FIG. 49.9 Plant responses to warming temperatures. Observations over a century and a half show that (a) the time of first flowering has become earlier as (b) regional temperatures have become warmer in the woods of Concord, Massachusetts. Source: Data from A. J. Miller-Rushing and R. B. Primack, 2008, “Global Warming and Flowering Times in Thoreau’s Concord: A Community Perspective,” Ecology 89(2):332–341, doi: 10.1890/07-0068.1.