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4 - Carbon as a substrate for soil organisms

Published online by Cambridge University Press:  17 September 2009

By
D. W. Hopkins  and
E. G. Gregorich
Edited by
Richard Bardgett ,
Michael Usher  and
David Hopkins
D. W. Hopkins
Affiliation:
University of Stirling
E. G. Gregorich
Affiliation:
Agriculture and Agri-Food Canada
Richard Bardgett
Affiliation:
Lancaster University
Michael Usher
Affiliation:
University of Stirling
David Hopkins
Affiliation:
University of Stirling
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Summary

SUMMARY

  1. In many ecological studies, soil carbon is regarded as a barely differentiated whole with little attention paid to its underlying characteristics.

  2. Although it is widely appreciated that decomposer organisms are nearly infallible as degraders of organic molecules, there are marked differences in the utilisation of different components of organic matter by organisms depending on chemical and physical characteristics, location and availability in time in soil.

  3. We discuss the characteristics of soil carbon as a substrate and emphasise a ‘soil metabolomic’ approach for characterising the range of molecules in complex, composite substrates, and the potential that stable isotope probing offers for linking organisms to their substrates via enrichment of their biomolecules as they exploit isotopically enriched substrates.

  4. Using selected examples, we examine the influence of the chemical characteristics/quality, quantity, location and timing of supply of organic matter on the amount, activity and, where possible, the diversity of soil organisms.

  5. We are some way from unifying relationships between the quality, quantity, location and timing of delivery or availability of soil carbon on the size, activity and diversity of soil organisms. However, we point ways forward in which the information on the physics, chemistry and management are linked to the biology of soils.

Introduction

Currency of soil carbon

Humans view soil carbon in various physical (e.g. aggregates, density fractions), chemical (e.g. carbohydrates, aromatic compounds), biological (e.g. microbial biomass) and even economic (e.g. dollars per tonne or carbon credits) ways which are not usually ecological.

Type
Chapter
Information
Biological Diversity and Function in Soils , pp. 57 - 80
Publisher: Cambridge University Press
Print publication year: 2005

