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Oblique marine stars that are endangered by diseases along the West Bank



Thousands of sunflower sea stars float Croker Rock near Crocker Island, left, located in the Indian Missile Fjord, north of Vancouver, British Columbia, on October 9, Three weeks later, in the true photography, the stars of the sea disappeared.
Thousands of sunflower sea stars float Croker Rock near Crocker Island, left, located in the Indian Missile Fjord, north of Vancouver, British Columbia, on October 9, Three weeks later, in the true photography, the stars of the sea disappeared.

According to a new study conducted by Cornell University in collaboration with the University of California, Davis suggests that the combination of sea-warming and infectious disease spending has destroyed the population of huge sunflower sea stars that were once rich along the West Coast of North America.

Since 2013, a marine star of a breakthrough disease has achieved tremendous mortality among numerous ocean stars from Mexico to Alaska. The east coast was not immune because the disease affected the shores of New Jersey in New England.

Dr Harvell, Professor Cornel of Ecology and Evolutionary Biology, co-author, said: "In a period of time abound in marine waters, sunflower sea stars can not currently be found off the coast of California and are rare in Alaska. the stars have remained so low in the last three years, we think they are endangered in the southern part of their range, and we do not have data for northern Alaska. "

"Global warming due to a change in the atmosphere is likely to be a major factor. The heat wave in the oceans – a product with increased atmospheric temperatures – exacerbates the starving starvation disease. It is a deadly disease, and when it adds a higher temperature for it, it kills faster, causing greater impact ".

"Fisheries depend on the shores of the sea shores to form a healthy environment for fish and the wider ocean ecosystem. With the disintegration of sunflower starfish, populations of sea urchins in some areas have exploded, significantly reduced algae."

Diego Montesino-Lateror, a wildlife epidemiologist with Davis Davis, a medical institute and co-lead author, said: "A sunflower starfish continues to decline even in the deepest ocean and does not recover in the same way as you experience the interdental star."

"This is probably because this disease has many hosts, and other strains that better tolerate the pathogen can transmit it to the sunflower star."

Joseph Haidos, senior author of the USC Davis program and director of the Moradok Society, said: "In California, Washington and parts of British Columbia, sunflower sea stars control their urchins. Without sunflower stars, uchkin populations expand and threatens forests and biodiversity. This cascading effect has a really big impact. "

Between 2006 and 2017, scientists and trained scientists in the area of ​​the Reef Education Environment (REEF) ran 10,956 meandering commentators from Southern California to Alaska. Before 2013, sweaters discovered a wealth of sea stars, between 2013 and 2017, the population collapsed.

Researchers at Simon Fraser University and the Hakai Institute confirmed the crash from the remote Isle of Calvert in British Columbia. The warming of oceans registered at REEF's locations relates to the expansion of water temperature to 4 degrees Celsius that began in 2014.

Scientists from the NOAA reviewed sunflower seafood in a huge number of deep stripes from Mexico to the Canadian edge and recorded a 100 percent reduction in all countries in deep water to 1,000 meters.

For this study, "The Epidemic of Disease and the Marine Wave is associated with the continental collapse of the key predator (Pycnopodia Helianthoides)," the other partner institutions were Simon Frieser University, Stanford University, the Hakai Institute and the National Oceanic and Atmospheric Administration (NOAA).

The study was published in the journal Science Advances.


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