Key part of article: Humans add even more complexity to the forecast. Cities and farms now block the path for many species that might otherwise be able to spread to more suitable habitats, for example. Dr. Parmesan thinks much more research should go into the interactions of global warming and other human impacts. Scientists in Australia have found that coral reefs are more resilient against global warming, for example, if they’re protected from overfishing. The warming oceans stimulate the growth of deadly algae on the reefs. But grazing fish can keep the algae in check.
Such research will become the basis for decisions about which species to help, and how. Dr. Mace believes that some especially vulnerable species may need to be moved to new habitats in order to survive. Dr. Parmesan thinks that reducing other pressures, like overfishing, will make species more resilient to climate change. “We know that climate change wouldn’t be such a big problem if systems weren’t already stressed,” Dr. Parmesan said. “We really need to focus on reducing these other stressors.”
Dr. Pearson, on the other hand, argues for setting aside more land in parks and reserves. More space will help keep species ranges large even if those ranges shift. “We need to give nature the opportunity to respond,” he said.
