Corals are integral (essential) in ocean life

From an Article by Jordan Davidson, EcoWatch.com, February. 20, 2020

Researchers have released a sobering study showing that all of the world’s coral reefs may be lost to the climate crisis by 2100. The bleak outlook means that restoration efforts will face Herculean challenges, according to the research presented by researchers at this week’s Ocean Sciences Meeting 2020 in San Diego, California.

Rising sea temperatures, acidic water and pollution are proving too much for the reefs to handle. About 70 to 90 percent of the world’s existing coral reefs are predicted to disappear in the next two decades, according to scientists from the University of Hawaii Manoa.

“By 2100, it’s looking quite grim,” said Renee Setter, a biogeographer at the University of Hawaii Manoa in a statement.

While pollution poses a large threat to many ocean creatures, corals seem most at risk from emissions, according to the researchers. “Trying to clean up the beaches is great and trying to combat pollution is fantastic. We need to continue those efforts,” Setter said in a statement. “But at the end of the day, fighting climate change is really what we need to be advocating for in order to protect corals and avoid compounded stressors.”

To make their predictions, the scientists simulated future ocean conditions like sea surface temperature, wave energy, acidity, pollution and overfishing in areas where corals are today. Looking at those models, the scientists found that most parts of the ocean will not sustain habitats for corals by 2045, and almost no suitable habitats will exist by 2100.

“Honestly, most sites are out,” said Setter in the statement.

Coral reefs nurture about 25 percent of marine life and support local economies worldwide. The new research is disheartening for efforts to restore corals by growing them in labs and then putting them back into the ocean. While those efforts have had a 60 percent success rate, the research suggests that lab-grown corals will not stand up to warming oceans and increased acidification.

Corals are extremely sensitive to ocean temperatures. When the temperature rises just a couple of degrees, corals experience mass bleaching, where coral turns white as it sheds the algae it relies on not only for survival, but also for its magnificent colors. Bleaching does not kill the coral, but it does weaken them, making them vulnerable to disease.

Scientists are predicting a mass bleaching within the next couple of weeks in Australia’s Great Barrier Reef. The reef, which is nearly the length of Italy, is undergoing heat stress right now, with patches starting to bleach. While a major widespread bleaching has not occurred yet, scientists have warned that it is likely if high ocean temperatures around the reef do not drop in the next two weeks.

Already, temperatures across two-thirds of the reef are about two to three degrees Celsius above normal, with typical peak temperatures still one month away.

“We are down to the wire,” said professor Terry Hughes, director of the ARC Centre of Excellence for Coral Reef Studies at James Cook University.

The National Oceanic and Atmospheric Administration has placed the Great Barrier Reef on Alert Level 1 for the next week, meaning significant bleaching is likely, according to the Australian Broadcasting Company.

“Unfortunately we are a whisker away from bleaching disaster yet again because of global warming-driven marine heatwaves,” said Shani Tager from the Australian Marine Conservation Society to the Australian Broadcasting Company.

“As underwater heatwaves threaten once again to cook our corals, our politicians must move beyond half-baked plans to tackle global warming.”

##########################

See also: Stony Corals Seem to Be Preparing for a Mass Extinction, Scientists Report – EcoWatch, Jordan Davidson, March 4, 2020

Veterinarian Gundi Rhoades lives in Inverell, NSW, Australia

From an Article by Gundi Rhoades, Sydney Morning Herald, December 26, 2019

Bulls cannot breed at Inverell. They are becoming infertile from their testicles overheating. Mares are not falling pregnant, and through the heat, piglets and calves are aborting.

My work as a veterinarian has changed so much. While I would normally test bulls for fertility, or herds of cattle for pregnancy, I no longer do, because the livestock has been sold. A client’s stud stock in Inverell has reduced from 2000 breeders to zero.

I once assisted farmers who have spent their lives developing breeding programs, with historic bloodlines that go back 80 years. These stud farmers are now left with a handful of breeders that they can’t bear to part with, spending thousands keeping them fed, and going broke doing it.

Cattle that sold for thousands are now in the sale yards at $70 a head. Those classed as too skinny for sale are costing the farmer $130 to be destroyed. They are all gone and it was all for nothing. The paddocks are bare, the dams dry, the grass crispy and brown. The whole region has been completely destocked and is devoid of life.

For 22 years, I have been the vet in this once-thriving town in northern NSW, which, as climate change continues to fuel extreme heat, drought and bushfires, has become hell on Earth.

Here, we are seeing extreme weather events like never before. The other day we had about eight centimetres of rain in 20 minutes. These downpours are like rain bombs. They are so ferocious that a farmer lost all of his fences, and all it did was silt up the dam so he had to use a machine to excavate the mud.

Most farmers in my district have not a blade of grass remaining on their properties. Topsoil has been blown away by the terrible, strong winds this spring and summer. We have experienced the hottest days that I can remember, and right now I can’t even open any windows because my eyes sting and lungs hurt from bushfire smoke.

For days, I have watched as the bushland around us went up like a tinderbox. I just waited for the next day when my clinic would be flooded with evacuated dogs, cats, goats and horses in desperate need of water and food.

The impact of the drought on wildlife is devastating to watch, too. Members of the public are bringing us koalas, sugar gliders, possums, galahs, cockatoos and kangaroos on a daily basis.

The koalas affect me the most. To see these gorgeous, iconic animals dying from thirst is too hard to bear. We save some, but we lose just as many.

The whole town is devastated. My business has halved. But with no horses to breed, no cattle to test and care for, what am I going to do? I have worked day and night to build a future for my family, but who would want to buy our property out here? Who would want to buy a vet clinic in a town where there are no animals to treat because it’s too hot and dry? Where the cattle become infertile from the 40-degree heat. All this on black, baked ground.

I am 53 years old. Can I start again?

Climate change for us is every day, and I am not suffering on the same level as my friends, my clients and the helpless animals I treat. As a veterinarian I am becoming more and more distressed, not just about the state of my town, but the whole world.

Bushfire smoke moves over Inverell.

Personally, I have had weeks when I just cry. It just bloody hurts me. I also have times when I get really angry and I start to swear, which I have never done in my life.

I also have times when I think about the potential this country has to create a renewable future with clean, green energy, and end our reliance on fossil fuels.

You only have to look at how resilient our farmers are in the face of devastating, extreme weather conditions to understand that we can make a powerful, meaningful difference to our future.

The government has no idea what it’s like for us. It has no empathy. Its members don’t know how much it hurts when they just say yes to another coal mine.

I would invite Scott Morrison (Prime Minister) to come and see what life in Inverell is like. In case he chooses not to, I’ll paint this picture for the country and hope people can start to realise and understand the devastating impact climate change is having. I hope they will take a stand for the people, the places and the animals whose voices are too small for him to hear.

>>> Gundi Rhoades is a veterinarian, scientist, mother, beef cattle farmer and member of Veterinarians for Climate Action.

#######################

See also: ‘The Darling River will die’: Scientists say mass fish kill due to over-extraction and drought | The Guardian, February 18, 2019