Anthropocene:
“Imagine a world where flocks of birds block out the sun, millions of bison roam the Great Plains, and groupers are the size of those who catch them. For many contemporary people, such scenes seem impossible, as though they should be preceded by “once upon a time.” But they did happen, mere centuries or even decades ago. As generations of humans empty the world, their descendants are unable to see—and so find it hard to understand—how full it once was.
In 1995, fisheries scientist Daniel Pauly used the term “shifting baseline syndrome” to describe this phenomenon: each generation of fisheries scientists, he wrote, “accepts as a baseline the stock size and species composition that occurred at the beginning of their careers,” leading to “a gradual accommodation of the creeping disappearance” of species. Shifting baseline syndrome and its implications are now frequently invoked by people concerned about conservation, management, and environmental education.
But although it’s an intuitive concept, it’s difficult to study. For a recent paper in People and Nature, a group of researchers surveyed hundreds of UK residents about the populations of ten local bird species, and compared their knowledge with historic data. They also, for the first time, connected the survey-takers’ knowledge of past and present bird abundance with their opinions about conserving those birds. And while they found evidence that younger people are generally less adept at recognizing biological change than their elders are, they also found that knowledge of and personal experience with nature can help overcome that age gap. ”
