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Invertebrates as determinants and indicators of soil quality

Published online by Cambridge University Press:  30 October 2009

Nigel E. Stork  and
Paul Eggleton
Nigel E. Stork
Affiliation:
Biodiversity Division, Department of Entomology, The Natural History Museum, London SW7 5BD, United Kingdom.
Paul Eggleton
Affiliation:
Biodiversity Division, Department of Entomology, The Natural History Museum, London SW7 5BD, United Kingdom.
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Abstract

Invertebrates are an integral part of soils and are important in determining the suitability of soils for the sustainable production of healthy crops or trees. We discuss the importance of the soil invertebrate fauna in relation to terrestrial habitats and global biodiversity as we understand it. We describe the role of the main invertebrate groups in soils, including earthworms, termites, springtails, and nematodes, and how they determine soil quality. Practical problems in dealing with the invertebrate fauna include sampling, taxonomy and availability of biological information on species. Various measures are available that use invertebrates to assess soil quality, each with its advantages and disadvantages. They include abundance, biomass, density, species richness, trophic/guild structure, food web structure, keystone species and ecosystem engineers. We propose the three most useful and practical of these as suitable to be combined with other biological (microbial) and non-biological (hydrological, physical, chemical) criteria into a single index of soil quality that might be used on a regional, if not international basis.

Keywords

biodiversitysoil invertebratesspecies richnesskeystone speciesearthwormsspringtailsnematodestermites
Type
Articles
Information
American Journal of Alternative Agriculture , Volume 7 , Issue 1-2: Special Issue on Soil Quality , June 1992 , pp. 38 - 47
Copyright
Copyright © Cambridge University Press 1992

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References

1.Abdel-Galil, F.A., and Darwish, Y.A.. 1987. Soil fauna of Zizyphus fruit trees in Assiut area. Assiut J. Agricultural Sciences 18:61–72.Google Scholar
2.Abe, T., and Watanabe, H.. 1983. Soil macrofauna in a subtropical forest and its adjacent cassava plantation in Okinawa—with special reference to the activities of termites. Physiology and Ecology, Japan 20:101–114.Google Scholar
3.Abrahamsen, G. 1990. Influence of Cognettia sphagnetorum on nitrogen mineralisation in homogenised mor humus. Biology and Fertility of Soils 9:159–162.CrossRefGoogle Scholar
4.Adis, J. 1987. Extraction of arthropods from Neotropical soils with a modified Kempson apparatus. J. Tropical Ecology 3:131–138.CrossRefGoogle Scholar
5.Adis, J. 1988. On the abundance and density of terrestrial arthropods in Central Amazonian dryland forests. J. Tropical Ecology 4:19–24.CrossRefGoogle Scholar
6.Aina, P.O. 1984. Contribution of earthworms to porosity and water infiltration in a tropical soil under forest and long term cultivation. Pedobiologia 26:131–136.CrossRefGoogle Scholar
7.Anderson, J.M. 1987. Interactions between invertebrates and microorganisms: Noise or necessity for soil processes? In Fletcher, M., Gray, T.R.G., and Jones, J.G. (eds). Ecology of Microbial Communities. Cambridge Univ. Press, Great Britain, pp. 125–145.Google Scholar
8.Anderson, J.M. 1988a. Spatiotemporal effects of invertebrates on soil processes. Biology and Fertility of Soils 6:189–203.CrossRefGoogle Scholar
9.Anderson, J.M. 1988b. Invertebrate mediated transport processes in soils. Agric., Ecosystems and Environment 24:5–19.CrossRefGoogle Scholar
