#Expert Research: Stunning New Study Shows Tropical Reefs Grow Faster in Cooler Waters

Feb 7, 2023

2 min

Richard Aronson, Ph.D.


Coral reefs off the Pacific coast of Panamá may not be able to keep up with projected sea-level rise over the next century. Upwelling of cool waters will provide temporary relief. Photo by Jennifer Hobbs Wills/Florida Tech.


For thousands of years, cold waters in tropical upwelling zones have hindered the growth and survival of coral species which thrived in warm seas. Stunning new research from Florida Tech shows that corals living in cooler waters are now building reefs faster than nearby corals living in warmer waters.


As climate change continues to heat up the oceans, conditions are now becoming too hot for corals to grow and survive, jeopardizing their ability to continuously build the three-dimensional structures that protect coastlines from storms and provide shelter for marine life. Cooler waters are now helping corals survive the heat stress caused by climate change by lowering the sea temperatures and offering a much-needed reprieve from the heat.


The study, “Upwelling, climate change, and the shifting geography of reef development,” published online today in the Nature journal Scientific Reports, was led by Victor Rodriguez-Ruano, a Ph.D. candidate at Florida Tech, and his advisor Richard Aronson, Ph.D. The study is part of Rodriguez-Ruano’s doctoral research and was conducted in collaboration with colleagues at the Australian Institute of Marine Science, the United States Geological Survey and the National Oceanic and Atmospheric Administration.


Researchers used ecological surveys of coral reefs off the Pacific coast of Panamá to show that reefs exposed to strong upwelling events—when deep, cold water rises to the surface—are building the reef structure at a faster rate than reefs that do not receive the stress-relief of cool waters.



If you're a reporter looking to know more about this topic, let us help with your coverage.


Dr. Aronson is a a department head and professor of marine biology at Florida Tech and a go-to expert on corals, Antarctica and global warming. He is available to speak with media regarding this and related topics. Simply click on his icon now to arrange an interview.

Connect with:
Richard Aronson, Ph.D.

Richard Aronson, Ph.D.

Department Head | Ocean Engineering and Marine Sciences

Dr. Aronson's research combines paleontology and ecology to reconstruct the response of marine communities to environmental changes.

Marine BiologyCoral-Reef EcologyEcologyPaleobiologyAntarctica

You might also like...

