Walden Pond (2010)/Photo/Wikipedia

Boston.com: The Concord woods have changed since naturalist Henry David Thoreau strolled among the trees around Walden Pond, jotting down careful observations of the plants there.

Drawing on Thoreau’s detailed notes from the mid-19th century, a team of local researchers has been looking for the imprint of climate change in New England. Now the team reports that invasive and nonnative plants in Concord are more adept than native species at responding to earlier spring thaws and warmer temperatures by changing when they flower. That means, the scientists conclude, that global warming may be advantageous to invasive and nonnative plants, with their ability to flower early possibly giving them an edge they need to thrive and spread.

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