Drivers of soil organic carbon storage and vertical distribution in Eastern Australia

Hobley, Eleanor; Wilson, Brian; Wilkie, Arjan; Gray, Jonathan; Koen, Terry

doi:10.1007/s11104-015-2380-1

Cited by 228 publications

(158 citation statements)

References 40 publications

Supporting

Mentioning

136

Contrasting

Order By: Relevance

“…Drier conditions result in lower SOC levels ( Jenny, 1980;Lal, 2004;Badgery et al, 2013;Viscarra Rossel et al, 2014;Gray et al, 2015b;Hobley et al, 2015). The direction and magnitude of change at any location will be defined by the integrated effects across all processes involved in emission and consumption or storage of C (Baldock et al, 2012;Gottschalk et al, 2012).…”

Section: Broad Trends In Predicted Soc Changementioning

confidence: 99%

Change in Soil Organic Carbon Stocks under 12 Climate Change Projections over New South Wales, Australia

Gray

Bishop

2016

Soil Science Soc of Amer J

View full text Add to dashboard Cite

Digital soil mapping (DsM) techniques combined with space-for-time substitution (sFTs) processes were used to map and examine soil organic carbon (sOC) changes caused by projected climate change over New south Wales, Australia until ~2070. Twelve projections were derived from four global climate models downscaled with three regional climate models. A marked variation in the direction and magnitude of sOC change was demonstrated with the different projections. Mean state-wide predictions (0-30 cm depth) ranged between 2.9 Mg ha -1 gain and 8.7 Mg ha -1 sOC loss. Greater consistency among climate change projections is required before we can confidently predict sOC changes. By using averaged results from the 12 projections, broad trends were revealed for the change in sOC over two intervals (0-30 and 30-100 cm). A mean loss rate of 2.0 Mg ha -1 for the upper interval was demonstrated and a total loss of 737 Tg of CO 2 equivalent for the entire depth to 100 cm but the 95% confidence interval was wide. Although changes are primarily controlled by the balance between changing temperatures and rainfall, the extent of change also depends on the environmental regime, with differing changes demonstrated over 36 current climate-parent material-land use combinations (e.g., projected mean sOC decline is <1 Mg ha -1 for dryhighly siliceous-cropping but >15 Mg ha -1 for wet-mafic-native vegetation C limate change will impact on many aspects of the global environment and civilization generally, with changes in our soil resources being one important yet not widely understood consequence. Changes in key soil properties such as SOC content will influence agricultural productivity and our ability to feed and support the growing world population. Native ecosystems will be impacted, with modifications to species distribution and abundance at local, regional, and national scales. Changes in the potential of soils to sequester C or release it to the atmosphere are crucial for climate change modeling and mitigation strategies (Lal et al., 2007;Baldock et al., 2012).Although there has been widespread work on the relationship of climate to soils, dating back to the pioneering work of Dokuchaev in 1899 (Dokuchaev, 1967 transliteration) andJenny (1941) Core Ideas• Potential changes in soil organic C to 2070 mapped (100-m grid) and examined.• The direction and magnitude of change varied between the 12 climate projections.• Differing changes revealed for 36 current climate-parent material-land use regimes.• Digital soil mapping-space-for-time substitution is useful for climate change study

show abstract

Section: Broad Trends In Predicted Soc Changementioning

confidence: 99%

Change in Soil Organic Carbon Stocks under 12 Climate Change Projections over New South Wales, Australia

Gray

Bishop

2016

Soil Science Soc of Amer J

View full text Add to dashboard Cite

show abstract

“…Latty et al (2004) showed that even low severity disturbances left legacies on ecosystem processes that were detected nearly 100 years later, which does not seem to be the case in this study. Further, Hobley et al (2015) suggested that the storage of SOC near the surface was driven predominately by climate, while at depth the influence of climate waned and soil factors and disturbance history became more important. That has relevant implications in our study given that SOC stocks of the mineral horizons accounted for one third of the total SOC stocks in the mixed and alder forests and half of that for the coniferous forest.…”

Section: Disturbance Legacies On Soc Stocksmentioning

confidence: 99%

Disturbance Legacy on Soil Carbon Stocks and Stability within a Coastal Temperate Forest of Southwestern British Columbia, Canada

Defrenne¹,

Wilson²,

Simard³

et al. 2016

OJF

View full text Add to dashboard Cite

“…The key driver of SOC is widely reported to be climate, broadly comprising precipitation and temperature ( Jenny, 1980;Bui et al, 2009;Minasny et al, 2013;Viscarra-Rossel et al, 2014;Hobley et al, 2015). There is however less consistency in the literature regarding the relative influence attributed to other factors, such as those relating to land use/management (including agricultural intensity and vegetation cover levels), parent material (including lithology and clay content), and topography (including slope position and aspect).…”

mentioning

confidence: 99%

“…However, much uncertainty remains about how the factors controlling SOC levels vary in subsurface relative to surface soils (Rumpel and Kögel-Knabner, 2011;Hobley et al, 2015).…”

mentioning

confidence: 99%

Factors Controlling Soil Organic Carbon Stocks with Depth in Eastern Australia

Gray

Bishop

Wilson

2015

Soil Science Society of America Journal

121

View full text Add to dashboard Cite

PedologyUnderstanding the potential of soil to store soil organic carbon (SOC) is important for potential climate change mitigation strategies and assessing soil health issues. We examined the factors controlling SOC storage in eastern Australian soils and how these vary with depth. Models were developed using a set of readily interpreted covariates to represent key soil forming factors together with multiple linear regression (

show abstract

Drivers of soil organic carbon storage and vertical distribution in Eastern Australia

Cited by 228 publications

References 40 publications

Change in Soil Organic Carbon Stocks under 12 Climate Change Projections over New South Wales, Australia

Change in Soil Organic Carbon Stocks under 12 Climate Change Projections over New South Wales, Australia

Disturbance Legacy on Soil Carbon Stocks and Stability within a Coastal Temperate Forest of Southwestern British Columbia, Canada

Factors Controlling Soil Organic Carbon Stocks with Depth in Eastern Australia

Contact Info

Product

Resources

About