Troubling toll in Thoreau's backyard

Scientists say species drop amid warming

Some species have adapted to climate changes by flowering early and have thus remained relatively common, such as the harlequin blueflag, above. (Abraham Miller-Rushing)

By Billy Baker

Globe Correspondent / October 28, 2008

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In the 1850s, a few years after he had gone to "live deliberately" in a cabin in the woods at Walden Pond, Henry David Thoreau began to compile detailed records on hundreds of species of plants in his beloved Concord. Those same data now are being used to measure the effect of climate change, and the news is not good, ... (Full article: 768 words)