Soil Carbon Sequestration Accelerated by Restoration of Grassland Biodiversity

Overview

Journal Nat Commun

Specialty Biology

Date 2019 Feb 14

PMID 30755614

Citations 43

Authors

Yi Yang

David Tilman

George Furey

Clarence Lehman

Affiliations

Soon will be listed here.

Abstract

Agriculturally degraded and abandoned lands can remove atmospheric CO and sequester it as soil organic matter during natural succession. However, this process may be slow, requiring a century or longer to re-attain pre-agricultural soil carbon levels. Here, we find that restoration of late-successional grassland plant diversity leads to accelerating annual carbon storage rates that, by the second period (years 13-22), are 200% greater in our highest diversity treatment than during succession at this site, and 70% greater than in monocultures. The higher soil carbon storage rates of the second period (years 13-22) are associated with the greater aboveground production and root biomass of this period, and with the presence of multiple species, especially C4 grasses and legumes. Our results suggest that restoration of high plant diversity may greatly increase carbon capture and storage rates on degraded and abandoned agricultural lands.

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