Sea otters returned to California’s Elkhorn Slough in 1984 when pollution had severely affected its ecosystem. Their recovery triggered changes across the food web, helping eelgrass beds expand by 600%. A later study found marsh-edge erosion slowed by an average of 69%, as otters reduced populations of root-eating crabs.from Science News: Fresh Discoveries, Research & Breakthroughs https://ift.tt/5ehmKYt
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