Sea Otters Return To California Wetlands - WHAT HAPPENS WITH THE INVASIVE BLUE CRAB Shock Scientists

Sea Otters Return To California Wetlands - WHAT HAPPENS WITH THE INVASIVE BLUE CRAB Shock Scientists

This documentary follows ecologist Brent Hughes and years of research into how Sea Otter recovery changed the ecosystem. Researchers found that otters were consuming large numbers of European Green Crabs and other burrowing crabs. As crab pressure declined, pickleweed roots held the marsh together more effectively, shoreline erosion slowed, and eelgrass beds began expanding again.

The story reveals how one predator can trigger an ecological chain reaction. The **Invasive European Green Crab** was only one part of a much larger system involving predators, vegetation, shellfish, fisheries, and coastal habitat.

But the recovery also creates difficult trade-offs. Sea otters consume commercially valuable shellfish, raising questions about Conservation Stories, Invasive Species Control, Invasive Animals, Ecosystem Restoration, River Restoration, Animal Engineers, and Nature Based Solutions.

Could restoring a missing predator help repair other damaged coastlines?

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Key Moments:

00:00 Sea Otters Return To California Wetlands
01:19 Invasive European Green Crab
01:46 Invasive species make things worse | European Green Crabs
02:26 They can't eradicate the invasive species | Invasive Species Control
02:50 Another species has also returned
03:59 What Brent Hughes saw at Kirby Park in 2014.
05:07 Experiment proves otters eat crabs 2015
06:51 Results: Erosion reduced by an average of 69%
08:36 Second chain reaction — Otters also help eelgrass revive
10:12 Why doesn't seagrass die?
12:08 HUMANS SPEND MILLIONS OF DOLLARS – OTTER DOES PART OF THE JOB BY EATING
14:14 The Final Stage — Elkhorn Slough from a Small Experiment to a Model for a Larger Plan
18:27 Elkhorn Slough Today | Nature Documentary

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Australia Releases THE LARGEST CARNIVOROUS MARSUPIAL – What Happened Next To Feral Cats: https://www.youtube.com/watch?v=cmHVGSChKV4
Australia RELEASES 102 SUGARCANE TOADS INTO A DEVASTATED FIELD - What Happens Next Shocks Scientists: https://www.youtube.com/watch?v=RqvVxwPhJdM

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