How Scientists Are Breeding Heat-Resistant Kelp to Restore Vanishing Ocean Forests
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📰 The quick summary: Scientists and conservationists worldwide are accelerating efforts to save kelp forests from ocean warming through selective breeding, urchin removal, and AI-powered monitoring, protecting ecosystems that support thousands of species and contribute billions of dollars in economic value.
📈 One key stat: An estimated 40 to 60 percent of kelp forests worldwide have been lost or significantly degraded in the last 50 years, making restoration efforts more urgent than ever.
💬 One key quote: “Kelps are one of the fastest growing plants on the planet,” said Albert Pessarrodona, a research fellow at the University of Western Australia, adding that they uptake “as much carbon as tropical rainforests per unit of area.”
1️⃣ The big picture: Kelp forests, which once lined roughly a third of the world’s coastlines, are vanishing at an alarming rate, disappearing twice as fast as coral reefs and four times faster than tropical rainforests. Ocean warming, urchin population explosions, and coastal pollution have collectively wiped out an estimated 40 to 60 percent of these ecosystems in just 50 years. Beyond sheltering thousands of marine species, kelp forests sequester significant amounts of carbon, with roughly 62 million tons carried into the deep ocean each year. Recognizing their ecological and economic importance, scientists and conservation organizations on multiple continents are now scaling up restoration efforts. Strategies range from selective breeding of heat-tolerant kelp strains to AI-powered ecosystem monitoring and large-scale urchin removal programs.
2️⃣ Why is this good news: Researchers at institutions like the Woods Hole Oceanographic Institution and the Scripps Institution of Oceanography are successfully developing kelp varieties that can better withstand warmer waters, giving restoration teams hardier plants to work with. South Korea has already demonstrated that large-scale kelp restoration is achievable, now boasting over 71,600 acres of restored kelp forest with a national goal to re-green 75 percent of its coastline. Sea otter populations, a key natural predator of kelp-devouring urchins, have recovered to over 3,000 individuals in Northern California and are staging a comeback along the coasts of Washington and British Columbia, naturally benefiting kelp ecosystems. Scientists have recently isolated the bacterium behind sea star wasting disease, opening a real path toward breeding disease-resistant sunflower sea stars that can be reintroduced to help control urchin populations. New satellite monitoring tools and AI-driven ecosystem models are helping conservationists identify exactly where resources can make the biggest difference, making restoration efforts smarter and more efficient.
3️⃣ What’s next: Experts stress that localized kelp restoration projects, most currently covering fewer than 100 acres, need to be significantly scaled up to meaningfully reverse habitat loss. Aquariums in California and Oregon are working to develop antibiotic treatments and disease-resistant breeding programs for sunflower sea stars so they can eventually be released into the wild. Reducing greenhouse gas emissions remains the critical long-term factor, as continued ocean warming risks replacing kelp forests with far less productive turf algae on a permanent basis.
Read the full story here: Grist – Efforts to save kelp forests from ocean warming are ramping up
