Resilient R.I. State Coral Could Play Role in Saving Coral Reefs Amid Climate Change
麻豆色情片 Professor Koty Sharp says the northern star coral could offer insights to help protect tropical reefs as ocean temperatures rise.

BRISTOL, R.I. 鈥The is just like Rhode Island.
鈥淚t鈥檚 small,鈥 麻豆色情片 Associate Professor of Marine Biology Koty Sharp said on the Rhode Island Report podcast. And it鈥檚 鈥渏ust like Rhode Islanders 鈥 it鈥檚 hardy," she said. 鈥淚t can handle those warm summers and those very cold winters.鈥
That was the case that Sharp made in 2021 when she convinced to make the northern star coral, formally known as , Rhode Island鈥檚 official state coral.
And now that coral has another attribute, Sharp said: 鈥淛ust like Rhode Islanders, it鈥檚 a local that鈥檚 positioned to address global problems.鈥
She explained that her lab recently pioneered a first-of-its-kind genetic manipulation tool in the northern star coral that could be used to give capabilitiesto other corals, such as better withstanding the effects of climate change. Other researchers had been able to knock out a gene, but her team was able to insert a gene into the genome of the coral, she said.
鈥淚t鈥檚 very exciting to us because what it does is it gives us the technology and potential capacity to deliver particular capabilities to corals,鈥 said Sharp, who serves as Director of 麻豆色情片鈥檚 Center for Economic and Environmental Development. 鈥淲hether or not that鈥檚 a gene that could confer the ability to resist higher temperatures and be resilient to warming in some way, it鈥檚 also just about enabling more scientific studies to help us learn more about what controls symbiosis and the stability of these animal/algal partnerships.鈥
She explained that many corals depend on algae to survive. But climate change has resulted in coral bleaching, in which corals expel those symbiotic algae because of stress, often from , causing them to turn white.
鈥淲hen the corals lose those algae, they truly starve to death,鈥 Sharp said. 鈥淪o that is threatening corals across the globe as the ocean temperatures are warming up.鈥
That is a significant problem because while coral reefs occupy less than 0.2 percent of the globe鈥檚 surface, they support more than 25 percent of the fish on the planet, she said.
鈥淭hey are enormous centers of biodiversity for the planet,鈥 Sharp said. And healthy marine ecosystems are crucial for boating, tourism, and the economy, she said. 鈥淪o when we shut down coral reefs, ecologically we鈥檙e shutting down huge sectors of the economy on a global scale. And not to mention, just the beauty of nature.鈥

Attention is focused on this type of research now 鈥渂ecause there鈥檚 a very serious and legitimate sense of urgency about the coral reef crisis,鈥 Sharp said. 鈥淲e need to do something.鈥
But at the same time, researchers are cautious about applying a new technology before fully understanding its long-term implications, she said.
鈥淪cientists are very good at being innovative, and we鈥檙e also very good at being cautious,鈥 she said. 鈥淪o we鈥檙e working on riding the line with that. It鈥檚 a tough problem.鈥
Sharp said researchers also are interested in the northern star coral鈥檚 ability to go dormant during cold winters and then revive.
鈥淲hen it comes back out every year, predictably, it goes through a period that looks a lot like recovery,鈥 she said. 鈥淚ts microbiome shifts from what looks like the microbiome of a diseased tropical coral into the microbiome of what looks like a healthy tropical coral.鈥
So scientists want to delve into what happens in the coral during that period and what they can learn to help other corals become more resilient and recover from disturbance, Sharp said.
During a tour of the university鈥檚 wet lab, Sharp showed how researchers have harvested northern star coral, placing them in tank where they release their egg and sperm in the water.
Once they find each other, they fertilize and start to grow, and researchers are trying to give them the right kind of surface where they can settle and can continue their life cycle, she said.
Sharp pointed to a tank full of different types of surfaces.
鈥淣one of them have worked yet,鈥 she said. 鈥淲e have not yet found the thing that causes a strange larvae to settle in captivity. It鈥檚 stubborn, just like Rhode Islanders.鈥
But, Sharp said, 鈥淭hankfully, so are we. So we鈥檒l find the answer.鈥
The Rhode Island Report podcast is produced by The Boston Globe Rhode Island in collaboration with 麻豆色情片. To get the latest episode each week, follow the Rhode Island Report podcast , , and other podcasting platforms, or listen in the player above. You can .