Marine heatwaves threatening Australia's oyster industry and affecting Great Barrier Reef, scientists warn

Note the dog that didn't bark below.  The people involved are NOT barking about global warming.  They cannot logically do so.  If waters are warming much more rapidly than the global rate, it is not global warming!  Sometimes a tautology is needed

Waters off parts of Australia are warming at some of the most rapid rates in the world, threatening the future of some of the country's most important marine industries, scientists say.

Scientists say the heatwaves are having a severe impact on oysters — and threaten the future of the industry — as well plants and creatures that rely on the ocean for life, pushing some into new areas, while killing others.

"The oceans are really ringing the alarm bells," said CSIRO biological oceanographer Alistair Hobday, a leading expert on MHWs.

"[The oceans] are telling us we've got big problems and those problems are not going to go away."

A MHW is defined as a period of warm water that lasts five days or longer, where temperatures are in the top 10 per cent of events typically experienced in that region.

They are graded in severity — similar to how cyclones are — with category five being the most intense.

The heatwaves lead to outbreaks of diseases that can be fatal to oysters and other molluscs, and reduce the reproduction rates of species such as salmon and abalone as well as killing seagrass and kelp.

"[We thought] marine heatwaves were an example of what the climate would look like in 100 years time," Dr Hobday said. "But we [are] getting it today."

SOURCE