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References

Ågren, G. I. & Bossatta, E. (1996). Quality: a bridge between theory and experiment in soil organic matter experiments. Oikos, 76, 522–528CrossRefGoogle Scholar
Alphei, J., Bonkowski, M. & Scheu, S. (1996). Protozoa, Nematoda and Lumbricidae in the rhizosphere of Hordelymus europeaus (Poaceae): faunal interactions, response of microorganisms and effects on plant growth. Oecologia, 106, 111–126CrossRefGoogle ScholarPubMed
Anderson, T. H. (1994). Physiological analysis of microbial communities in soil: applications and limitations. Beyond the Biomass: Compositional and Functional Analysis of Soil Microbial Communities (Ed. by , K. Ritz, , J. Dighton & , K. E. Giller), pp. 67–76. Chichester: WileyGoogle Scholar
Arao, T. (1999). In situ detection of changes in soil bacterial and fungal activities by measuring 13C incorporation into soil phospholipid fatty acids from 13C acetate. Soil Biology and Biochemistry, 31, 1015–1020CrossRefGoogle Scholar
Arshad, M. A., Ripmeester, J. A. & Schnitzer, M. (1988). Attempts to improve solid-state 13C NMR spectra of whole mineral soils. Canadian Journal of Soil Science, 68, 593–602CrossRefGoogle Scholar
Baldock, J. A., Currie, G. J. & Oades, J. M. (1991). Organic matter as seen by solid state 13C NMR and pyrolysis tandem mass spectrometry. Advances in Soil Organic Matter Research: The Impact on Agriculture and the Environment (Ed. by , W. S. Wilson), pp. 45–60. Cambridge: Royal Society of ChemistryGoogle Scholar
Baldock, J. A. & Nelson, P. N. (2000). Soil organic matter. Handbook of Soil Science (Ed. by , M. E. Sumner), pp. B25–B84. Boca Raton, FL: CRC PressGoogle Scholar
Baldock, J. A., Oades, J. M., Vassallo, A. M. & Wilson, M. A. (1990). Solid-state CP/MAS 13C NMR analysis of bacterial and fungal cultures isolated from a soil incubated with glucose. Australian Journal of Soil Research, 28, 213–225CrossRefGoogle Scholar
Baldock, J. A. & Skjemstad, J. O. (2000). Role of the soil matrix and minerals in protecting natural organic materials against biological attack. Organic Geochemistry, 31, 697–710CrossRefGoogle Scholar
Bentham, H., Harris, J. A., Birch, P. & Short, K. C. (1992). Habitat classification and soil restoration assessment using analysis of soils microbiological and physico-chemical characteristics. Journal of Applied Ecology, 29, 711–718CrossRefGoogle Scholar
Beare, M. H., Parmlee, R. W., Hendrix, P. F., et al. (1992). Microbial and faunal interactions and effects on litter nitrogen and decomposition in agroecosystems. Ecological Monographs, 62, 569–591CrossRefGoogle Scholar
Bossatta, E. & Ågren, G. I. (1985). Theoretical analysis of decomposition of heterogeneous substrates. Soil Biology and Biochemistry, 17, 601–610CrossRefGoogle Scholar
Brady, N. C. & Weil, R. R. (1999). Nature and Properties of Soils. London: Prentice-HallGoogle Scholar
Briones, M. J. I., Mascato, R. & Mato, S. (1992). Relationships of earthworms with environmental factors studied by detrended canonical correspondence analysis. Acta Oecologia, 13, 617–626Google Scholar
Bruneau, P. M. C., Ostle, N., Davidson, D. A., Grieve, I. C. & Fallick, T. (2002). Determination of rhizosphere 13C pulse signals in soil thin sections by laser ablation isotope ratio mass spectrometry. Rapid Communications in Mass Spectrometry, 16, 2190–2194CrossRefGoogle ScholarPubMed
Bull, I. D., Parekh, N. R., Hall, G. H., Ineson, P. & Evershed, R. P. (2000). Detection and classification of atmospheric methane oxidizing bacteria in soil. Nature, 405, 175–178CrossRefGoogle ScholarPubMed
Bundt, M., Widmer, F., Pesaro, M., Zeyer, J. & Blaser, P. (2001). Preferential flow paths: biological ‘hot spots’ in soils. Soil Biology and Biochemistry, 33, 729–738CrossRefGoogle Scholar
Burdon, J. (2001). Are the traditional concepts of the structures of humic substances realistic? Soil Science, 166, 752–769CrossRefGoogle Scholar
Burkins, M. B., Virginia, R. A., Chamberlain, C. P. & Wall, D. H. (2000). Origin and distribution of soil organic matter in Taylor Valley, Antarctica. Ecology, 81, 2377–2391CrossRefGoogle Scholar
