Study Shows Climate Change Impacts On Plant Life

Scientific American:

They said plants had been the focus of study because their response to climate change could affect food chains and ecosystem services such as pollination, nutrient cycles and water supply.
The study, published on the Nature website, draws on evidence from plant life cycle studies and experiments across four continents and 1,634 species. It found that some experiments had underestimated the speed of flowering by 8.5 times and growing leaves by 4 times.
"Across all species, the experiments under-predicted the magnitude of the advance - for both leafing and flowering - that results from temperature increases," the study said.
The design of future experiments may need to be improved to better predict how plants will react to climate change, it said.
Plants are essential to life on Earth. They are the base of the food chain, using photosynthesis to produce sugar from carbon dioxide and water. They expel oxygen which is needed by nearly every organism which inhabits the planet.
Scientists estimate the world's average temperature has risen by about 0.8 degrees Celsius since 1900, and nearly 0.2 degrees per decade since 1979.

We're really rolling into this thing blind.  I hope the scientists are overly pessimistic, but I fear they are overly optimistic.