10.Anderson, J.M., Leonard, M.A., Inson, P., and Huish, S.. 1985. Faunal biomass: A key component of a general model of N-mineralisation. Soil Biology and Biochemistry 17:735–737.CrossRefGoogle Scholar
11.Arnold, T.B., and Potter, D.A.. 1987. Impact of a high-maintenance lawn care program on nontarget invertebrates in Kentucky bluegrass turf. Environmental Entomology 16:100–105.CrossRefGoogle Scholar
12.Aritajat, U., Madge, D.S., and Gooderman, P.T.. 1977. The effect of compaction of agricultural soils on soil fauna. I. Field investigations. Pedobiologia 17:262–282.Google Scholar
13.Arpin, P., David, J.F., Guittonneau, G.G., Kilbertus, G., Ponge, J.F., and Vannier, G.. 1986. Influence of forest species and humus form on soil fauna and microflora. I. Description of forest plots and study of soil fauna. Revue d'Ecologie et de Biologie du Sol 23:89–118.Google Scholar
14.Arpin, P., and Ponge, J.F.. 1986. Effect of recent planting of Pinus sylvestris on the behaviour of the soil nematode fauna, by comparison with pure-hardwood and mixed plantations. Pedobiologia 29:391–404.CrossRefGoogle Scholar
15.Atkin, L., and Proctor, J.. 1988. Invertebrates in the litter and soil on Volcano Barva, Costa Rica. J. Tropical Ecology 4:307–310.CrossRefGoogle Scholar
16.Badego, M.A., and Lasebikan, B.A.. 1988. Comparative studies of the acarine populations of a secondary regrowth forest in Ile-Ife, Nigeria. Pedobiologia 32:111–116.CrossRefGoogle Scholar
17.Bagine, R.K.N. 1984. Soil translocation by termites of the genus Odontotermes (Holmgren) (Isoptera: Macrotermitinae) in an arid area of Northern Kenya. Oecologia (Berlin) 64:263–266.CrossRefGoogle Scholar
18.Bengtsson, G., and Rundgren, S.. 1988. The Gusum case: A brass mill and the distribution of soil Collembola. Canadian J. Zoology 66:1518–1526.CrossRefGoogle Scholar
19.Bird, G.A., and Chatarpaul, L.. 1986. Effect of whole tree and conventional forest harvest on soil microarthropods. Canadian J. Zoology 64:1986–1993.CrossRefGoogle Scholar
20.Blanchart, E., Lavelle, P., and Spain, A.V.. 1989. Effects of two species of tropical earthworms on the size distribution of aggregates in an African soil. Revue d'Ecologie et de Biologie du Sol 26:417–425.Google Scholar
21.Boag, B. 1988. Influence of ploughing, rotary cultivation and soil compaction on migratory plant-parasitic nematodes. Tillage and traffic in crop protection. Proceedings of the 11th International Conference of the International Soil and Tillage Research Organisation, pp. 209–214.Google Scholar
22.Boles, M., and Oseto, C.Y.. 1987. A survey of the microarthropod populations under conventional tillage and non-tillage systems. North Dakota Farm Research 44:17–18.Google Scholar
23.Braithwaite, R.W., Miller, L., and Wood, J.T.. 1988. The structure of termite communities in the Australian tropics. Australian J. Ecology 13:375–391.CrossRefGoogle Scholar
24.Calvin, E.B., and Diaz-Cosin, D.J.. 1985. Lombrices de tierra del valle del Tambre (Galicia, España). I. Relación con los factores del suelo. Revue d'Ecologie et de Biologie du Sol 22:341–351.Google Scholar
25.Calvin, E.B., and Diaz-Cosin, D.J.. 1986. Lombrices de tierra del valle del Tambre (Galicia, España). II. Análisis multivariante. Revue d'Ecologie et de Biologie du Sol 23:445–451.Google Scholar
26.di Castri, F., and Younes, T.. 1990. Ecosystem Function of Biological Diversity. Biology International Special Issue 22.Google Scholar
27.Cavalli, R. 1989. Sistemi di lavorazione del terreno. Macchine e Motori IMA il Trattorista 1:45–63.Google Scholar
