How Sea Otters Fight Global Warming

By David Bois, Tonic

The fact that these creatures are so darn cute is the only excuse some might require to help the conservation efforts on behalf of the endangered sea otter. But according to recent calculations by one University of California researcher, this beloved, iconic Pacific coast critter ó the largest of the weasels, while among the smallest of marine mammals ó offers another terrific reason for us to do what we can to support and boost their populations. It seems as though the sea otter packs a mighty ecological punch in the battle against climate change.

Peter Aldhous, writing in New Scientist, reports that where sea otters live in appreciable numbers and can keep the sea urchins in check, kelp forests will thrive as a result. Conversely, once-thriving kelp forests that lose their otter populations will soon wither as the urchins take over. University of California Santa Cruz professor of environmental studies Chris Wilmers has determined that the carbon dioxide sequestered in the biomass of a thriving kelp forest as a direct result of the otters keeping the kelp’s predators in check is potentially substantial. Wilmers estimates that if the otters were to return to their level of population before a century of fur trading nearly wiped them out, they could contribute to the sequestration of 1010 kilograms of carbon dioxide.

Stated otherwise, as New Scientist points out, this represents an ecological service currently valued at $700 million per the current European Union carbon trading market conditions.

Sea otters, who are native to the Pacific Ocean, are thought to have once numbered between 200,000 and 300,000 before the onset of a mid-18th century fur trade that would dwindle their numbers to no more than 2,000. Conservation has brought them back from the brink, although their numbers recently have leveled off or even declined in some locations.

Wilmers’ calculations, which formed a recent presentation at the Society for Conservation Biology’s annual meeting last week in Edmonton, Alberta, Canada, clearly illustrate the value and importance of balanced predator-prey relationships that characterize a dynamic and healthy ecosystem.

Image Credit: Sstasi via Wikimedia Commons

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Sharon Stein
Sharon Stein3 years ago

WoW! I didn't realize the sea otters actually helped sequester carbon...Thanks!

Charlene Rush
Charlene Rush4 years ago

We must never forget, that our animal cousins have much to teach us.
All we have to do, is pay attention.

Anthea Brincat
anthea brincat5 years ago

why is everything in this century endangered? wonder whos fault it is -.-

K s Goh
KS Goh6 years ago

Thanks for the article.

Janine Kaczynski
janine Kaczynski7 years ago

Otters, one more beautiful gift so our planet is not a barren wasteland.

Lupe G.
Guadalupe G7 years ago


caroline c.
caro s7 years ago

i love otters and now i have even more reason to love them!

Lillian Gargiulo
Lillian Gargiulo7 years ago

This picture of such cte animal makes me sad...
Why human are so stupid???

Laurie H.
Laurie H7 years ago

We need to protect all animals on our planet! These Otters are precious!~ Thanks for this post~

Petra Luna
Petra Luna7 years ago

I'm glad as a species that the Sea Otters know the importance of having a well balanced eco-system! They're smarter than humans!