Nature’s engineers: How beavers alter ecology

Wildlife biologist Mike Fargione led a group hike across Cary’s campus, pointing out beaver dams and lodges along the way.

Photo By Nathan Miller

Nature’s engineers: How beavers alter ecology

AMENIA — Clear, sunny skies welcomed a group to the paved trails at the Cary Institute Saturday, Oct. 19, for an educational hike and lecture on beaver ecology led by wildlife biologist Mike Fargione.

The hike started at a small parking area on the north edge of the Cary campus, where Fargione presented a collection of beaver pelts to the group. He explained that beavers were almost totally eradicated from New England after fur traders hunted them to near-extinction in the 1600s. Until the 20th century, he said, beavers were absent from the New England landscape, a region that at one point hosted hundreds of millions of the semi-aquatic, dam-building rodents.

Now, as a result of careful mangement and reintroduction, Fargione said the beaver population has grown to about 2 million.
This brings challenges, but it also allows the landscape to return to the transitive nature it had prior to European settlement 400 years ago. Fargione said the modern, agricultural landscape that exists in Dutchess County is the result of human intervention and the removal of beavers. Before beavers were nearly eradicated, the rodents carefully redirected water, manipulating wetlands and low-lying forests and fields to create cyclical habitats. Human farmers responded by channelizing streams, drying swamps and driving out beavers to create more consistently dry farmlands.

Now, as beavers make their return, their incessant need to dam up streams and create beaver ponds is in direct conflict with human infrastructure.

Roads on Cary’s campus have started to show serious signs of damage from the beaver’s hydro-engineering. One path has been completely closed because erosion has created a sinkhole in the middle of the pavement. One group of beavers created a pond that was flooding the nearby New York State Police Troop K headquarters on Route 82. Fargione took the group by a low-lying brush pit to demonstrate the huge changes beavers can cause.

Before the beavers came in, the low-lying area was a dense forest full of alders, red maples and aspen trees, beavers’ preferred foods. Two streams came down the mountains from the south, feeding water into the low-lying area, and heavier-than-usual storms started to flood the patch. Noticing the new flooding and the tasty wood, beavers got to work damming up the edges of the patch, creating a 20 acre area of standing water five feet deep at its deepest point. In a matter of weeks the slightly-wet forest was transformed into a murky swamp, bringing different animals and vegetation. The day of the hike the pond was dry, but Fargione said the water didn’t just evaporate.

“A lot of that water goes back into the water table, recharging our aquifer,” Fargione said.

The habitats created by beavers are essential to local wildlife. “There’s lots of wildlife here just because beavers changed the ecology,” Fargione said.

Latest News

Participants at annual conference encouraged to ThinkDifferently by respecting evolving etiquette norms

Top row (left to right): Panelist Shadei Williams; Dana Hopkins, Dutchess County All Abilities Program Director; panelist Johnny Vacca; Dutchess County Executive Sue Serino. Bottom row: (left to right): Panelist Wayne Robinson; panelist Tracy Wallace; panelist Samantha Van Alstyne

Provided

HYDE PARK, N.Y. — On Thursday, Dec. 5, the annual ThinkDifferently conference was held at the Henry A. Wallace Visitor and Educational Center in Hyde Park, New York. The conference strived to enlighten participants on evolving protocols for addressing and collaborating with individuals with challenges.

Hosted by Dana Hopkins, program director of All Abilities at the Department of Behavioral and Community Health, ThinkDifferently is an initiative first launched in 2015 by former county executive Marc Molinaro with a goal to provide services to individuals with varying abilities and guidance for others such as businesses and communities to help create a more inclusive society.

Keep ReadingShow less
Shooting the breeze with Christopher Little

Martin Tandler

Little with his dog, Ruby.

"What I really feel lucky about is having had the chance to meet and photograph so many people who had a real impact on our lives,” said Christopher Little whose new memoir, “Shooting the Breeze: Memories of a Photojournalist” was just released. The book is as eclectic and colorful as the man himself and offers an intimate look into Little’s globe-trotting career spent behind the lens, capturing some of the most iconic figures, events, and human stories of the past half-century.

In 2021, the Dolph Briscoe Center for American History at The University of Texas acquired Little’s photographic archive.

Keep ReadingShow less
Cold Spring, a not-so-hidden Hudson Valley gem

“Cold Spring, NY” depicts life in a notable Hudson River town with a rich history and much natural beauty.

Krista A. Briggs

According to Alissa Malnati, co-creator of the new coffee table tome, “Cold Spring, NY”, after twenty-five years in the urban jungle, it was time to go in search of a cure for the angst which, for some, can come with metropolitan living. “My husband and I were soul sick,” explained Malnati of the couple’s move to Cold Spring, a Hudson River town located in leafy Putnam County. “We were seeking restoration and quiet, and to be in nature, away from the hustle and bustle of the city.”

The time was right for a move in 2021. The Malnatis relocated from busy Brooklyn to a tranquil mountaintop abode which allowed them to decompress without the intrusion of cell phones and ceaseless city noise. With the shift to the Hudson Valley, Alissa, a writer and fashion executive, and her husband, Will, a podcaster and television producer, found the peace they were searching for in Cold Spring, a semi-rural town known for its boutiques, antique shops, and world-class hiking trails.

Keep ReadingShow less