28.Christensen, O., Daugbjerg, P., Hinge, J., Jensen, J.P., and Sigurdardottir, H.. 1987. Effekten af dyrkningspraksis pa regnorme og deres mulige rolle som bioindikatorer. Tidsskrift for Planteavl. 1:15–32.Google Scholar
29.Christiansen, T.A., Lockwood, J.A., and Powell, J.. 1989. Litter decomposition by arthropods in undisturbed and intensively managed mountain brush habitats. Great Basin Naturalist 49:562–569.Google Scholar
30.Clausen, C.P. 1940. Entomophagous Insects. McGraw-Hill. New York, N.Y.Google Scholar
31.Collins, N.M. 1980. The distribution of the soil macrofauna on west ridge of Gunung (Mount) Mulu, Sarawak. Oecologia (Berlin) 51:389–399.CrossRefGoogle Scholar
32.Collins, N.M. 1981. The role of termites in the decomposition of wood and leaf litter in the southern Guinea savanna of Nigeria. Oecologia 51:389–399.CrossRefGoogle ScholarPubMed
33.Collins, N.M. 1983. Termite populations and their role in litter removal in Malaysian rain forests. In Sutton, S.L., Whitmore, T.C., and Chadwich, A.C. (eds). Tropical Rainforest: Ecology and Management. Blackwell Scientific Publications, Oxford, pp. 311–325.Google Scholar
34.Coventry, R.J., Holt, J.A., and Sinclair, D.F.. 1988. Nutrient cycling by mound building termites in low fertility soils of semi-arid tropical Australia. Australian J. Soil Research 26:375–390.CrossRefGoogle Scholar
35.Critchley, B.R., Cook, A.G., Critchley, U., Perfect, T.G., Russell-Smith, A., and Yeadon, R.. 1979. Effects of bush clearing and soil cultivation on the invertebrate fauna of a forest soil in the humid tropics. Pedobiologia 19:425–438.CrossRefGoogle Scholar
36.Dangerfield, J.M. 1990. Abundance, biomass and diversity of soil macrofauna in savanna woodland and associated managed habitats. Pedobiologia 34:141–150.CrossRefGoogle Scholar
37.Darwin, C.R. 1881. The Formation of Vegetable Mould through the Action of Worms, with Observations on their Habitats. Murray, London, England.CrossRefGoogle Scholar
38.Dexter, A.R. 1978. Tunneling in soil by earthworms. Soil Biology and Biochemistry 10:447–449.CrossRefGoogle Scholar
39.Dunger, W. 1988. Zur Einwirkung von Kahlschlag, Grundwasserabsenkung und forstlicher Haldenrekultivierung auf die Boden-Makrofauna insbesondere Regenwürmer. Abhahndlungen und Berichte des Naturkundmuseums Gorlitz (Germany) 60:29–41.Google Scholar
40.Edwards, C.A. 1991. The assessment of populations of soil-inhabiting invertebrates. Agric., Ecosytems and Environment 34:145–176.CrossRefGoogle Scholar
41.Edwards, C.A., and Lofty, J.R.. 1982. The effect of direct drilling and minimal cultivation on earthworm populations. J. Applied Ecology 19:723–734.CrossRefGoogle Scholar
42.Edwards, C.A., Stinner, B.R., Stinner, D., and Rabatin, S. (eds). 1988. Biological Interactions in the Soil. Agric., Ecosystems and Environment 24:1–380.CrossRefGoogle Scholar
43.Elkins, N.Z., Sabol, G.V., Ward, T.J., and Whitford, W.G.. 1986. The influence of subterrenean termites on the hydrological characteristics of a Chihuahuan desert ecosystem. Oecologia (Berlin) 68:521–528.CrossRefGoogle ScholarPubMed
44.Elliott, E.T., Anderson, R.V., Coleman, D.C., and Cole, C.V.. 1980. Habitable pore space and microbial trophic interactions. Oikos 35:327–335.CrossRefGoogle Scholar
45.Erwin, T.L. 1982. Tropical forests;their richness in Coleoptera and other arthropod species. Coleopterist's Bulletin 36:74–75.Google Scholar
46.Eselbeis, G., and Wichard, W.. 1987. Atlas of the Biology of Soil Arthropods. Springer-Verlag, Berlin.Google Scholar
47.Faber, J.H. 1991. Functional classification of soil fauna: A new approach. Oikos 62:110–117.CrossRefGoogle Scholar
48.Fitter, A.H., Atkinson, D., Read, D.J., and Usher, M.B. (eds). 1985. Ecological Interactions in Soil: Plants, Microbes and Animals. Blackwell Scientific Publications, Oxford, England.Google Scholar