Campbell, C. A., Paul, E. A., Rennie, D. A. & McCallum, K. J. (1967). Applicability of the carbon-dating method of analysis to soil humus studies. Soil Science, 104, 217–224CrossRefGoogle Scholar
Chander, K. & Brookes, P. C. (1991). The effects of heavy metals from past applications of sewage-sludge on microbial biomass and organic matter accumulation in a sandy loam and a silty loam UK soil. Soil Biology and Biochemistry, 23, 927–932CrossRefGoogle Scholar
Chapman, S. J. & Gray, T. R. G. (1981). Endogenous metabolism and macromolecular composition of Arthrobacter globisformis. Soil Biology and Biochemistry, 13, 11–18CrossRefGoogle Scholar
Clapperton, M. J., Miller, J. J., Larney, F. J. & Lindwall, C. W. (1997). Earthworm populations as affected by long-term tillage practices in southern Alberta, Canada. Soil Biology and Biochemistry, 29, 631–633CrossRefGoogle Scholar
Clinton, P. W., Newman, R. H. & Allen, R. B. (1995). Immobilization of 15N in forest litter studied by 15N CP MAS NMR spectroscopy. European Journal of Soil Science, 46, 551–556CrossRefGoogle Scholar
Coûteaux, M.-M., Berg, B. & Rovira, P. (2005). Near infrared reflectance spectroscopy for determination of organic matter fractions including biomass in coniferous forest soils. Soil Biology and Biochemistry, 35, 1587–1600CrossRefGoogle Scholar
Coûteaux, M.-M., Bottner, P. & , B. Berg. (1995). Litter decomposition, climate and litter quality. Trends in Ecology and Evolution, 10, 63–66CrossRefGoogle Scholar
Nobili, M., Contin, M., Mondini, C. & Brookes, P. C. (2001). Soil microbial biomass is triggered into activity by trace amounts of substrate. Soil Biology and Biochemistry, 33, 1163–1170CrossRefGoogle Scholar
Del Rio, J. C. & Hatcher, P. G. (1998). Analysis of aliphatic biopolymers using thermochemolysis with tetramethylammonium hydroxide (TMAH) and gas chromatography mass spectrometry. Organic Geochemistry, 29, 1441–1451CrossRefGoogle Scholar
Fierer, N., Allen, A. S., Schimel, J. P. & Hoden, P. A. (2003a). Controls on microbial CO2 production: a comparison of surface and subsurface soil horizons. Global Change Biology, 9, 1–11CrossRefGoogle Scholar
Fierer, N., Schimel, J. P. & Hoden, P. A. (2003b). Variations in microbial community composition through two soil depth profiles. Soil Biology and Biochemistry, 35, 167–176CrossRefGoogle Scholar
Frostegård, A., Tunlid, A. & Bååth, E. (1996). Changes in microbial community structure during long-term incubation in two soils experimentally contaminated with metals. Soil Biology and Biochemistry, 28, 55–63CrossRefGoogle Scholar
Ghiorse, W. C. & Wilson, J. T. (1988). Microbial ecology of the terrestrial subsurface. Applied and Environmental Microbiology, 33, 107–173Google ScholarPubMed
Golchin, A., Baldock, M. A., Clarke, P., Higashi, T. & Oades, J. M. (1997). The effects of vegetation and burning on the chemical composition of soil organic matter in a volcanic ash soil. II. Density fractions. Geoderma, 76, 175–192CrossRefGoogle Scholar
Golchin, A., Oades, J. M., Skjemstad, J. O. & Clarke, P. J. (1994). Study of free and occluded particulate organic matter in soils by solid state 13C CP/MAS NMR spectroscopy and scanning electron microscopy. Australian Journal of Soil Research, 32, 285–309CrossRefGoogle Scholar
Gray, T. R. G. (1990). Soil bacteria. Soil Biology Guide (Ed. by , D. L. Dindal), pp. 15–31. New York: WileyGoogle Scholar
Greenfield, L. G. (2001). The origin and nature of organic nitrogen in soil as assessed by acidic and alkaline hydrolysis. European Journal of Soil Science, 52, 575–584CrossRefGoogle Scholar
Gregorich, E. G., Beare, M. H., Stoklas, U. & St-Georges, P. (2003). Biodegradability of soluble organic matter in maize-cropped soils. Geoderma, 113, 237–252CrossRefGoogle Scholar
Gregorich, E. G., Turchenek, L. W., Carter, M. R. & Angers, D. A. (eds) (2001). Soil and Environmental Science Dictionary. Boca Raton, FL: CRC PressGoogle Scholar
Grieve, I. C. (1984). Concentrations and annual loadings of dissolved organic matter in a small moorland stream. Freshwater Biology, 14, 533–537CrossRefGoogle Scholar
