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#1 11-07-2018 05:11:05

Date d'inscription: 04-07-2018
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Police officials in Ferguson

CHICAGO James Van Riemsdyk Black Jersey , Sept. 7 (Xinhua) -- Changing climate on the Earth may cause extinction of up to one-third of parasite species by 2070, according to a new study published in the journal Science Advances on September 6.

The diverse group of organisms or parasites includes tapeworms, roundworms, ticks Nikita Zaitsev Black Jersey , lice, fleas and other pests. Parasites have a bad reputation for causing disease in humans, livestock and other animals. But parasites play important roles in ecosystems, and parasite loss could dramatically disrupt ecosystems.

To find out how climate change is likely to affect the survival of a wide range of parasite species Patrick Marleau Black Jersey , researchers turned to museum collections. The U.S. National Parasite Collection, containing millions of organisms, provides a broad and deep record of different species' occurrences around the world. Most species are represented by many specimens, meaning researchers can use the museum's records to investigate organisms' geographical distributions and predict changes over time.

Records from the U.S. National Parasite Collection were combined with additional information from specialized databases cataloging ticks Zach Hyman Black Jersey , fleas, feather mites and bee mites to enable a comprehensive global analysis.

Then a team including 17 researchers in eight countries spent years tracking down the exact geographical source of tens of thousands of parasite specimens, adding GPS coordinates to their database wherever possible.

Using climate forecasts, the researchers compared how 457 parasite species will be impacted by changes in climate under various scenarios.

The analysis determined that parasites are even more threatened than the animal hosts they rely on. The most catastrophic model predicted that more than a third of parasite species worldwide could be lost by 2070. The most optimistic models predicted a loss of about 10 percent.

"(Slowing climate change) has a really profound impact on extinction rates Ron Hainsey Black Jersey , "said study lead author Colin Carlson, a graduate student in Wayne Getz's laboratory at the University of California, Berkeley.

"Parasites are definitely going to face major extinction risk in the next 50 years," Carlson said. "They are certainly as threatened as any other animal group."

"Climate change has the capacity to alter nearly every dimension of biodiversity Authentic Jake Gardiner Jersey ," said Nyeema Harris, an assistant professor in the Department of Ecology and Evolutionary Biology of the University of Michigan (UM).

It is the consensus of the researchers that parasites need to be included in conversations about conservation, given their delicate position in complex ecosystems as the study shows.

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CHICAGO Authentic Morgan Rielly Jersey , Nov. 17 (Xinhua) -- Missouri Governor Jay Nixon Monday declared a state of emergency in the greater St. Louis area and activated the National Guard.

Nixon said the National Guard would assist state and local police in the event of unrest and violence in the greater St. Louis area following the decision of the grand jury investigating the death of Michael Brown.

Under the governor's executive order, the St. Louis County Police Department will assume control of the unified command, which includes the St. Louis Metropolitan Police Department and Missouri State Highway Patrol, local media reported.

St. Louis Mayor Francis Slay said at a news conference Monday that he did not know how many guardsmen would be deployed in the city. Nevertheless Authentic Tyler Bozak Jersey , the National Guard will not be posted on the front lines in dealing with protesters or activists, it is best suited for a secondary role, said Slay.

Nixon's executive order will expire in 30 days.

Most people take Nixon' s declaration of state of emergency as a sign that the Grand Jury' s decision on whether to indict the white police officer over the fatal shooting of unarmed 18-year-old Michael Brown will come soon. Brown was shot and killed by Officer Darren Wilson on Aug. 9.

Witnesses and police have conflicting accounts of Brown' s death. Police said Brown struggled with Officer Darren Wilson inside his police car and reached for Wilson' s weapon, while Brown' s family and some witnesses said Wilson killed Brown as he raised his hands in surrender.

Police officials in Ferguson as well as in other cities across the United States Monday are preparing for possible violence in the wake of the decision.

Local media reported that police officials in Los Angeles Authentic Frederik Andersen Jersey , rocked by riots in 1992 after the acquittal of police officers in the beating of Rodney King, have been in touch with their counterparts in Missouri.

Police departments in big cities in the U.S. said they're well-equipped to handle crowds.

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