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Oxidative ratio (OR) of Southern African soils and vegetation: Updating the global OR estimate

Clay, Gareth D; Worrall, Fred

Catena. 2015;126:126-133.

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Abstract

Oxidative ratio (OR) is the ratio of moles O2 released per mole CO2 sequestered through photosynthesis in the terrestrial biosphere. The lower the OR value the more CO2 an environment can potentially sequester. It is this property of the organic matter that plays a role in models of CO2 partitioning between the atmosphere and the biosphere. Recent studies have shown that the accepted value of OR (1.1 ± 0.05) may not be appropriate but that there are a number of research gaps before a full account of global OR values can be carried out. This study aims to fill some of the research gaps by carrying out a targeted sampling campaign in southern Africa. Vegetation, litter and soil samples were taken from a range of soil orders and biomes across a series of locations in South Africa and Swaziland. From these samples this study has been able to update a recent meta-analysis and show that although there were significant differences between some sites and vegetation types, there was no significant difference between the soil orders or biomes sampled. This study has also been able to update the global ORterra estimate to 1.06 ± 0.06.

Bibliographic metadata

Type of resource:
Content type:
Publication status:
Published
Publication type:
Publication form:
Published date:
Language:
eng
Journal title:
ISSN:
Publisher:
Volume:
126
Start page:
126
End page:
133
Total:
7
Pagination:
126-133
Digital Object Identifier:
10.1016/j.catena.2014.10.029
Research data access statement included:
Not applicable
Attached files embargo period:
Immediate release
Attached files release date:
25th November, 2014
Access state:
Active

Institutional metadata

University researcher(s):

Record metadata

Manchester eScholar ID:
uk-ac-man-scw:240854
Created by:
Clay, Gareth
Created:
25th November, 2014, 14:56:48
Last modified by:
Clay, Gareth
Last modified:
17th November, 2015, 08:07:32

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