Researchers from the University of New South Wales (UNSW Sydney) have estimated that 76.8 percent of corals across the world would catch disease by 2100 amid global warming.
In their new study published in the Ecology Letters journal on Wednesday, the researchers created a data set encompassing 108 papers on global coral disease for a further meta-analysis.
They found that both rising average summer sea surface temperatures (SSTs) and weekly sea surface temperature anomalies (WSSTAs) were associated with global increases in coral disease prevalence.
Rising temperature is associated with global increases in coral disease prevalence, according to the scientists. /VCG
According to the study, global coral disease prevalence tripled to 9.92 percent between 1992 and 2018. When predicting future estimates of coral disease, the model suggested that the disease prevalence could reach 76.8 percent in 2100 if temperatures continue to rise.
Samantha Burke, lead author of the study and Ph.D. candidate at UNSW Sydney, said that the findings highlight the devastating impacts of rising temperatures on coral reefs and the dire need for swift action to mitigate climate change.
"Coral disease is a serious cause of coral mortality globally and reef decline, and our modeling predicts it will only continue to worsen," said Burke.
The scholar warned that as coral disease prevalence climbs across the globe, more corals will become diseased without urgent action taken to address warming temperatures.
At the current stage, scientists have yet to identify many of the disease-causing pathogens. /VCG
"As the ocean warms, it increases coral stress, which can decrease its immune response," said Burke. "Increasing temperatures can also create more favorable conditions for the pathogen causing disease."
At the current stage, scientists have yet to identify many of the disease-causing pathogens.
"It's still relatively unknown whether the microbes associated with diseased coral are the cause or a symptom of disease, just that the coral is sick, and the tissue is dying," Burke said.
"Whether the fungi or bacteria present caused disease or merely fed on the dying tissue is unclear, so researchers need to study it further," she added.
(If you want to contribute and have specific expertise, please contact us at nature@cgtn.com.)