Grieve, I. C. (1990). Seasonal, hydrological and land management factors controlling dissolved organic carbon concentrations in the Loch Fleet catchment, SW Scotland. Hydrological Processes, 4, 231–239CrossRefGoogle Scholar
Grieve, I. C. & Marsden, R. L. (2001). Effects of forest cover and topographic factors on TOC and associated metals at various scales in western Scotland. Science of the Total Environment, 265, 143–151CrossRefGoogle ScholarPubMed
Guild, W. J. McL. (1952). Variation in earthworm numbers within field populations. Journal of Animal Ecology, 21, 169–183CrossRefGoogle Scholar
Haider, K. & Martin, J. P. (1975). Decomposition of specifically 14C labelled benzoic and cinnamic acid derivatives in soil. Soil Science Society of America Proceedings, 39, 657–662CrossRefGoogle Scholar
Harvey, R. W. & Widdowson, M. A. (1992). Microbial distributions, activities and movement in the terrestrial subsurface: experimental and theoretical studies. Interacting Processes in Soil Science (Ed. by , P. Baveye & , B. A. Stewart), pp. 185–225. Boca Raton, FL: LewisGoogle Scholar
Haslam, S. F. I., Chudek, J. A., Goldspink, C. R. & Hopkins, D. W. (1998). Organic carbon accumulation in a moorland soil chronosequence. Global Change Biology, 4, 305–313CrossRefGoogle Scholar
Hassink, J., Neutel, A. M. & Ruiter, P. (1994). C and N mineralization in sandy and loamy grassland soils: the role of microbes and microfauna. Soil Biology and Biochemistry, 26, 1565–1571CrossRefGoogle Scholar
Hendrix, P. F., Parmlee, R. W., , Crossley D. A. Jr, et al. (1986). Detritus food webs in conventional and no-tillage agroecosystems. BioScience, 36, 374–380CrossRefGoogle Scholar
Hodkinson, I. D., Webb, N. R. & Coulson, S. J. (2002). Primary community assembly on land: missing stages: Why are the heterotrophic organisms always there first?Journal of Ecology, 90, 569–577CrossRefGoogle Scholar
Holmes, F. L. (2002). Meselson, Stahl, and the Replication of DNA: A History of “The Most Beautiful Experiment in Biology”. New Haven, CT: Yale University PressGoogle Scholar
Hopkins, D. W., Chudek, J. A. & Shiel, R. S. (1993). Chemical characterization and decomposition of organic matter from two contrasting grassland soil profiles. Journal of Soil Science, 44, 147–157CrossRefGoogle Scholar
Hopkins, D. W., Chudek, J. A., Webster, E. A. & Barraclough, D. (1997). Following the decomposition of ryegrass labelled with 13C and 15N in soil by solid state nuclear magnetic spectroscopy. European Journal of Soil Science, 48, 623–631CrossRefGoogle Scholar
Hopkins, D. W., Macnaughton, S. J. & O'Donnell, A. G. (1991). A dispersion and differential centrifugation technique for representatively sampling microorganisms from soil. Soil Biology and Biochemistry, 23, 217–225CrossRefGoogle Scholar
Hopkins, D. W. & Shiel, R. S. (1991). Spectroscopic characterization of organic matter from soil with mull and mor humus forms. Advances in Soil Organic Matter Research: The Impact on Agriculture and the Environment (Ed. by , W. S. Wilson), pp. 71–90. Cambridge: Royal Society of ChemistryGoogle Scholar
Hopkins, D. W., Tilston, E. L., Webster, E. A., et al. (2004). Decay in soil of residues from plants with genetic modifications to lignin biosynthesis. Genetically Modified Crops: Ecological Dimensions (Ed. by , H. F. van Emben & , A. Gray). Cambridge: Cambridge University PressGoogle Scholar
Hopkins, D. W., Webster, E. A., Chudek, J. A. & Halpin, C. (2001). Decomposition in soil of tobacco plants with genetic modifications to lignin biosynthesis. Soil Biology and Biochemistry, 33, 1455–1462CrossRefGoogle Scholar
Intergovernmental Panel on Climate Change (IPCC) (2000). Land Use, Land Use Change, and Forestry. Cambridge: Cambridge University Press
Intergovernmental Panel on Climate Change (IPCC) (2001). Climate Change 2001: The Scientific Basis. Cambridge: Cambridge University Press
Jenkinson, D. S. & Ladd, J. N. (1981). Microbial biomass in soil: measurement and turnover. Soil Biochemistry, Vol. 5 (Ed. by , E. A. Paul & , J. N. Ladd), pp. 415–471. New York: Marcel DekkerGoogle Scholar
