NEW YORK – Most people assume that a warmer planet will be a buggier, more parasite- and disease-ridden place. There are plenty of examples to justify this fear. Read more at straitstimes.com.
NEW YORK – Most people assume that a warmer planet will be a buggier, more parasite- and disease-ridden place. There are plenty of examples to justify this fear.
“It is the kind of decline that triggers conservation action for mammals and birds, and that gets people riled,” said Dr Chelsea Wood, a parasite ecologist at the University of Washington and an author of the study. As scientists learn more about the hundreds of thousands of other parasitic species that do not harm humans, a picture of animal groups that play key roles in maintaining healthy ecosystems is emerging. For instance, parasites keep species populations in check, just like predators do.
Until now, scientists were mostly left to guess how climate change and other anthropogenic pressures were affecting parasites. To answer this question, Dr Wood and her colleagues turned to 699 fish specimens, most of which were kept in the basement of the Burke Museum of Natural History and Culture in Seattle. The fish, which were collected between 1880 and 2019 in Puget Sound of Washington state, were “parasite time capsules”, Dr Wood said.
Controlling for other factors like pollution and fluctuating fish populations, the team found that across all species, parasites declined by 38 per cent for every degree Celsius of temperature increase. Dr Kevin Lafferty, a disease ecologist at the United States Geological Survey, who also was not involved in the research, said it makes sense that parasites with complex life cycles are “the first to go”, because they have evolved to exploit complex ecosystems.
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