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“Our findings revealed how the Amazon forest system could enter a phase of self-reinforced collapse sooner than previously thought.”Previous studies had not predicted a collapse of this scale could happen in the 21st century. “The Amazon forest is a major pump of moisture into the atmosphere, contributing to circulation processes that transfer moisture across the globe,” Flores said. Douglas Magno/AFP/Getty ImagesThe authors of the study noted that water stress was a common factor in the disturbances to the Amazon. Water stress occurs when there is not enough water to meet human or ecological needs. Global warming is intensifying the effects of water stress by causing the Amazonian climate to become drier and warmer.
Persons: , ” Bernardo Flores, , ” Flores, Douglas Magno, Richard Allan, Flores Organizations: CNN, Federal University of Santa, Paraguay —, South, Getty, Science, University of Reading Locations: Federal University of Santa Catarina, Brazil, South America, Bolivia, Paraguay, Plata, Labrea, Amazonas, AFP
Exercise or medication: Which is best for depression?
  + stars: | 2023-10-12 | by ( Kristen Rogers | ) edition.cnn.com   time to read: +7 min
What the research showsWhich treatment option works best partly depends on personal perceptions or preferences, including a person’s motivation to exercise or concern about potential side effects of a medication, experts said. For people with severe depression, exercise alone typically isn’t enough. Some experts also wonder which exercise is best for patients who benefit most from such physical activity, Schuch said. While exercise and medication are both viable options, it’s important to note that “none will work for all patients,” Schuch said. If you’re thinking of trying to alleviate depression with fitness, know “the time it takes for someone to experience relief from depression through exercise can vary widely,” Choi said.
Persons: , Brenda Penninx, Karmel Choi, Choi wasn’t, ” Choi, Felipe Barreto Schuch, Schuch wasn’t, Schuch, Ben Singh, wasn’t, Parco Siu, ” Singh, , ” Schuch Organizations: CNN, European College of, Disorders, Vrije University, Harvard Medical School, Federal University of Santa, University of South, University of Hong Locations: Amsterdam, Netherlands, Boston, Federal University of Santa Maria, Brazil, University of South Australia, University of Hong Kong
Birds With a Taste for Flesh Threaten Whale Calves
  + stars: | 2023-06-06 | by ( Annie Roth | ) www.nytimes.com   time to read: +1 min
Thousands of colossal southern right whales travel to the calm waters of Península Valdés off the coast of Argentina each year to breed and give birth. The cetaceans, which can reach 56 feet in length, are a sight to behold, especially with their calves in tow. For the past 50 years, the kelp gulls of Peninsula Valdés have been mercilessly pecking at any southern right whale that dares to swim to the surface to breathe. The birds gorge on skin and blubber ripped from the whales’ backs. Over the past few decades the problem has escalated, and is now so severe that it’s causing young southern right whale calves to die prematurely, according to a study published Wednesday in the journal Biology Letters.
Persons: Península Valdés, , , Macarena Agrelo Organizations: Federal University of Santa Locations: Península, Argentina, Federal University of Santa Catarina, Brazil
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