49.Freckman, D.W. 1982. Parameters of the nematode contribution to ecosystems. In Freckman, D. (ed). Nematodes in Soil Ecosystems. Univ. of Texas Press, Austin, pp. 81–97.CrossRefGoogle Scholar
50.Freckman, D.W., Whitford, W.G., and Steinberger, Y.. 1987. Effects of irrigation on nematode population dynamics and activity in desert soils. Biology and Fertility of Soils 3:3–10.Google Scholar
51.Garceau, C., Coderre, D., and Popovich, S.. 1988. The effect of ploughing and harrowing on the earthworm community in a recent deciduous plantation. Canadian.J. Zoology 66:1777–1782.CrossRefGoogle Scholar
52.Gaston, K.J. 1991. The magnitude of global insect species richness. Conservation Biology 5:283–296.CrossRefGoogle Scholar
53.Gauld, I.D. 1986. Taxonomy, its limitations and its role in understanding parasitoid biology. In Waage, J. and Greathead, D. (eds). Insect Parasitoids. Academic Press, London, pp 1–21.Google Scholar
54.Greenslade, P.W.N. 1985. Pterygote insects and the soil: Their diversity, their effects on soils and the problem of species identification. Quaestiones Entomologicae 21:571–585.Google Scholar
55.Griffiths, B.S. 1986. Mineralisation of nitrogen and phosphorus by mixed cultures of the ciliate protozoan Colpoda steinii, the nematode Rhabditis sp. and the bacterium Pseudomonas fluorescens. Soil Biology and Biochemistry 18:41–56.CrossRefGoogle Scholar
56.Griffiths, B.S. 1989. The role of bacteria feeding nematodes and protozoa in rhizosphere nutrient cycling. Aspects of Applied Biology 22:141–145.Google Scholar
57.Hagvar, S. 1987. Why do collemboles and mites react to changes in soil acidity? Entomologiske Meddelelser 55:115–119.Google Scholar
58.Hammond, P. 1990. Insect abundance and diversity in the Dumoga-Bone National Park, N. Sulawesi, with special reference to the beetle fauna of lowland rain forest in the Toraut region. In Knight, W.J. and Holloway, J.D. (eds). Insects and the Rain Forests of South East Asia (Wallacea). Royal Entomological Society of London, United Kingdom, pp. 197–254.Google Scholar
59.Hanlon, R.D.G., and Anderson, J.M.. 1979. The effects of Collembola grazing on microbial activity in decomposing leaf litter. Oecologia (Berlin) 38:93–100.CrossRefGoogle ScholarPubMed
60.Hassall, M., Turner, J.G., and Rands, M.R.W.. 1987. Effects of terrestrial isopods on the decomposition of woodland leaf litter. Oecologia (Berlin) 72:597–604.CrossRefGoogle ScholarPubMed
61.Hawksworth, D.L. 1991. The fungal dimension of biodiversity: Magnitude, significance, and conservation. Mycological Research 95:641–655.CrossRefGoogle Scholar
62.Hendrix, P.F., Parmelee, R.W., Crossley, D.A., Coleman, D.C., Odum, E.P., and Groffman, P.E.. 1986. Detritus food webs in conventional and non-tillage agroecosystems. BioScience 36:374–380.CrossRefGoogle Scholar
63.Hoda, F.M., El Beheri, M.M., Ibrahim, G.A., and Taha, H.A.. 1986. Effect of soil fertilisation and density of plants on the population of the spider mite Tetranychus cucubitacearum Sayed on soybean plants (Acari: Tetranychidae). Bulletin de la Société Entomologiqued' Egypt 66:97–101.Google Scholar
64.Hodkinson, I.D., and Casson, D.. 1991. A lesser predilection for bugs: Hemiptera (Insecta) diversity in tropical rain forests. Biological J. Linnaean Soc. 43:101–109.CrossRefGoogle Scholar
65.Holloway, J.D., and Stork, N.S.. 1991. The dimensions of biodiversity: The use of invertebrates as indicators of human impact. In Hawksworth, D.L. (ed). The Biodiversity of Microorganisms and Invertebrates: Its role in Sustainable Agriculture. CAB International, Wallingford. pp. 37–62.Google Scholar
