals grew too slowly and had to have various parameters that were impossible to reproduce.

Coral turned out to be relatively easy to grow and propagate, nearly all coral in the pet trade now days is cultured in large vats and can be grown to the point of filling up a large aquarium in just a couple years. Large coral heads that were supposed to be 100s of years turned out to be easy to grow in very short time frames.

I think wild corals will adapt to change at least as well as captive corals do. Change is hardest on established coral heads, the larger they get the more sensitive they get to changing conditions. Trying to take a large coral head from the wild and grow it usually ends in disaster. But take a small fragment and give it reasonable conditions and it will grow and adapt to the new conditions.

In captivity corals are exposed to higher and lower temps as well as changing or different other water quality parameters and they thrive! .Old large coral heads might die back but the young corals just starting out will adapt.

Siltation and opaque water is a real danger, corals live on light, cut that off and they die...


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