Showing posts with label barrier. Show all posts
Showing posts with label barrier. Show all posts

Sea Simulator Shows Ocean Heat Does Not Increase Coral Acidification

Though heat itself may damage the Great Barrier Reef, higher levels of acidity due to raised temperatures will not increase coral bleaching. Too much carbon dioxide in the atmosphere ends up absorbed in the surface of sea water. This raises acidity.
Australian National Sea Simulator
There is not a direct relationship between acidification and coral bleaching . However, the kinds of animal life present in an area will be changed by more acid conditions. The whole ecosystem of the reef will be altered forever. Both heat and more acidity will cause this.

Tests have been done with the national sea simulator which gives quite specific results. The Sea Sim is new technology. It is being given test runs at present. Acidification and heat together do not raise coral bleaching. This is a major finding. Scientists are now going down a new path.

The new premise came from a combined research program using the Sea Sim and hands on tests off the coast of Papua New Guinea; so coral itself is relatively safe, but the animal community that lives arounds them is under threat.  Our grandchildren will not see the wonder of the world as we know it  
 Chemistry by Ty Buchanan
            Australian Blog   Adventure Australia
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australian national sea simulator tests research coral bleaching acidification increasing sea temperatures 

Climate Change Could Make Timid Animals More Aggressive

Climate change will cause changes in behavior. As water becomes warmer so some species of fish become aggressive. Some fish are inherently timid while others are bold. In experiments on fish from the Australian Barrier reef, when water was slowly warmed normally timid fish became aggressive. Their rate of activity increased as well. Evolution has created fish that fit into a niche where survival depends on a fish being very careful about its surroundings. If they openly attack larger fish it could mean the smaller ones will be eaten.

It is possible that similar changes will occur with reptiles, amphibians, ectotherms and even mammals. If timid animals become bold then they could be killed off by predators or by humans using harvesting equipment trying to catch other animals for food. Only a very small increase in temperature led to the change.

In the tests, fish were bred in captivity then released into holding tanks where the water was slowly warmed. They had no chance to socialize with wild fish. When the water was cool the fish hid in plastic pipe. As the water heated up the fish ventured further from the protective pipe.

Certain assumptions can be made from this research. As the Arctic ice disappears, Polar bears wandering near small towns in Alaska, Canada and Northern Europe could become more brazen in their search for food from garbage cans and dump sites. They could kill humans more frequently in their anger. Similarly, rats living in these cold climes may not just die of shock when hit. They could turn on people and fight back.
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