It’s the ‘Swiss army knife of the sea’. But can kelp survive rising marine heat?

As warming oceans threaten the farming of the sustainable crop, scientists work to make the industry climate resilient

Ocean temperatures have hit record highs this year, growing so hot in some places that taking a dip in the sea feels like stepping into a hot tub. For kelp farmers, who grow an underwater crop with a life cycle highly dependent on temperature, that spells trouble for their harvests – and their nascent industry’s future.

“Over the last 30 or 40 years, we’ve seen a pretty big decline in the kelp populations around Long Island. In large part, that’s due to climate change and water temperatures increasing,” said Michael Doall, a former oyster farmer and marine scientist at Stony Brook University’s School of Marine & Atmospheric Sciences.