66.Hopp, M., and Hopkins, H.T.. 1946. Earthworms as a factor in the formation of water stable aggregates. J. Soil and Water Conservation 1:11–13.Google Scholar
67.Hutson, B.R. 1980. Colonisation of industrial reclamation sites by Acari, Collembola and other invertebrates. J. Applied Ecology 17:255–275.CrossRefGoogle Scholar
68.Hutson, B.R., and Veitch, L.G.. 1987. Densities of Collembola and Acarina in the soil and litter of three indigenous South Australian forests related to layer, site and seasonal differences. Australian J. Ecology 3:239–261.CrossRefGoogle Scholar
69.Ingham, E.R., Coleman, D.C., and Moore, J.C.. 1989. An analysis of food-web structure and function in a shortgrass prairie, a mountain meadow, and a lodgepole pine forest. Biology and Fertility of Soils 8:29–37.CrossRefGoogle Scholar
70.Ingham, R.E., Trofymow, J.A., Ingham, E.R., and Coleman, D.C.. 1985. Interaction of bacteria, fungi and their nematode grazers: Effects on nutrient cycling and plant growth. Ecological Monographs 55:119–140.CrossRefGoogle Scholar
71.Jam, B.S.T., Yadava, P.S., and Elangbam, J.S.. 1986. Population densities of soil arthropods in the suntropical ecosystems at Shiroy Hill, Manipur. Proceedings of a National Symposium on Pesticide Residues and Environmental Pollution, Muzaffarnagar, India. Sanatan Dharm College, India, pp. 272–288.Google Scholar
72.Jones, F.G.W. 1957. Soil populations of beet eelworm (Heteroderma schactii Schm.) in relation to cropping. Nematologica 2:257–272.CrossRefGoogle Scholar
73.Jones, J.A. 1990. Termites, soil fertility and carbon cycling in dry tropical Africa: A hypothesis. J. Tropical Ecology 6:291–305.CrossRefGoogle Scholar
74.Kalisz, P.J., and Stone, E.L.. 1984. Soil mixing by Scarab beetles and pocket gophers in north central Florida. Soil Sci. Soc. Am. J. 48:169–172.CrossRefGoogle Scholar
75.King, K.L., Greenslade, P., and Hutchinson, K.H.. 1985. Collembolan associations in natural versus improved pastures of the New England Tableland, NSW: Distribution of native and introduced species. Australian J. Ecology 10:421–427.CrossRefGoogle Scholar
76.Kiss, I., and Jager, F.. 1987. Investigation on the role of the soil-mesofauna with litter-bag method under arable land conditions. Bull, of the Univ. of Agric. Sciences, Godollo 1:99–104.Google Scholar
77.Kladivko, E.J., Mackay, A.D., and Bradford, D.M.. 1986. Earthworms as a factor in the reduction of soil crusting. Soil Sci. Soc. Am. J. 50:191–196.CrossRefGoogle Scholar
78.Krebs, C.J. 1985. Ecology. The Experimental Analysis of Distribution and Abundance. 3rd ed.Chapman and Hall, London, England.Google Scholar
79.Krishnamoorthy, R.V. 1985. A comparative study of wormcast production by earthworm populations from grassland and woodland sites near Bangalore, India. Revue d'Ecologie et de Biologie du Sol 22:209–219.Google Scholar
80.Laker, M.C., Hewitt, P.H., Nel, A., and Hunt, R.P.. 1984. Effects of the termite Trineritermes trinervoides Sjostedt on the organic carbon and nitrogen contents and particle size distribution in soils. Revue d'Ecologie et de Biologie du Sol 19:27–39.Google Scholar
81.Largerlof, J., and Andren, O.. 1988. Abundance and activity of soil mites (Acari)in four cropping systems. Pedobiologia 32:129–145.CrossRefGoogle Scholar
82.Lasebikan, B.A. 1975. The effects of clearing on the soil arthropods of a Nigerian rain forest. Biotropica 7:84–89.CrossRefGoogle Scholar
83.Lavelle, P. 1988a. Earthworm activities and the soil system. Biology and Fertility of Soils 6:237–251.CrossRefGoogle Scholar
84.Lavelle, P. 1988b. Assessing the abundance and role of soil macroinvertebrate communities in tropical soils: Aims and methods. Revue de Zoologie Africaine 102:275–283.Google Scholar
