caa a22 4500 606218831 CHVBK 20210128101115.0 cr unu---uuuuu 210128e20150501xx s 000 0 eng 10.1007/s11104-015-2380-1 doi (NATIONALLICENCE)springer-10.1007/s11104-015-2380-1 Drivers of soil organic carbon storage and vertical distribution in Eastern Australia [Elektronische Daten] [Eleanor Hobley, Brian Wilson, Arjan Wilkie, Jonathan Gray, Terry Koen] Aims: Drivers of soil organic carbon (SOC) storage are likely to vary in importance in different regions and at different depths due to local factors influencing SOC dynamics. This paper explores the factors influencing SOC to a depth of 30cm in eastern Australia. Methods: We used a machine learning approach to identify the key drivers of SOC storage and vertical distribution at 1401 sites from New South Wales, Australia. We then assessed the influence of the identified factors using traditional statistical approaches. Results: Precipitation was important to and positively associated with SOC content, whereas temperature was important to and negatively associated with SOC vertical distribution. The importance of geology to SOC content increased with increasing soil depth. Land-use was important to both SOC content and its vertical distribution. Conclusion: We attribute these results to the influence of precipitation on primary production controlling SOC content, and the stronger influence of temperature on microbial activity affecting SOC degradation and vertical distribution. Geology affects SOC retention below the surface. Land-use controls SOC via production, removal and vertical mixing. The factors driving SOC storage are not identical to those driving SOC vertical distribution. Changes to these drivers will have differential effects on SOC storage and depth distribution. Springer International Publishing Switzerland, 2015 Machine learning nationallicence Vertical distribution nationallicence Land-use nationallicence Climate nationallicence Geology nationallicence Hobley Eleanor University of New England, 2351, Armidale, NSW, Australia aut Wilson Brian University of New England, 2351, Armidale, NSW, Australia aut Wilkie Arjan University of New England, 2351, Armidale, NSW, Australia aut Gray Jonathan NSW Office of Environment and Heritage, 2124, Parramatta, NSW, Australia aut Koen Terry NSW Office of Environment and Heritage, 2794, Cowra, NSW, Australia aut Plant and Soil Springer International Publishing 390/1-2(2015-05-01), 111-127 0032-079X 390:1-2<111 2015 390 11104 https://doi.org/10.1007/s11104-015-2380-1 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/s11104-015-2380-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hobley Eleanor University of New England, 2351, Armidale, NSW, Australia aut NATIONALLICENCE 700 1- Wilson Brian University of New England, 2351, Armidale, NSW, Australia aut NATIONALLICENCE 700 1- Wilkie Arjan University of New England, 2351, Armidale, NSW, Australia aut NATIONALLICENCE 700 1- Gray Jonathan NSW Office of Environment and Heritage, 2124, Parramatta, NSW, Australia aut NATIONALLICENCE 700 1- Koen Terry NSW Office of Environment and Heritage, 2794, Cowra, NSW, Australia aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 390/1-2(2015-05-01), 111-127 0032-079X 390:1-2<111 2015 390 11104