Jenkinson, D. S. & Rayner, J. H. (1977). The turnover of soil organic matter in some of the Rothamsted classical experiments. Soil Science, 123, 298–305CrossRefGoogle Scholar
Johnson, D., Leake, J. R., Ostle, N., Ineson, P. & Read, D. J. (2002). In situ13CO2 pulse-labelling of upland grassland demonstrates a rapid transfer pathway of carbon flux from arbuscular mycorrhizal mycelia to the soil. New Phytologist, 153, 327–334CrossRefGoogle Scholar
Jones, D. & Griffiths, E. (1964). The use of soil thin sections for the study of soil microorganisms. Plant and Soil, 20, 232–240CrossRefGoogle Scholar
Kalbitz, K., Schmetwitz, J., Schwesig, D. & Matzer, E. (2003). Biodegradation of soil-derived dissolved organic matter as related to its properties. Geoderma, 113, 273–291CrossRefGoogle Scholar
Killham, K., Amato, M. & Ladd, J. N. (1993). Effect of substrate location in soil and soil pore-water regime on carbon turnover. Soil Biology and Biochemistry, 25, 125–138CrossRefGoogle Scholar
Kinchesh, P., Powlson, D. S. & Randall, E. W. (1995). 13C NMR studies of soil organic matter in whole soils: I. Quantitation possibilities. European Journal of Soil Science, 46, 123–138Google Scholar
Kinner, N. E., Bunn, A. L., Meeher, L. D. & Harvey, R. W. (1990). Enumeration and variability in the distribution of protozoa in an organically contaminated subsurface environment. Transactions of the American Geophysical Union, 71, 1319–1320Google Scholar
Knicker, H. & Lüdemann, H.-D. (1995). N-15 and C-13 CPMAS and solution NMR studies of N-15 enriched plant material during 600 days of microbial degradation. Organic Geochemistry, 23, 119–126CrossRefGoogle Scholar
Kögel-Knabner, I. (2002). The macromolecular organic composition of plant and microbial residues as inputs to soil organic matter. Soil Biology and Biochemistry, 34, 139–162CrossRefGoogle Scholar
Kuhlbusch, T. A. J. (1998). Black carbon and the carbon cycle. Science, 280, 1903–1904CrossRefGoogle Scholar
Lavelle, P., Lattaud, C. & Trigo, D. (1994). Mutualism and biodiversity in soils. Plant and Soil, 170, 23–33CrossRefGoogle Scholar
Lawson, T., Hopkins, D. W., Chudek, J. A., Janaway, R. C. & Bell, M. G. (2000). Interactions of the soil organisms with materials buried for up to 33 years in the Wareham archaeological experimental earthwork. Journal of Archaeological Science, 27, 273–285CrossRefGoogle Scholar
Lehmann, J., Pereira da Silva, J., Steiner, C., et al. (2003). Nutrient availability and leaching in an archaeological Anthrosol and a Ferralsol of the Central Amazon basin: fertilizer, manure and charcoal amendments. Plant and Soil, 249, 343–357CrossRefGoogle Scholar
Mackie, A. E. & Wheatley, R. E. (1999). Effects and incidence of volatile organic compound interactions between fungal and bacterial isolates. Soil Biology and Biochemistry, 31, 375–385CrossRefGoogle Scholar
Malosso, E., English, L. C., Hopkins, D. W. & O'Donnell, A. G. (2004). Use of 13C-labelled plant materials and ergosterol and FAMEs to analyse organic matter decomposition in Antarctic soil. Soil Biology and Biochemistry, 36, 165–175CrossRefGoogle Scholar
Manefield, M., Whiteley, A. S., Griffiths, R. I. & Bailey, M. R. (2002). RNA stable isotope probing, a novel means of linking microbial community function to phylogeny. Applied and Environmental Microbiology, 68, 5367–5373CrossRefGoogle Scholar
Marschner, B. & Bredow, A. (2002). Temperature effects on release and ecologically relevant properties of dissolved organic carbon in sterilized and biologically active soil samples. Soil Biology and Biochemistry, 34, 459–466CrossRefGoogle Scholar
Marschner, B. & Kalbitz, K. (2003). Controls of bioavailability and biodegradability of dissolved organic matter in soils. Geoderma, 113, 211–235CrossRefGoogle Scholar
Marstorp, H. (1996a). Influence of soluble carbohydrates, free amino acids and protein content on the decomposition of Lolium multiflorum shoots. Biology and Fertility of Soils, 21, 257–263CrossRefGoogle Scholar
