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Large areas that had been alive for centuries or millennia were crumbling and bleached, indicating urchins had recently killed them. And so it essentially protects the seagrass.". Neither your address nor the recipient's address will be used for any other purpose. T. Wright et al. A handpicked selection of stories fromBBC Future,Culture,Worklife,TravelandReeldelivered to your inbox every Friday. To communicate the science behind these concepts to a wide and diverse audience, I hosted a virtual Lightning Talk event with my employer, the Seattle Aquarium. PDF What makes the sea otter a keystone species? - FWS J Toxicol Environ Health. As sea otters have been reintroduced or naturally recovered in other coastal areas of North America, they have substantially disturbed the structure and dynamics of nearshore food. Sea otters help ecosystems capture carbon from the atmosphere and store it as biomass and deep-sea detritus, preventing it from being converted back to carbon dioxide and contributing to climate change. Learn more about structure and function of the surrounding ecosystem. This explanatory language, which accompanied the 2021 Appropriations Act, also instructed the Service to study the feasibility and cost of reestablishing sea otters on the Pacific Coast of the contiguous United States. We measured the abundance of sea urchins (biomass density), kelp (numerical density) and fish (Catch per unit effort) at four islands in the mid-1980s (when otters were abundant at two of the islands and rare at the two others) and in 2000 (after otters had become rare at all four islands). Rudolf, Wilmers and Rasher all say their work shows that future climate change research needs to factor in ecosystem complexity more effectively. 2020 Feb;192(2):391-401. doi: 10.1007/s00442-019-04578-8. Other marine mammals have high metabolisms to cope with cold water, too, but they also often rely on large bodies and blubber to stay toasty (SN: 12/14/18). Its headline proclaimed, The extinct sea otter swims back to life..