Global study shows that plants are developing earlier in the spring in response to warmer temps
Many plants appear to be responding to global warming faster than anticipated by climate models, as trees leaf out and flower bloom on average about five to six days earlier for each degree (Celsius) of warming.
The observed response, based on results from 50 plant studies on four continents, is much greater than the changes induced under laboratory conditions. Changes in the timing of when plants develop has implications for entire ecoystems. There is already some evidence that the availability of food sources is out of synch with animals that depend on them.
“This suggests that predicted ecosystem changes — including continuing advances in the start of spring across much of the globe — may be far greater than current estimates based on data from experiments,” said Elizabeth Wolkovich, an ecologist at the University of British Columbia who led an interdisciplinary team of scientists that conducted the study while she was a postdoctoral fellow at the University of California, San Diego.