Displaying items by tag: cedar barren

A volunteer removes invasive plants from an Oak Ridge cedar barren as part of a Tennessee Citizens for Wilderness Planning effort to keep the barren in its natural prarie state.  Anna Lawrence/Hellbender Press

Volunteers play the part of fire to maintain the native grasses and wildflowers at an Oak Ridge cedar barren

OAK RIDGE — It’s called a barren, but it’s not barren at all. It’s actually a natural Tennessee prairie, full of intricate, interlocking natural parts, from rocks and soil to plants and insects and animals.

There’s lots of life in these small remaining unique collections of grasses and conifers that are typically known, semi-colloquially, as cedar barrens. 

Many of these “barrens” have been buried beneath illegal dumping or asphalt, but remnants they are still tucked away here and there, including a small barren in Oak Ridge owned by the city and recognized by the state as a small natural area.

The seven-acre cluster of cedars, large hardwoods and small open patches of native grasses such as long stem, blue stem and Indian grass, used to be much larger. A large portion of the original barren now lies beneath medical facilities, commercial development and a community college campus in the area of Fairbanks Road and Briarcliff Avenue.

These unique ecosystems need fire to thrive, and modern firefighting practices, road building and development have stopped this semi-regular natural cleanse of woody plants, shrubs and natural and exotic invasives, which encroach upon and can ultimately overcome the natural plants in these vanishingly rare grasslands.

In many instances, humans have replaced fire to ensure these special places don’t disappear. 

That’s why three dozen people showed up on a chilly but sunny Saturday in early March to strip shrubs, saplings and even larger trees from the small but classic barren adjacent to Jefferson Middle School. The goal: Help its small grassland expand and avoid terminal encroachment from incompatible vegetation.

Cedars take well to the shallow, rocky soil that is characteristic of these communities, but the most important features of these vanishing places are native prairie grasses and accompanying rare plants and wildflowers and their associated insect and animal species.

“We are doing what nature used to do with the occasional wildfire,” said Tim Bigelow, a board member of Tennessee Citizens for Wilderness Planning, which organizes the barren weed wrangles several times a year.

Natural and intentional low-intensity ground fires historically nurtured such landscapes, eliminating woody plants and ensuring there was enough open space and sunlight for the associated grasses and flowers to thrive in a prairie environment. 

And yes, there are prairies in Tennessee. Historically, most of these barrens were on or near the Cumberland Plateau or along the Kentucky

Cedar Barrens — a habitat characteristic of our ecoregion — have become scarce in East Tennessee. They are reduced or eliminated by economic development and our rare native species specialized to live in them get overwhelmed by invasives. 

For more information, contact Tim Bigelow at 865-607-6781 or This email address is being protected from spambots. You need JavaScript enabled to view it.

Specifics subject to prevailing conditions at time of event. COVID-19 precautions will be observed. 

 

A life dedicated to the flora of Tennessee

Dr. Hal DeSelm clambered around the crest of Cherokee Bluff in the heat of a late Knoxville summer 22 years ago. The Tennessee River flowed languidly some 500 feet below. Beyond the river stood the campus of the University of Tennessee Agriculture Institute. The towers of the city center rose to the northeast beyond the bridges of the old frontier river town.

DeSelm was not interested in the views of the urban landscape below. He was interested in the native trees, shrubs, herbs and grasses that clung to the ancient cliffside with firm but ultimately ephemeral grips on the craggy soil.

The retired UT professor, a renowned ecologist and botanist who died in 2011, had been sampling the terrestrial flora of Tennessee for decades. The life-long project took on a new urgency in the early 1990s, when he accelerated his data collection in hopes of writing the authoritative guide to the natural vegetation native to the forests, barrens, bogs and prairies of pre-European Tennessee.

Between 1993 and 2002, DeSelm collected 4,184 data points from 3,657 plots across the state. Many of those plots have since been lost to development, highways, and agriculture, or overrun by exotic species, but he assembled an invaluable baseline of the native landscape. Many of the sites he recorded have since been lost to development.