85.Leakey, R.J.G., and Proctor, J.. 1987. Invertebrates in the litter and soil at a range of altitudes on Gunung Silam, a small ultrabasic mountain in Sabah. J. Tropical Ecology 3:119–129.CrossRefGoogle Scholar
86.Lee, K.E. 1983. The influence of earthworms and termites on soil nitrogen cycling. In P. Lebrun, H.M. André, A. de Medts, C. GregioreWibo, and G. Wauthy (eds). New Trends in Soil Biology. Dieu-Brichart, Louvain-la-Neuve. pp. 35–48.Google Scholar
87.Lee, K.E. 1985. Earthworms: Their Ecology and Relationships with Soils and Land Use. Academic Press, London, England.Google Scholar
88.Lee, K.E., and Wood, T.G.. 1971. Termites and Soil. Academic Press, London.Google Scholar
89.Lobry de Bruyn, L.A., and Conacher, A J.. 1990. The role of termites and ants in soil modification: A review. Australian J. Soil Research 28:55–93.Google Scholar
90.Luizao, F.J. 1985. Influencia da calagem e adubacao organica na mesofauna e nas propriedades fisicas de um Latossolo Amarelo textura argilosa. Revista Brasileira de Ciencia do Sol 9:81–84.Google Scholar
91.Mackay, A.D., Syers, J.K., Springett, J.A., and Gregg, P.E.H.. 1982. Plant availability of phosphorus in superphosphate and a phosphate rock as influenced by earthworms. Soil Biology and Biochemistry 14:281–287.CrossRefGoogle Scholar
92.Marinissen, J.C.Y., and Bok, J.. 1988.Earthworm amended soil structure: Its influence on Collembola populations in grassland. Pedobiologia 32:243–352.CrossRefGoogle Scholar
93.Martin, A. 1991. Short and long term effects of the effects of the endogeic earthworm Millsonia anomalam (Megaloscolecidae: Oligochaetea) of tropical savannas, on soil organic matter. Biology and Fertility of Soils 11:234–238.CrossRefGoogle Scholar
94.May, R.M. 1990a. Taxonomy as destiny. Nature 347:129–130.CrossRefGoogle Scholar
95.May, R.M. 1990b. How many species? Philosophical Transactions of the Royal Society, Series B 330:293–304.Google Scholar
96.Moldenke, A., Shaw, C., and Boyle, J.R.. 1991. Computer-driven image-based soil fauna taxonomy. Agric., Ecosystems and Environment 34:177–185.CrossRefGoogle Scholar
97.Nakamura, Y. 1988. The effect of soil management on the soil faunal makeup of a cropped andosol in Central Japan. Soil and Tillage Research 12:177–186.CrossRefGoogle Scholar
98.Newell, K. 1984a. Interaction between two decomposer basidiomycetes and a collembolan under Sitka spruce: Distribution, abundance and selective grazing. Soil Biology and Biochemistry 16:227–233.CrossRefGoogle Scholar
99.Newell, K. 1984b. Interaction between two decomposer basidiomycetes and a collembolan under Sitka spruce: Grazing and its potential effects on fungal distribution and litter decomposition. Soil Biology and Biochemistry 16:235–239.CrossRefGoogle Scholar
100.Nye, P.H. 1955. Some soil forming processes in the humid tropics. IV. The action of the soil fauna. J. Soil Science 6:73–83.CrossRefGoogle Scholar
101.O'Brien, B.J., and Stout, J.D.. 1978. Movement and turnover of soil organic matter as indicated by carbon isotope measurements. Soil Biology and Biochemistry 10:309–317.CrossRefGoogle Scholar
102.Paine, R.T. 1969. A note on trophic complexity and community stability. American Naturalist 103:91–93.CrossRefGoogle Scholar
103.Pankhurst, R J. 1986. A package of computer programs for handling taxonomic databases. Computer Applications in the Biosciences 2:33–39.Google ScholarPubMed
104.Pankhurst, R J. 1988. An interactive program for the construction of identification keys. Taxon 37:747–755.CrossRefGoogle Scholar
105.Parmenter, R.R., and MacMahon, J.A.. 1987. Early succesional patterns of arthropod recolonisation on reclaimed strip mines in southwestern Wyoming: The ground-dwelling beetlefauna (Coleoptera). Environmental Entomology 16:168–177.CrossRefGoogle Scholar
