caa a22 4500 605516618 CHVBK 20210128100715.0 cr unu---uuuuu 210128e20150501xx s 000 0 eng 10.1007/s10533-015-0093-4 doi (NATIONALLICENCE)springer-10.1007/s10533-015-0093-4 Subtropical giant podzol chronosequence reveals that soil carbon stabilisation is not governed by litter quality [Elektronische Daten] [Andrew Jones, Jonathan Sanderman, Diane Allen, Ram Dalal, Susanne Schmidt] The magnitude of the carbon flux between soil and atmosphere has prompted efforts to better understand the controls over the fate of carbon in plant litter that re-enters the atmosphere as carbon dioxide or is sequestered as soil organic carbon (SOC). It remains unresolved if the long-term fate of litter carbon is driven by biochemical properties of litter or by soil properties that reduce the ability of soil organisms to decompose litter-derived carbon. The prominent role that reactive soil minerals play in stabilising SOC have hindered investigation into the single role of litter quality on long-term SOC stability. Here we investigated the independent effects of litter quality on soil carbon stabilisation across a 460,000year sand dune chronosequence characterised by a pronounced nutrient and litter quality gradient with minimum presence of interfering soil minerals. Using a steady state turnover model to interpret radiocarbon activity in soils collected≈40years apart, we show that the turnover time of SOC in the A horizon averaged 22years (ranging from 16 to 27years) across the chronosequence. This finding strongly contrasts other chronosequences where SOC turnover rates range from 60 to 726years in concert with changing abundance and composition of soil minerals. Our study demonstrates that the long-term stability of SOC in surface horizons may be largely determined by interaction with soil minerals and that litter quality per se does not govern carbon stabilisation. Springer International Publishing Switzerland, 2015 Soil carbon nationallicence Turnover nationallicence Litter quality nationallicence Chronosequence nationallicence Soil nutrients nationallicence Radiocarbon nationallicence Jones Andrew School of Agriculture and Food Sciences, The University of Queensland, 4072, St Lucia, QLD, Australia aut Sanderman Jonathan CSIRO Agriculture Flagship, Waite Campus, 5064, Urrbrae, SA, Australia aut Allen Diane School of Agriculture and Food Sciences, The University of Queensland, 4072, St Lucia, QLD, Australia aut Dalal Ram School of Agriculture and Food Sciences, The University of Queensland, 4072, St Lucia, QLD, Australia aut Schmidt Susanne School of Agriculture and Food Sciences, The University of Queensland, 4072, St Lucia, QLD, Australia aut Biogeochemistry Springer International Publishing 124/1-3(2015-05-01), 205-217 0168-2563 124:1-3<205 2015 124 10533 https://doi.org/10.1007/s10533-015-0093-4 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10533-015-0093-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jones Andrew School of Agriculture and Food Sciences, The University of Queensland, 4072, St Lucia, QLD, Australia aut NATIONALLICENCE 700 1- Sanderman Jonathan CSIRO Agriculture Flagship, Waite Campus, 5064, Urrbrae, SA, Australia aut NATIONALLICENCE 700 1- Allen Diane School of Agriculture and Food Sciences, The University of Queensland, 4072, St Lucia, QLD, Australia aut NATIONALLICENCE 700 1- Dalal Ram School of Agriculture and Food Sciences, The University of Queensland, 4072, St Lucia, QLD, Australia aut NATIONALLICENCE 700 1- Schmidt Susanne School of Agriculture and Food Sciences, The University of Queensland, 4072, St Lucia, QLD, Australia aut NATIONALLICENCE 773 0- Biogeochemistry Springer International Publishing 124/1-3(2015-05-01), 205-217 0168-2563 124:1-3<205 2015 124 10533