Canadian Kelp Forests Store Enough Carbon to Rival Established Climate Solutions
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📰 The quick summary: New research from Canada reveals kelp forests capture between 40,000 and 400,000 metric tonnes of carbon annually that reaches deep ocean storage, making them potentially valuable natural climate solutions alongside forests and wetlands.
📈 One key stat: Canadian kelp forests capture and export 40,000-400,000 metric tonnes of carbon to the deep ocean yearly, comparable to established natural climate solutions like tidal marshes and seagrasses.
💬 One key quote: “Overall, a precautionary approach is needed to ensure we don’t miss out on future kelp solutions. That’s because even as interest in kelp grows, these ecosystems are disappearing in many places.”

1️⃣ The big picture: Scientists are exploring kelp forests as potential natural climate solutions alongside forests, grasslands, and wetlands. A comprehensive national assessment of Canada’s kelp forests reveals these underwater ecosystems absorb significant amounts of carbon, with a portion reaching deep ocean storage where it stays out of the atmosphere long-term. The research team, part of Blue Carbon Canada, assembled a national database using satellite mapping, productivity measurements, and ocean current models to track kelp carbon’s journey. While kelp forests grow incredibly fast and capture substantial carbon, determining how much remains sequestered long-term has been challenging until now.
2️⃣ Why is this good news: Kelp forests demonstrate impressive carbon capture abilities, with Canadian kelp storing up to 400,000 metric tonnes of carbon annually in deep ocean sinks. This carbon storage capacity rivals that of established climate solutions like tidal marshes and seagrasses, suggesting kelp deserves consideration in climate strategies. Beyond carbon benefits, these underwater ecosystems support marine biodiversity, sustain fisheries, protect shorelines, and contribute to coastal economies and livelihoods. The research provides other countries with a valuable blueprint for conducting their own kelp carbon assessments, even with limited data, helping advance global understanding of these ecosystems.
3️⃣ What’s next: Canada needs to invest in closing knowledge gaps through better kelp forest mapping, monitoring, and high-resolution oceanographic modeling. Scientists must determine how much kelp forest loss can be prevented under climate change and scale up restoration methods like green gravel. A precautionary approach must balance realistic expectations about kelp’s climate mitigation potential while protecting these valuable ecosystems.

Read the full story here: The Conversation – Can kelp forests help tackle climate change?



