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BBC Blue Planet II - Green Seas

Episode five of Blue Planet II, 'Green Seas', looks at the enchanted forests of kelp, mangroves and prairies of sea grass. Among these forests live a plethora of marine life, including sharks and algae.

Find out more about how ocean and marine science at the University of Southampton is helping to understand and preserve our 'Green Seas'.

Catching a shark over a boat edge

Swimming with sharks

PhD student Chris Bird talks about his close encounters with sharks in a mangrove swamp.

Find out more
Dr Jessika Fuessel

Marine bacteria and global warming

Scientists have discovered that a ‘rare’ type of marine bacteria is more widespread and may influence global warming.

Find out more

Our student blog

After each week's episode our MSci students Kieran and Elin will be updating the Exploring our Oceans blog. They will share their thoughts about the episode and relate it back to what they are learning here at Southampton.

This week Elin talks about a case study from her course where otters were removed from a kelp forest and the results were catastrophic and Kieran shares his passion for mangrove forests.

Thumbnail photo of Read Elin Thomas's blog post

“During our first-year marine ecology lectures, we learnt about a phenomenon coined the trophic cascade, and a specific case study from the kelp forests off the west coast of the USA.”

Read Elin Thomas's blog post
Thumbnail photo of Read Kieran Murray's blog post

“Only 6.9% of mangrove forests are protected, and anywhere between 35-86% of mangroves were lost in the last 25 years. ”

Read Kieran Murray's blog post

Expert commentary from our staff

Research undertaken by staff here at the University of Southampton has informed much of the science that is covered in Blue Planet II.

Professor Martin Solan, Professor in Marine Ecology

Professor Martin Solan
Professor Martin Solan examining a community of sediment dwelling invertebrates.

“The green seas episode is a wonderful testimony to the biodiversity of our coastal seas, highlighting the complexity of species interactions and the importance of a variety of habitats in supporting the entire food web. Plankton blooms, kelp forests and seagrass beds form some of the most productive ecosystems of anywhere on the planet, but are often overlooked and are extremely vulnerable to the actions of humans.

The sequence detailing how sea urchins, otters and kelp forests are intimately linked to one another is a good reminder of why it is important to maintain an appropriate ecological balance. At the Biodiversity and Ecosystem Futures Facility in Southampton, we maintain species from polar, temperate and tropical ecosystems and study how altered biodiversity, climate change and other human pressures effect how these systems function. By combining this information with observations we make in natural systems all around the world, we are beginning to recognise and understand how natural and human systems affect once another.”

Find out more about Professor Martin Solan's work and publications.

Take it further...

Seal swimming beneath iceberg. Copyright BBC

Listen to the BBC episode podcast

Dr Jon Copley features every week in the BBC's Blue Planet II podcast, in his 'Catch of the Day' feature. Go to this week's podcast - Sea Cucumbers and Pajama Sharks.

Prof Wiedenmann diving

Inspired to study?

If you have been inspired to study our Blue Planet by the BBC's series, explore of the undergraduate and postgraduate degrees we offer.

Bottlenose dolphins swimming

Explore the next episode

Extend your knowledge of the subjects covered in episode six of Blue Planet II, coasts.

Explore coasts

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