{"id":1008,"date":"2024-02-07T07:29:00","date_gmt":"2024-02-07T07:29:00","guid":{"rendered":"https:\/\/worldculturepictorial.com\/wcp-blog\/?p=1008"},"modified":"2024-02-10T22:31:35","modified_gmt":"2024-02-10T22:31:35","slug":"once-near-extinct-sea-otters-restore-california-coastline-erosion-by-feasting-on-marsh-crabs","status":"publish","type":"post","link":"https:\/\/worldculturepictorial.com\/wcp-blog\/once-near-extinct-sea-otters-restore-california-coastline-erosion-by-feasting-on-marsh-crabs\/","title":{"rendered":"Once hunted to near extinction, restored sea otters restore degraded coastline, cutting erosion by 90% by chowing down on crabs"},"content":{"rendered":"
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\n\nSea Otters Returned to a Degraded Coastline Ate Enough Crabs to Restore Balance and Cut Erosion by 90%<\/a>
\nAgainst all odds, a distressed California coastal ecosystem is on the mend, in large part, thanks to the insatiable appetite sea otters have for crabs.

\n\nIn a groundbreaking study published this week in Nature, scientists revealed that the return of sea otters to their former habitat in a Central California estuary has slowed erosion of the area\u2019s marsh banks by up to 90%.

\n\nThe resurgence of these charismatic marine mammals to the salt marshes of Elkhorn Slough in Monterey County sparks hope for improving coastal ecosystems and marks a significant ecological success story.

\n\nAt a time when rising sea levels, elevated fertilizer run-off, and stronger tidal currents should be causing the opposite effect, findings show that erosion has been slashed after reintroducing a top predator\u2014the sea otter\u2014whose insatiable appetite for plant-eating marsh crabs is making the difference. \u201cIt would cost tens of millions of dollars for humans to rebuild these creek banks and restore these marshes. The sea otters are stabilizing them for free, in exchange for an all-you-can-eat crab feast,\u201d said senior author and marine conservation biology professor Brian Silliman, Ph.D. at Duke University.

\n\nLike many California estuaries, Elkhorn once was a foraging habitat for sea otters, which need to eat the equivalent of about 25% of their body weight every day\u2014around 20 to 25 pounds of food, with crabs being one of their favorite meals. But after fur traders hunted the local otter population nearly to extinction, the number of crabs exploded over the next century. Crabs eat salt marsh roots, dig into salt marsh soil, and over time can cause a salt marsh to erode and collapse.

\n\nHow do otters protect salt marshes from erosion? Shellfishly<\/a>
\nSea otters are helping to keep the shores of a central Californian estuary from crumbling into the ocean. They act as erosion control by feasting on shore crabs \u2014 crustaceans whose burrowing and vegetation-munching habits contribute to unstable salt-marsh banks.

\n\nBy the twentieth century, humans had hunted sea otters (Enhydra lutris) nearly to extinction for their fur. But conservation efforts have helped population sizes to increase, and otters are re-establishing themselves in their historical haunts, including in the salt marshes of Monterey Bay\u2019s Elkhorn Slough. Moreover, in marsh creeks with high numbers of sea otters, erosion rates are lower than when there were fewer sea otters, researchers report today in Nature. \u201cIt\u2019s remarkable when you think about it,\u201d says Jane Watson, a community ecologist at Vancouver Island University in Nanaimo, Canada. \u201cYou can have a single animal, the sea otter, come in and through predation actually mitigate the effects of erosion.\u201d

\n\nSea otters\u2019 love of crabs gives salt marshes a second chance<\/a>
\n“It would cost millions of dollars for humans to rebuild these creek banks and restore these marshes,” Brian Silliman says. “The sea otters are stabilizing them for free in exchange for an all-you-can-eat crab feast.”

\n\nSea otters are making an impact as they return to the wetlands of Central California, researchers report. Remarkable changes have occurred in the landscape as these adorable animals recolonize their former habitat in the Elkhorn Slough, a salt marsh-dominated coastal estuary in Monterey County. The erosion of creek banks slowed on average by 69% after the sea otter population fully recovered at a time when rising levels, stronger tidal currents, and nutrient pollution should be causing the opposite.

\n\nCalifornia sea otters nearly went extinct. Now they’re rescuing their coastal habitat<\/a>
\nThe California sea otter, once hunted to the edge of extinction, has staged a thrilling comeback in the last century. Now, a team of scientists has discovered that the otters’ success story has led to something just as remarkable: the restoration of their declining coastal marsh habitat.

\n\n(unquote)

\n\nImage courtesy Getty Images<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

(quote) Sea Otters Returned to a Degraded Coastline Ate Enough Crabs to Restore Balance and Cut Erosion by 90% Against all odds, a distressed California coastal ecosystem is on the mend, in large part, thanks to the insatiable appetite sea otters have for crabs. In a groundbreaking study published thisRead More →<\/a><\/span><\/p>\n","protected":false},"author":19,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ep_exclude_from_search":false,"_vp_format_video_url":"","_vp_image_focal_point":[],"footnotes":""},"categories":[5,6,8,11,12],"tags":[44,94,26,27,39,35,54,28,31,69,68],"class_list":["entry","author-wcp-system-thinker","post-1008","post","type-post","status-publish","format-standard","category-figures-and-facts","category-funny-bone","category-life-nature-society","category-science-and-technology","category-us-and-world","tag-animals","tag-conservation","tag-facts","tag-figures","tag-nature","tag-news","tag-ocean","tag-places","tag-science","tag-sustainable","tag-wildlife"],"_links":{"self":[{"href":"https:\/\/worldculturepictorial.com\/wcp-blog\/wp-json\/wp\/v2\/posts\/1008","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/worldculturepictorial.com\/wcp-blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/worldculturepictorial.com\/wcp-blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/worldculturepictorial.com\/wcp-blog\/wp-json\/wp\/v2\/users\/19"}],"replies":[{"embeddable":true,"href":"https:\/\/worldculturepictorial.com\/wcp-blog\/wp-json\/wp\/v2\/comments?post=1008"}],"version-history":[{"count":0,"href":"https:\/\/worldculturepictorial.com\/wcp-blog\/wp-json\/wp\/v2\/posts\/1008\/revisions"}],"wp:attachment":[{"href":"https:\/\/worldculturepictorial.com\/wcp-blog\/wp-json\/wp\/v2\/media?parent=1008"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/worldculturepictorial.com\/wcp-blog\/wp-json\/wp\/v2\/categories?post=1008"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/worldculturepictorial.com\/wcp-blog\/wp-json\/wp\/v2\/tags?post=1008"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}