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Journal of the Australian Rangeland Society
RESEARCH ARTICLE (Open Access)

A systematic approach to soil carbon inventory on rangelands

Shawn W. Salley https://orcid.org/0000-0002-6092-0154 A * and Joel R. Brown B
+ Author Affiliations
- Author Affiliations

A USDA- National Soil Survey Center, Las Cruces, NM, USA.

B USDA- Southwest Climate Hub, Las Cruces, NM, USA.

* Correspondence to: Shawn.Salley@usda.gov

The Rangeland Journal 46, RJ24017 https://doi.org/10.1071/RJ24017
Submitted: 23 April 2024  Accepted: 7 July 2024  Published: 6 August 2024

© 2024 The Author(s) (or their employer(s)). Published by CSIRO Publishing on behalf of the Australian Rangeland Society. This is an open access article distributed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND)

Abstract

Significant and lasting soil carbon change in rangeland ecosystems requires ecological state change. Although within-ecological state, soil carbon dynamics can occur, they are driven primarily by short-term fluctuations in weather, specifically precipitation, and are insufficient to provide reliable estimates of change to support policy and management decisions. Changes in grazing management typically do not result in ecological state change, apart from the vegetation structural change associated with long-term overgrazing. Dominant vegetation attributes such as shrub-to-grass ratios, cool season versus warm season plant production, and annual versus perennial growth habit define ecological state and are detectable accurately and cost-effectively using existing remote-sensing technology. These vegetation attributes, along with stationary soil properties, allow for mapping at scales consistent with a variety of policy and management decisions and provide a logical basis for developing a credible sampling framework for verification. Furthermore, state-transition models of ecological state dynamics are designed to provide information that can be used to support inventories and management decisions for soil carbon and other ecosystem services.

Keywords: ecological restoration, ecological site, ecological state, ecosystem services, greenhouse gas management, livestock grazing management, nature accounting, rangeland soil carbon, resource inventories, shrub invasion, state transition model.

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