Sea star wasting disease is still present in P. ochraceus populations in 2018 and likely still exerting selection on susceptible individuals in otherwise seemingly somewhat resilient populations. Since 2013, millions of sea stars native to the Pacific coast of North America from Baja California to southern Alaska have succumbed to a mysterious wasting disease in which their limbs pull away from their bodies and their organs exude through their skin; a disease researchers say could trigger an unprecedented ecological upheaval under the waves. The current bout of SSWS was first noted in ochre stars ( Pisaster ochraceus ) in June 2013 along the coast of Washington state during monitoring surveys conducted by MARINe researchers from Olympic National Park (ONP). eCollection 2019. Jaffe N, Eberl R, Bucholz J, Cohen CS. Map of locations along the Pacific Coast with observed sea star wasting disease. The sunflower sea star (Pycnopodia helianthoides) is highly susceptible to sea star wasting disease.The authors of a 2019 paper published in Science Advances document the rapid, widespread decline of sunflower stars and discuss the ecological implications of ��� The progression of wasting disease can be rapid, leading to death within a few days, and its effects can be devastating on sea star populations. Sea Star Wasting Disease Posted on March 15, 2017 at 2:04 pm. (Photo by Ben Miner) (Photo by Ben Miner) Beginning in 2013, a mysterious disease crippled sea star populations up and down the U.S. west coast. Recently however, a severe disease outbreak occurred in a group of very well-studied organisms���sea stars along the west coast of North America. Figure 5: Category 1 sea star with lesions on the arm. Figure 4: Map of sea star wasting disease sightings along the west coast of North America. Credit: Multi-Agency Rocky Intertidal Network The Multi-Agency Rocky Intertidal Network (MARINe) , who first discovered this wasting event in June 2013 in Washington, maintain a large-scale monitoring program that spans most of the west coast of North America. doi: 10.1371/journal.pone.0225248. SSWD is currently affecting more than twenty species of sea stars in nine families. Divers with ��� The combination of symptoms that have been collectively described as ���sea star wasting disease��� is believed to be a strong factor. Disease outbreaks can have substantial impacts on wild populations, but the often patchy or anecdotal evidence of these impacts impedes our ability to understand outbreak dynamics. Now scientists believe that it may be respiratory distress. Map of locations along the Pacific Coast with observed sea star wasting disease courtesy of Multi-Agency Rocky Intertidal Network. First, the sea star's legs begin to curl up. We analyzed nearly two decades of data from a coordinated ��� Sea star wasting syndrome has baffled beach-goers and scientists along the West Coast, including observers of Skagit County���s marine shorelines, ��� Marine scientists track spread of sea star wasting disease 6 November 2013, by Tim Stephens Tissue is disintegrating on two arms of this sea star affected by sea star wasting syndrome. Sea Star Observation Log Please continue to send in tracking logs after spending time diving or tidepooling. Sea star die-offs have been observed in past decades, but none were at this geographic scale. Mike Doherty | Program Naturalist If you visited the Center recently, you may have noticed an odd-looking sea star or two. The sea star wasting disease is devastatingly affecting sea star populations up and down the west coast and parts of the east coast. 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