106.Pawluk, S. 1985. Soil micromorphology and soil fauna: Problems and importance. Quaestiones Entomologicae 21:473–496.Google Scholar
107.Pawluk, S. 1987. Faunal micromorphological features in moder humus of some western Canadian soils. Geoderma 40:3–16.CrossRefGoogle Scholar
108.Petersen, H., and Luxton, M.. 1982. A comparative analysis of soil fauna populations and their role in decomposition processes. Oikos 39:288–388.CrossRefGoogle Scholar
109.Pimm, S.L. 1982. Food Webs. Chapman and Hall, New York, N.Y.CrossRefGoogle Scholar
110.Pimm, S.L., Lawton, J.H., and Cohen, J.E.. 1991. Food web patterns and their consequences. Nature 350:669–674.CrossRefGoogle Scholar
111.Pradhan, G.B., Senapati, B.K., and Dash, M.C.. 1988. Relationship of soil nematode populations to carbon: Nitrogen in tropical habitats and their role in the laboratory decomposition of litter amendments. Revue d'Ecologie et de Biologie du Sol 25:59–76.Google Scholar
112.Rabatin, S.C., and Stinner, B.R.. 1988. Indirect effects of interactions between VAM fungi and soil inhabiting invertebrates on plant processes. Agric., Ecosystems and Environment 24:135–146.CrossRefGoogle Scholar
113.Redford, K.H. 1984. The termitaria of Cornitermes cumulans and their role in determining potential keystone species. Biotropica 16:112–119.CrossRefGoogle Scholar
114.Rogers, L.E., and Lavigne, R.J.. 1974. Environmental effects of Western harvester ants on the shortgrass plains ecosystem. Environmental Entomology 3:994–997.CrossRefGoogle Scholar
115.Rusek, J. 1985. Soil microstructures – contributions on specific organisms. Quaestiones Entomologicae 21:497–514.Google Scholar
116.Rushton, S.P. 1988. Earthworms in pastoral agriculture. Outlook on Agric. 17:44–48.CrossRefGoogle Scholar
117.Salick, J., Herrera, R., and Jordan, C.F.. 1983. Termitaria: Nutrient patchiness in nutrient-deficient rainforests. Biotropica 15:1–7.CrossRefGoogle Scholar
118.Santos, P.P., Phillips, J., and Whitford, W.G.. 1981. The role of mites and nematodes in early stages of buried litter decomposition in a desert. Ecology 62:34–45.CrossRefGoogle Scholar
119.Schaefer, M., and Scauermann, J.. 1990. The soil fauna of beech forests: Comparison between a mull and a moder soil. Pedobiologia 34:299–314.CrossRefGoogle Scholar
120.Setala, H., Haimi, J.., and Huhta, V.. 1988. A microcosm study on the respiration and weight loss in birch litter and raw humus as influenced by soil fauna. Biology and Fertility of Soils 5:282–287.CrossRefGoogle Scholar
121.Sharpley, A.N., and Syers, J.K.. 1976. Potential role of earthworm casts for phosphorus enrichment of run-off waters. Soil Biology and Biochemistry 8:341–346.CrossRefGoogle Scholar
122.Shaw, C.H., Lundkvist, H., Moldenke, A., and Boyle, J.R.. 1991. The relationships of soil fauna to long-term forest production in temperate and boreal ecosystems: Processes and research strategies. In W.J. Dyck and C.A. Mees (eds). Long-term field trials to Assess Environmental Impacts of Harvesting. Proceedings, IEA/BE T6/A6 Workshop, Florida, USA, February 1990. IEA/BE T6/A6 Report No. 5. FRI Bulletin No. 161. Forest Research Institute, Rotorua, New Zealand, pp. 39–77Google Scholar
123.Sims, R.W. 1982. Lumbricina. In Parker, S.P. (ed). Synopsis and Classification of Living Organisms. Vol. 2. McGraw-Hill Book Co., New York, N.Y. pp. 55–61.Google Scholar
124.Southwood, T.R.E. 1978. Ecological Methods. Chapman and Hall, London, England.Google Scholar
125.Spence, J.R. (ed). 1985. Faunal Influences on Soil Structure. Symposium volume. Quaestiones Entomologicae 21:371–386.Google Scholar