Marstorp, H. (1996b). Interactions in microbial uses of soluble plant components. Biology and Fertility of Soils, 22, 45–52CrossRefGoogle Scholar
Minderman, G. (1968). Addition, decomposition, and accumulation of organic matter in forests. Journal of Ecology, 56, 355–362CrossRefGoogle Scholar
Moorhead, D. L., Barrett, J. A., Virginia, R. A., Wall, D. H. & Porazinska, D. (2003). Organic matter and soil biota of upland wetlands in Taylor Valley, Antarctica. Polar Biology, 26, 567–576CrossRefGoogle Scholar
Mueller, G., Broll, G. & Tarnocai, C. (1999). Biological activity as influenced by microtopography in a cryosolic soil, Baffin Island, Canada. Permafrost and Periglacial Processes, 10, 279–2883.0.CO;2-A>CrossRefGoogle Scholar
Näsholm, T., Ekblad, A., Nordin, A., et al. (1998). Boreal forest plants take up organic nitrogen. Nature, 392, 914–916CrossRefGoogle Scholar
Niemeyer, J., Chen, Y. & Bollag, J.-M. (1992). Characterization of humic acids, composts, and peat by diffuse reflectance Fourier transform infrared spectroscopy. Soil Science Society of America Journal, 56, 135–140CrossRefGoogle Scholar
Nierop, K. G. P., Lagen, B. & Buurman, P. (2001). Composition of plant tissue and soil organic matter in the first stages of a vegetation succession. Geoderma, 100, 1–24CrossRefGoogle Scholar
Oades, J. M., Vassallo, A. M., Waters, A. G. & Wilson, M. A. (1987). Characterisation of organic matter in particle size and density fractions from a red-brown earth by solid-state 13C NMR. Australian Journal of Soil Research, 26, 287–299Google Scholar
Odum, E. P. (1969). The strategy of ecosystem development. Science, 164, 262–270CrossRefGoogle ScholarPubMed
Parkin, T. B. (1987). Soil microsites as a source of denitrification variability. Soil Science of America Journal, 51, 1194–1199CrossRefGoogle Scholar
Parton, W. J., Schimel, D. S., Cole, C. V. & Ojima, D. S. (1987). Analysis of factors controlling soil organic matter in Great Plains grasslands. Soil Science Society of America Proceedings, 53, 1173–1179CrossRefGoogle Scholar
Pilate, G., Guiney, E., Holt, K., et al. (2002). Field and pulping performances of transgenic trees with altered lignification. Nature Biotechnology, 20, 607–612CrossRefGoogle ScholarPubMed
Powlson, D. S., Brookes, P. C. & Christensen, B. T. (1987). Measurement of soil microbial biomass provides an early indication in changes in total organic matter due to straw incorporation. Soil Biology and Biochemistry, 19, 159–164CrossRefGoogle Scholar
Preston, C. M. (1996). Applications of NMR to soil organic matter analysis: history and prospects. Soil Science, 161, 144–166CrossRefGoogle Scholar
Schimel, D. S. (1995). Terrestrial ecosystems and the carbon cycle. Global Change Biology, 1, 77–91CrossRefGoogle Scholar
Schmidt, M. W. I., Skjemstad, J. O., Czimczik, C., et al. (2001). Comparative analysis of black carbon in soils. Global Biogeochemical Cycles, 15, 163–167CrossRefGoogle Scholar
Schmidt, M. W. I., Skjemstad, J. O. & Jäger, C. (2002). Carbon isotope geochemistry and nanomorphology of soil black carbon: black chernozemic soils in central Europe originate from ancient biomass. Global Biochemical Cycles, 16, 1123–1130CrossRefGoogle Scholar
Schnitzer, M. (1990). Selected methods for the characterization of soil humic substances. Humic Substances in Crop and Soil Sciences: Selected Readings (Ed. by , P. MacCarthy, , R. L. Malcolm, , C. E. Clapp & , P. R. Bloom), pp. 65–89. Madison, WI: Soil Science Society of AmericaGoogle Scholar
Schulten, H.-R. & Leinweber, P. (1996). Characterization of humic and soil particles by analytical pyrolysis and computer modelling. Journal of Analytical and Applied Pyrolysis, 38, 1–53CrossRefGoogle Scholar
Sinclair, J. T. & Ghiorse, W. C. (1989). Distribution of aerobic bacteria, protozoa, algae, and fungi in deep subsurface environments. Geomicrobiology Journal, 7, 15–31CrossRefGoogle Scholar
Skene, T. M., Skjemstad, J. O., Oades, J. M. & Clarke, P. J. (1997). The influence of inorganic matrices on the decomposition of Eucalyptus litter. Australian Journal of Soil Research, 35, 73–87CrossRefGoogle Scholar