Check out some other posts from Florida Tech

5 min

Research Below the Surface

The roots of scuba diving lie in exploration. But in an age when advanced instruments can drive research, too, why not stay dry on land? Researchers have used scuba diving as a tool for decades, but as technology evolves, remotely operated vehicles (ROVs) can aid, and sometimes replace, divers in the research process. Still, argues Stephen Wood, no existing tools have the full capability of a human. The professor of ocean engineering says the ability to grab items or quickly turn one’s head is difficult to replicate in an ROV. He also argues that although robots can collect and send data, the ability to assess and interpret an environment through a human lens is essential. “The human cannot leave” the research, Wood says. The American Academy of Underwater Sciences (AAUS) defines scientific diving as “diving performed solely as a necessary part of a scientific, research, or educational activity by employees whose sole purpose for diving is to perform scientific research tasks.” With more than 140 organizational members, AAUS supports diving as a research tool and protects scientific divers’ health and safety. Researchers and students must obtain an AAUS certification, which Florida Tech offers, before undertaking a scientific dive. At Florida Tech, any diver who plans to use compressed air or air blends for activity involving teaching or research must comply with AAUS. Robert van Woesik, professor of marine sciences, studies the dynamics of coral reefs worldwide. He and his students scuba dive to examine and photograph coral assemblages, then return with information they can use to predict the impact of local and global disturbances, recovery from disturbances and future growth. The ability to personally identify different species underwater is crucial to understanding coral reef dynamics. He says that without scuba, the necessary training to develop that skill falls away. “I think it’s still worthwhile knowing the species composition of a reef underwater instead of just saying, ‘Okay, we don’t need scuba divers anymore. We just need photographs and ROVs,’” van Woesik says. He learns the most when he can descend to a reef and see the seascape himself. “I think there’s something to be said to just go in the water and ask some questions,” van Woesik says. “That’s the valuable part of being able to scuba dive, getting amongst it to experience the reef, in tandem with analyzing photographs from around the world on the computer.” Assistant professor of marine sciences Austin Fox says in his research in the Indian River Lagoon, diving is essential for operating—and sometimes finding—instruments. “We spend a lot of time trying to figure out ways to do this stuff without diving…but there’s just no replacement for it.” Austin fox, Assistant professor of marine sciences Scientific diving has taken Florida Tech researchers across the globe, from the murky floor of the Indian River Lagoon to the depths of Antarctica’s McMurdo Sound. Rich Aronson, department head and professor of ocean engineering and marine sciences, studies coral reefs in the tropics and subtidal communities in Antarctica. In 1997, he had the opportunity to visit the McMurdo Station to study invertebrate ecology—specifically, who eats what and whether they leave traces of their predatory activity on the shells of their prey. There, he completed 27 dives of up to 130 feet deep. Some were done through ice-cracks in remote areas, he recalls, whereas others were from holes drilled through 10 feet of sea-ice. He noted that the time to prepare for these dives was extensive—two 30-minute dives took eight hours—and they weren’t without risk. “That was the first and only time I’ve dived under the ice. It’s dangerous because there’s a ceiling above you,” Aronson says. “You jump in the hole and try not to screw it up because if you screw it up, you’re dead.” Though risky, Aronson says scuba diving was crucial to the research. He argues that neither ROVs nor oceanographic sensors could have collected or sampled organisms at fine scales, run transects and made behavioral observations like a human could. Additionally, he says his observations at depth, such as the “sting of subzero water” on his face and “the slowness of reaction of the animals living down there,” are what later inspired a project of his combining deep-sea oceanography and paleontology to project the future of Antarctic seafloor communities in a rapidly warming world. “Science is a lot more subjective than you might think, and feeling the environment helps you understand it.” Richard Aronson, department head and professor of marine sciences The risky nature of scuba diving is why programs like AAUS exist: to standardize safe and responsible diving practices for conducting scientific research. Divers are at risk for a number of pressure-related injuries, such as decompression sickness: a condition in which residual nitrogen can create bubbles in the blood and body tissue upon ascent if the diver rises to the surface too fast. To reduce their risk, divers must plan and track how deep they are going, the time at which they are that depth (and subsequent depths) and how long they need to wait before changing depth. Technology has also evolved since the beginning of scuba to support divers’ safety further. Digital dive computers, developed in the 1980s, help divers estimate how long they can stay at their current depth while underwater (among other things). Additionally, Enriched Air Nitrox (Nitrox) is a gas mixture that contains a higher percentage of oxygen than standard air. Divers who use Nitrox can extend their time at depth and reduce their risk of decompression sickness because of its reduced nitrogen pressure. Van Woesik predicts that dive technology will keep evolving. He imagines there could soon be a system that allows divers to upload data at depth, and a system that aids in species identification without having to decipher an image at the surface. He also believes that innovators will keep working to reduce hazards and prioritize safety, because despite the risks, divers will always get in the water. “Hopefully that technology will get better so we can go deeper, safer, and so we can stay down a bit longer to explore and further understand the natural wonders of the oceans,” van Woesik says. If you're interested in connecting with Stephen Wood, Austin Fox, Richard Aronson or Robert van Woesik - simply contact Adam Lowenstein, Director of Media Communications at Florida Institute of Technology at adam@fit.edu to arrange an interview today.

