Environmental Changes Are Fueling Human, Animal and Plant Diseases, Study Finds – Generic English
Connected media - Associated media
The loss of biodiversity played an especially large role in driving up disease risk, the researchers found. Many scientists have posited that biodiversity can protect against disease through a phenomenon known as the dilution effect. The theory holds that parasites and pathogens, which rely on having abundant hosts in order to survive, will evolve to favor species that are common, rather than those that are rare, Dr. Rohr said. And as biodiversity declines, rare species tend to disappear first. “That means that the species that remain are the competent ones, the ones that are really good at transmitting disease,” he said. Lyme disease is one oft-cited example. White-footed mice, which are the primary reservoir for the disease, have become more dominan...