Skjemstad, J. O., Clarke, P., Taylor, J. M., Oades, J. M. & Newman, R. H. (1994). The removal of magnetic materials from surface soils: a solid-state 13C CP/MAS study. Australian Journal of Soil Research, 32, 1215–1229CrossRefGoogle Scholar
Smith, R. L. & Duff, J. H. (1988). Denitrification in a sand and gravel aquifer. Applied and Environmental Microbiology, 54, 1071–1078Google Scholar
Stanier, R. Y. (1953). Adaptation, evolutionary and physiological: or Darwinism among the microorganisms. Adaptation in Microorganisms (Ed. by , R. Davies & , E. F. Gale), pp. 1–14. Cambridge: Society for General Microbiology 3rd Symposium/Cambridge University PressGoogle Scholar
Stetzenbach, L. D., Kelley, L. M. & Sinclair, N. A. (1986). Isolation, identification and growth of well-water bacteria. Ground Water, 24, 6–10CrossRefGoogle Scholar
Swift, M. J., Heal, O. W. & Anderson, J. M. (1979). Decomposition in Terrestrial Ecosystems. Oxford: Blackwell ScientificGoogle Scholar
Tate, K. R., Yamanoto, K., Churchman, G. J., Meinhold, R. & Newman, R. H. (1990). Relationships between the type and carbon chemistry of humic acids from New Zealand and Japanese soils. Soil Science and Plant Nutrition, 36, 611–621CrossRefGoogle Scholar
Tate III, R. L. (2001). Soil organic matter: evolving concepts. Soil Science, 166, 721–722CrossRefGoogle Scholar
Tenney, F. & Waksman, S. A. (1929). Composition of natural organic compounds and their decomposition in soil: IV. The nature and rapidity of decomposition of various organic complexes in different plants under aerobic conditions. Soil Science, 28, 55–84CrossRefGoogle Scholar
Tomlin, A. D. & Fox, C. A. (2003). Earthworms and agricultural systems: status of knowledge and research in Canada. Canadian Journal of Soil Science, 83, 265–278CrossRefGoogle Scholar
VandenBygaart, A. J., Gregorich, E. G. & Angers, D. A. (2003). Influence of agricultural management on soil organic carbon: a compendium and assessment of Canadian studies. Canadian Journal of Soil Science, 83, 363–380CrossRefGoogle Scholar
Wardle, D. A. (1992). A comparative assessment of the factors which influence microbial biomass carbon and nitrogen in soil. Biological Reviews, 67, 321–358CrossRefGoogle Scholar
Wardle, D. A. & Ghani, A. (1995). A critique of the microbial metabolic quotient (qCO2) as a bioindicator of disturbance and ecosystem development. Soil Biology and Biochemistry, 27, 1601–1610CrossRefGoogle Scholar
Wardle, D. A., Hörnberg, G., Zackrisson, O., Kalela-Brundin, M. & Coomes, D. A. (2003). Long-term effects of wildfire on ecosystem properties across an island area gradient. Science, 300, 972–975CrossRefGoogle ScholarPubMed
Webster, E. A., Chudek, J. A. & Hopkins, D. W. (1997). Fates of 13C from enriched glucose and glycine in an organic soil determined by NMR. Biology and Fertility of Soils, 25, 389–395CrossRefGoogle Scholar
Webster, E. A., Chudek, J. A. & Hopkins, D. W. (2000). Carbon transformations during decomposition of different components of plant leaves in soil. Soil Biology and Biochemistry, 32, 301–314CrossRefGoogle Scholar
Webster, E. A., Halpin, C., Chudek, J. A. & Hopkins, D. W. (2004). Decomposition in soil of soluble, insoluble and lignin-rich fractions of plant material from tobacco with genetic modifications to lignin biosynthesis. Soil Biology and Biochemistry, 37, 751–760CrossRefGoogle Scholar
Webster, E. A., Hopkins, D. W., Chudek, J. A., et al. (2001). The relationship between the size of the soil microbial community and the resource quality of soil organic matter. Journal of Environmental Quality, 30, 147–150CrossRefGoogle Scholar
Wilson, J. A., Demis, J., Pulford, I. D. & Thomas, S. (2001). Sorption of Cr(III) and Cr(VI) by natural (bone) charcoal. Environmental Geochemistry and Health, 23, 291–295CrossRefGoogle Scholar
Wilson, M. A. (1987). NMR Techniques and Applications in Geochemistry and Soil Chemistry. Oxford: Pergamon PressGoogle Scholar
Winogradsky, S. (1924). Sur la microflora autochthone de la terre arable. Compte Rendu Academie Science, Paris, 178, 1236–1239Google Scholar

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