2 min

Meet an Expert: Linxia Gu

Name: Linxia Gu Title: Professor of biomedical engineering and science, department head Department/college: Department of Biomedical Engineering and Science/College of Engineering and Science Current research funding: $5 million as co-PI of ASCEND General research focus: My research focuses on developing physically based computational models and conducting mechanical testing to investigate how mechanical stimuli influence cell and tissue responses, providing new insights into the interplay between mechanics and biology. Dr. Gu’s research expertise lies in the biomechanics and biomaterials using both computational and experimental methods. The specific application areas include vascular mechanics and indirect traumatic injury to the brain and eye. Her group is particularly interested in developing multi-scale multi-physics models to study and exploit tissue responses and cellular mechanotransduction, and to gain new mechanistic insights into the interplay of mechanics and human body. The multidisciplinary effort has resulted in > 130 journal papers, and $11 million research funding from NIH, NSF, ARO, and NASA. Q: What has you excited about your current research? The opportunity to bridge the gap between mechanics and biology drives my research. By integrating computational models with experimental data, we are uncovering how mechanical forces influence tissue and cellular responses, particularly in the areas of vascular stenting and traumatic injury to the eye and brain. This had the potential to drive breakthroughs in understanding, prevention and treatment. Q: Why is it important to conduct research? Conducting research is vital for addressing pressing societal challenges and advancing our understanding of complex biomedical systems. Linxia Gu is available to speak with media. Contact Adam Lowenstein, Director of Media Communications at Florida Institute of Technology, at adam@fit.edu to arrange an interview today.

3 min

With Rise in US Autism Rates, Florida Tech Expert Clarifies What We Know About the Disorder

A new report from the Centers for Disease Control and Prevention (CDC) found that an estimated 1 in 31 U.S. children has autism; that's about a 15% increase from a 2020 report, which estimated 1 in 36. The latest numbers come from the CDC’s Autism and Developmental Disabilities Monitoring (ADDM) Network, which tracked diagnoses in 2022 among 8-year-old children.  Autism spectrum disorder (ASD) is a neurological disorder that refers to a broad range of conditions affecting social interaction. People with autism may experience challenges with social skills, repetitive behaviors, speech and nonverbal communication. The news has experts like Florida Tech's Kimberly Sloman, Ph.D, weighing in on the matter. She noted that the definition of autism was expanded to include mild cases, which could explain the increase. “Research shows that increased rates are largely due to increased awareness and changes to diagnostic criteria. Much of the increase reflects individuals who have fewer support needs, women and girls and others who may have been misdiagnosed previously," said Sloman. Her insight follows federal health secretary Robert F. Kennedy Jr.'s recent declaration, vowing to conduct further studies to identify environmental factors that could cause the disorder. In his remarks, he also miscategorized autism as a "preventable disease," prompting scrutiny from experts and media attention. “Autism destroys families,” Kennedy said. “More importantly, it destroys our greatest resource, which is our children. These are children who should not be suffering like this.” Kennedy described autism as a “preventable disease,” although researchers and scientists have identified genetic factors that are associated with it. Autism is not considered a disease, but a complex disorder that affects the brain. Cases range widely in severity, with symptoms that can include delays in language, learning, and social or emotional skills. Some autistic traits can go unnoticed well into adulthood. Those who have spent decades researching autism have found no single cause. Besides genetics, scientists have identified various possible factors, including the age of a child’s father, the mother’s weight, and whether she had diabetes or was exposed to certain chemicals. Kennedy said his wide-ranging plan to determine the cause of autism will look at all of those environmental factors, and others. He had previously set a September deadline for determining what causes autism, but said Wednesday that by then, his department will determine at least “some” of the answers. The effort will involve issuing grants to universities and researchers, Kennedy said. He said the researchers will be encouraged to “follow the science, no matter what it says.” April 17 - Associated Press Sloman emphasized that experts are confident that autism has a strong genetic component, meaning there's an element of the disorder that may not be preventable. However, scientists are still working to understand the full scope of the disorder, and much is still unknown.  “We know that there’s a strong genetic component for autism, but environmental factors may interact with genetic susceptibility," Sloman said. "This is still not well understood.” Kimberly Sloman’s research interests include best practices for treating individuals with autism spectrum disorder (ASD). She studies the assessment and treatment of problem behavior with methods such as stereotypy, individualized skill assessments and generalization of treatment effects. Are you covering this story or looking to know more about autism and the research behind the disorder? Let us help. Kimberly is available to speak with media about this subject. Simply click on her icon now to arrange an interview today.

View all posts