Thoreau’s Wildflowers Wilt In Warming Climate

For indispensable reporting on the coronavirus crisis, the election, and more, subscribe to the Mother Jones Daily newsletter.


800px-Walden_Pond_1.jpg

The plants and flowers that Henry David Thoreau lovingly inventoried around Walden Pond 156 years ago are disappearing due to climate change. Researchers from Harvard and Boston Universities have tracked how warming temperatures have shifted the flowering times of 473 plant species in the woods at Walden Pond and elsewhere in Concord. Orchids, dogwoods, lilies, and many sunflower relatives are declining more swiftly than other species.

Climate-induced loss of plant diversity in Concord is alarming—especially since 60% of the area has been protected or underdeveloped since Thoreau’s time. But rapid temperature changes have led to changes in the timing of seasonal activities. Since Thoreau’s time, species now flower an average of seven days earlier—bad news for those dependent on pollinators, like bees, who have not responded in kind, or who are suffering population declines as well. The species in decline include anemones, buttercups, asters, campanulas, bluets, bladderworts, dogwoods, lilies, mints, orchids, roses, saxifrages, and violets.

Sounds like a poem, doesn’t it? A poem falling silent. . . The mean temperature in the Concord area has risen 2.4 degrees Celsius over the past 100 years and is expected to climb between 1.1 and 6.4 degrees Celsius during the next 100 years. The paper is appearing in the Proceedings of the National Academies of Sciences.

Julia Whitty is Mother Jones’ environmental correspondent, lecturer, and 2008 winner of the Kiriyama Prize and the John Burroughs Medal Award.

DEMOCRACY DOES NOT EXIST...

without free and fair elections, a vigorous free press, and engaged citizens to reclaim power from those who abuse it.

In this election year unlike any other—against a backdrop of a pandemic, an economic crisis, racial reckoning, and so much daily crazy—Mother Jones' journalism is driven by one simple question: Will America will move closer to, or further from, justice and equity in the years to come?

If you're able to, please join us in this mission with a donation today. Our reporting right now is focused on voting rights and election security, corruption, disinformation, racial and gender equity, and the climate crisis. We can’t do it without the support of readers like you, and we need to give it everything we've got between now and November. Thank you.

DEMOCRACY DOES NOT EXIST...

without free and fair elections, a vigorous free press, and engaged citizens to reclaim power from those who abuse it.

In this election year unlike any other—against a backdrop of a pandemic, an economic crisis, racial reckoning, and so much daily crazy—Mother Jones' journalism is driven by one simple question: Will America will move closer to, or further from, justice and equity in the years to come?

If you're able to, please join us in this mission with a donation today. Our reporting right now is focused on voting rights and election security, corruption, disinformation, racial and gender equity, and the climate crisis. We can’t do it without the support of readers like you, and we need to give it everything we've got between now and November. Thank you.

We Recommend

Latest

Sign up for our newsletters

Subscribe and we'll send Mother Jones straight to your inbox.

Get our award-winning magazine

Save big on a full year of investigations, ideas, and insights.

Subscribe

Support our journalism

Help Mother Jones' reporters dig deep with a tax-deductible donation.

Donate