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Callum Roberts

5 Podcast Episodes

Latest 18 Jul 2021 | Updated Daily

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From the archive: Callum Roberts on a life spent diving in coral reefs

Science Weekly

As temperatures soar in the UK, the Guardian’s Science Weekly team have decided to pull this episode out of the archive. Prof Callum Roberts is a British oceanographer, author and one of the world’s leading marine biologists. Sitting down with Ian Sample in 2019, he talks about his journey into exploring this marine habitat. Help support our independent journalism at theguardian.com/sciencepod


3 Jun 2021

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Climate Change and Me: Callum Roberts - Episode 1


Five scientists, working in different parts of the world, bear witness to some of the dramatic changes to our planet that have occurred in their lifetimes, as the global climate warms. 1. Marine biologist and underwater diver, Professor Callum Roberts of the University of York, has seen coral reefs that were once multi-coloured and teeming with life reduced to grey, lifeless underwater landscapes with devastating consequences for marine bio-diversity. Just 0.1% of the ocean life is coral reefs but they support more than a quarter of all the species that live in the sea.Produced by Anna Buckley for the BBC Radio Science Unit. First broadcast on Monday 21 May, 2018.


20 Feb 2020

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Callum Roberts on a life spent diving on coral reefs – Science Weekly podcast

Science Weekly

Callum Roberts is a British oceanographer, author and one of the world’s leading marine biologists. Sitting down with Ian Sample, Callum talks about his journey into exploring marine habitats, his subsequent work observing the world’s coral reefs and how, despite the urgent threat posed to the majority of these densely populated habitats, he still maintains an almost unswerving optimism for the future of his profession and of coral reefs in general. Help support our independent journalism at theguardian.com/sciencepod


15 Nov 2019

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EOC 158: The future of ocean conservation with Callum Roberts

Earth to Humans!

For her feature-length film, Sea of Life, the ever-talented Julia Barnes interviewed scientists and activists working to save the ocean and shared an interview with Callum Roberts with Eyes on Conservation. Callum is a marine conservationist, oceanographer, author and researcher based at York University. Julia spoke with Callum about human impacts on the ocean, going back through the history of fishing and looking towards the future of ocean conservation.


18 Jul 2018

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Callum Roberts on the urgent need for marine conservation

The Life Scientific

Callum Roberts, Professor of Marine Biology at the University of York, learnt to dive in a leaky wet suit in the North Sea when he was a boy. As a student, he was introduced to the extraordinary diversity of marine life on a coral reef in the Red Sea. His job was to count different species of fish but he also noticed several different species of fish working together to defend a common resource, lurid green algal lawns. Life on coral reef is notoriously competitive and collaboration on this scale was unexpected. In 1991 he wrote a ground-breaking paper about marine reserves showing how it is possible to have our fish and eat them. It was a radical suggestion at the time. Now many countries are committed to protecting 10% of the ocean in this way by 2020. Aiming to maintain fish stocks in their current state is, Callum says, ridiculously unambitious. On sabbatical at Harvard University, he started reading historical accounts by pirates, travellers and fishermen and his eyes were opened wider still to just how rich marine life could be. As early as the 12th century laws were being put in place to help preserve fishing stocks. Two hundred years ago off the coast of Britain a diverse array of sea fans and sponges covered the sea floor. There were millions of oysters and scallops the size of dinner plates. Producer: Anna Buckley.


1 May 2018