56°F
weather icon Partly Cloudy

Researchers study meadows’ effects on carbon emissions

Meadows in the Sierra Nevada mountains are critical components of watersheds. In addition to supplying water to more than 25 million people in California and Nevada, meadows contain large quantities of carbon below ground. While it has been known for some time that meadows have large quantities of soil carbon, whether meadow soils are gaining or losing carbon has remained unclear.

A new study led by researchers in the College of Agriculture, Biotechnology & Natural Resources at the University of Nevada, Reno, has demonstrated for the first time that meadows throughout the region are both gaining and losing carbon at high rates. Capture and storage of carbon in soil is a natural way to reduce carbon dioxide levels in the atmosphere and combat climate change. Human activities, however, can disrupt natural processes and lead to the loss of soil carbon to the atmosphere.

These results suggest that meadow management might either contribute to climate change or mitigate the harmful effects of increasing atmospheric carbon dioxide.

The research was conducted in partnership with the University of California Merced and numerous restoration practitioners and conservation organizations in more than a dozen meadows throughout the Sierra Nevada. The study is aimed at arming restoration practitioners with information to help make good management decisions.

“Meadows are known for their lush, diverse vegetation supported by soils that stay wet into the summer,” explained UNR doctoral candidate Cody Reed, who led the study. “However, a long history of human activity in many meadows throughout the Sierra Nevada has resulted in drier soils and the replacement of wetland vegetation with sparse grasses and shrubs.”

In research published this week in the scientific journal Ecosystems, Reed and her co-authors, including Associate Professors Benjamin Sullivan and Paul Verburg and Professor Emeritus Sherman Swanson from the university, revealed that meadows with wetland plant communities and dense root mats were large net carbon sinks during the year measured, meaning they removed carbon from the atmosphere. In fact, per acre, the amount of carbon captured in these meadows was similar to rates measured in tropical rain forests. On the other hand, meadows with more bare ground and plant communities associated with drier soil released large amounts of carbon from the soil to the atmosphere.

In the long-term, such changes to the large soil carbon stocks in meadows could add up. And unlike in forests, where most carbon is sequestered in wood above ground, the change in carbon in meadows is below ground. This means meadow soil carbon is less vulnerable to disturbances such as wildfire and may persist in the ecosystem for longer than above ground carbon. At the same time, soil carbon provides other important benefits besides taking carbon out of the atmosphere.

“Worldwide, soils may contain up to four times as much carbon as the atmosphere,” Reed explained. “Soil carbon in meadows also helps improve water quality and quantity, as well as soil fertility to support diverse plant communities important for wildlife and grazing.”

The research could help meadow restoration practitioners identify meadows in need of conservation to maintain soil carbon gains and meadows in need of restoration to prevent additional losses of soil carbon to the atmosphere. The researchers estimate that three acres of surrounding forest are required to offset the amount of carbon lost by one acre of degraded meadow. On the other hand, one acre of meadow may sequester as much carbon as six acres of forest.

“Our research shows meadows may be some of the best bang for the buck in terms of carbon management in the region,” Sullivan said. “My hope is that soil carbon sequestration can be integrated with other objectives to achieve management strategies that improve ecosystem functions in meadows.”

Sullivan said he and his colleagues in the college’s Department of Natural Resources & Environmental Science and Experiment Station plan to conduct future research to quantify the impacts of meadow restoration on soil carbon.

Don't miss the big stories. Like us on Facebook.
THE LATEST
A heartwarming Winter Bed Build

The Nye County Chapter of Sleep in Heavenly Peace hosted its very first Winter Community Bed Build last month and group members were not disappointed by the results.

GridLiance proposes transmission line upgrades

GridLiance is planning some major upgrades for its local transmission system and while these could certainly help support solar expansion, company officials stressed that the two proposed projects are in no way dependent upon such development.

NCSO: Two-vehicle collision claims life of Pahrump child

A Pahrump family is mourning the death of a child killed in a two-vehicle collision early Friday evening, Feb. 23. The crash occurred at the intersection of Highway 160 and Homestead Road just after 8 p.m.

Valley aquifer could reach “critical management” levels by 2055

After many months of painstaking research and calculations, a date has been placed on when the Pahrump Valley’s sole-source aquifer could reach critical management, with officials pegging the timeline at somewhere between the year 2055 and 2060. However, it was emphasized that this is an estimation and with so many variables at play, there is a possibility it could change.

How an injured and abandoned dog in Pahrump overcame the odds

A stray dog that was homeless, hospitalized and facing euthanasia earlier this month is now on the mend thanks to several in the community who helped raise thousands for its life-saving care.

Kellogg Park set for $70k expansion — here are the plans

The town of Pahrump is poised to purchase a parcel adjoining the lands dedicated to Kellogg Park, with a $70,000 offer for the 4.39 acre lot at 3781 E. Santovito St.

Guns, drugs, cash recovered in search could be part of crime ring, sheriff says

Officials from the U.S. Homeland Security Investigations Unit are assisting the Nye County Sheriff’s Office in the arrest and investigation of a man allegedly found possessing a hoard of guns, drugs and cash, according to Sheriff Joe McGill.

No same-day registration for Nye’s next live tax sale

Nye County is coming up on its next delinquent property tax sale and there is going to be a big change to the process — for the first time, there will be no same-day registration available.