U.S. Agriculture Department researchers found that the amount of ground covered by the shrub Artemisia frigida rose 20- fold over 5 years on selected plots of land in
…The experiment incorporated a number of elements not found in nature, such as a sudden doubling of CO2 as opposed to a gradual one and the use of open-top chambers to enclose experimental plant patches. Even so, the results provide "a snapshot of what's going on in the wider world," Morgan said.
"It's happening in a number of these grasslands around the world: It's happening in North America, it's happening in Asia, in
…"The rate at which CO2 is increasing now is dramatic, and plants are certainly going to respond," the researcher said. "It's a certainty that ecosystems are changing as a response, and this is a case where it looks like the change involves a switch to a grassland that is going to be less desirable for ranchers and people who stock cattle."