126.Stinner, B.R., McCartney, D.A., and van Doren, D.M. Jr., 1988. Soil and foliage arthropod communities in conventional, reduced and no-tillage corn (maize, Zea mays L.) systems: A comparison after 20 years of continuous cropping. Soil and Tillage Research 11:147–158.CrossRefGoogle Scholar
127.Stockdill, S.M.J. 1982. Effects of introduced earthworms on the productivity of New Zealand pastures. Pedobiologia 24:29–35.CrossRefGoogle Scholar
128.Stork, N.B. 1988. Insect diversity: Facts, fiction and speculation. Biological J. Linnaean Soc. 35:321–337.CrossRefGoogle Scholar
129.Stork, N.B., and Brendell, M.J.D.. (in press). Arthropod diversity studies in lowland rainforest of Seram, Indonesia. In J. Proctor and I. Edwards (eds). The Natural History of Seram. Edinburgh Botanic Gardens, United Kingdom.Google Scholar
130.Stork, N.E., and Gaston, K.J.. 1990. Counting species one by one. New Scientist 1729:43–47.Google Scholar
131.Svensson, B.H., Bostrom, U., and Klemedtson, L.. 1986. Potential for higher rates of denitrifi cation in earthworm casts than the surrounding soil. Biology and Fertility of Soils 2:147–149.CrossRefGoogle Scholar
132.Syers, J.K., Sharpley, A.N., and Keeney, D.R.. 1979. Cycling of nitrogen by surface-casting earthworms in a pasture ecosystem. Soil Biology and Biochemistry 11:181–185.CrossRefGoogle Scholar
133.Sykes, G.B. 1979. Yield losses in barley, wheat, and potatoes associated with field populations of “large form” Longidorus leptocephalus. Annals of Applied Biology 91:237–241.CrossRefGoogle Scholar
134.Takeda, H. 1988. A 5 year study of pine needle litter decomposition in relation to mass loss and faunal abundance. Pedobiologia 32:221–226.CrossRefGoogle Scholar
135.Thomas, C. 1990. Fewer species. Nature 347:237.CrossRefGoogle Scholar
136.Tousignant, S., Coderre, D., and Popovich, S.. 1988. L'effet du labour-hersage sur la mesofaune du sol en plantation de feuilles. Pedobiologia 31:283–291.CrossRefGoogle Scholar
137.van Amelsvoort, P.A.M., van Dongen, M., and van der Werff, P.A.. 1988. The impact of Collembola on humidification and mineralization of soil organic matter. Pedobiologia 31:103–111.CrossRefGoogle Scholar
138.van Straalen, N.M., Kraak, H.S., and Denneman, C.A J.. 1988. Soil arthropods as indicators of soil acidification and forest decline in the Veluwe area, The Netherlands. Pedobiologia 32:47–55.CrossRefGoogle Scholar
139.Walter, D.E., Hunt, H.W., and Elliott, E T.. 1988. Guilds or functional groups? An analysis of predatory arthropods from a shortgrass steppe Soil. Pedobiologia 31:247–260.CrossRefGoogle Scholar
140.Whitford, W.G. 1989. Abiotic controls on the functional structure of soil food webs. Biology and Fertility of Soils 8:1–6.CrossRefGoogle Scholar
141.Wood, T.G. 1988. Termites and the soil environment. Biology and Fertility of Soils 6:228–236.CrossRefGoogle Scholar
142.Wright, D.H., and Coleman, D.C.. 1988. Soil fauna versus fertilization on plant nutrition: Results of a biocide experiment. Biology and Fertility of Soils 7:46–52.CrossRefGoogle Scholar
143.Wright, D.H., Huhta, V., and Coleman, D.C.. 1989. Characteristics of defaunated soil. II. Effects of reinoculation and the role of the mineral component. Pedobiologia 33:427–435.CrossRefGoogle Scholar
144.Yeates, G.W. 1987. Significance of developmental stages in the coexistence of three species of Manonchoidea (Nematoda) in a pasture soil. Biology and Fertility of Soils 5:225–229.CrossRefGoogle Scholar
145.Yeates, G.W., and Coleman, D.C.. 1982. Role of nematodes in decomposition. In Freckman, D. (ed). Nematodes in Soil Ecosystems. Univ. of Texas Press, Austin, pp. 55–80.CrossRefGoogle Scholar