Science
Red Sea Corals Show Resilience Amid Climate Change Threats
Scientists from Ohio State University have discovered that corals in the Red Sea can withstand warming ocean temperatures, yet long-term exposure to heat stress leads to significant growth reductions and weakened health. This research adds to the mounting evidence of climate change’s detrimental effects on marine ecosystems.
The study focused on a species known as Stylophora pistillata, commonly referred to as hood coral or smooth cauliflower coral, which is prevalent in the Indo-Pacific region. Researchers investigated the impacts of elevated ocean temperatures over a six-month period and found that while these corals can survive in conditions simulating future warming trends, they do not flourish.
Under controlled conditions, corals exposed to temperatures of 27.5 degrees Celsius and 30 degrees Celsius—temperatures anticipated for tropical oceans by 2050 and 2100—displayed notable changes in growth and energy levels. Corals in waters at 27.5 degrees Celsius were found to be 30% smaller than those in the control group, while those in 30 degrees Celsius waters were approximately 70% smaller.
Lead researcher Ann Marie Hulver emphasized the broader implications of these findings. She stated, “In theory, if corals in the wild at these temperatures are smaller, reefs might not be as diverse and may not be able to support as much marine life. This could have adverse effects on people that depend on the reef for tourism, fishing, or food.”
The research results indicate that even the most thermally resilient coral species might struggle to cope with the ongoing consequences of rising sea temperatures. The scientists provided a detailed forecast of how coral reefs may function in the next half-century. With ocean temperatures projected to rise by 3 degrees Celsius by 2100, predicting how coral reefs will adapt to these changes remains a complex challenge.
Understanding the alterations in coral biology due to warming waters is crucial for informing long-term conservation strategies. The findings were published in the journal Science of the Total Environment under the title “Thermally resistant coral Stylophora pistillata survives but does not thrive under chronic elevated baseline temperature.”
As the world grapples with the realities of climate change, this research not only sheds light on the vulnerability of marine ecosystems but also highlights the interconnectedness of environmental health and human livelihoods, particularly for communities reliant on coral reefs.
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