When you picture an ocean habitat worth saving, you probably picture a coral reef. Today we start with the one growing next to it. The first continent-wide review of seagrass restoration in Africa, led by Prof. Sophie von der Heyden at Stellenbosch University and published in the Journal of Applied Ecology, found that only four countries (Kenya, Mozambique, South Africa and Tunisia) have data on whether their seagrass is shrinking or growing. Restoration trials have happened in just six: Mozambique, Kenya, South Africa, Tanzania, The Gambia and Tunisia. More than 250 million people live along Africa's coast, and many of those communities rely on seagrass for fisheries and coastal protection. We look at why restoration is so hard to get right, why the authors say protecting the meadows that remain has to come first, and how remote sensing and AI could help map what nobody is counting yet.
Then we head 50 metres down off the coast of Benin. Surveys in the 1960s found what looked like a deep coral reef and concluded it was probably dead. Nobody went back to check until a team led by Gérard Zinzindohoué of Benin's fisheries and oceanography research institute (IRHOB) used sonar, an underwater drone and a National Geographic deep-sea camera to take a look. They found live coral, with at least eight kinds of coral and eight fish species, including golden African snappers, blackbar soldierfish and Guinean angelfish. It's a mesophotic reef, a deep, low-light community, and old records suggest it could stretch about 40 kilometres along the coast. We cover what the team found, what they haven't confirmed yet, and why "presumed dead" was a guess.
Next time you see a "save the reefs" story, ask: what's growing next door? And next time you read that a habitat is gone, ask: who checked, and when?
Takeaways:
Only 4 African countries have data on seagrass loss or gain, and only 6 have tried seagrass restoration.
Restoration methods are species-specific, so what works in one region doesn't transfer easily to another.
The authors' first recommendation is to protect the seagrass meadows that remain, right now.
Remote sensing and AI could help map and monitor meadows across the continent.
A reef off Benin that 1960s surveys presumed dead is alive more than 50 metres down.
The team identified at least 8 kinds of coral and 8 fish species from video. The corals haven't been sampled yet.
Old records suggest the reef could extend about 40 km along Benin's coast, and the team has surveyed only a small part of it.
What you can do: find out whether your coast has seagrass, support mapping and monitoring, avoid anchoring in seagrass beds, and back ocean exploration led by local scientists.
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