Challenges related to soil biodiversity research in agroecosystems - Issues within the context of scale of observation

Canadian Journal of Soil Science

Volumn 83, Issue 3, 2003, Pages 231-244

  Fox, C A ^a   MacDonald, K B ^b  

^a AGRICULTURE AND AGRI FOOD CANADA   (Canada)

^b Teeswater   (Canada)

Author keywords

Agroecosystems; Scale of observation; Soil biodiversity; Soil quality

Indexed keywords

AGROECOLOGY; BIODIVERSITY; SOIL BIOTA; SOIL QUALITY;

CELLULAR ORGANISMS;

EID: 0042914810     PISSN: 00084271     EISSN: None     Source Type: Journal    
DOI: 10.4141/s01-059     Document Type: Article

References (102)

1. Acton, D. F. (Ed.) 1994. A program to assess and monitor soil quality in Canada. Soil Quality Evaluation Program summary report. Centre for Land and Biological Resources Research, Research Branch, Agriculture and Agri-Food Canada, Ottawa, ON. 201 pp.
2. Acton, D. F. 1995a. Development and effects of farming in Canada. Pages 11-18 in D. F. Acton and L. J. Gregorich, eds. The health of our soils - toward sustainable agriculture in Canada. Centre for Land and Biological Resources Research, Research Branch, Agriculture and Agri-Food Canada, Ottawa, ON. xiv + 138 pp.
3. Acton, D. F. 1995b. Preface. Pages ix-x in D. F. Acton and L. J. Gregorich, eds. The health of our soils - toward sustainable agriculture in Canada. Centre for Land and Biological Resources Research, Research Branch, Agriculture and Agri-Food Canada, Ottawa, ON. xiv + 138 pp.
4. Acton, D. F. and Gregorich, L. J. (Eds.) 1995. The health of our soils - toward sustainable agriculture in Canada. Centre for Land and Biological Resources Research, Research Branch, Agriculture and Agri-Food Canada, Ottawa, ON. xiv + 138 pp.
5. Acton, D. F. and Padbury, G. A. 1994. Introduction: Program initiation. Pages 1-2 to 1-6 in D. F. Acton, ed. A program to assess and monitor soil quality in Canada. Soil Quality Evaluation Program summary report. Centre for Land and Biological Resources Research, Research Branch, Agriculture and Agri-Food Canada, Ottawa, ON. 201 pp.
6. Agriculture and Agri-Food Canada. 1997a. Agriculture in harmony with nature: Strategy for environmentally sustainable agriculture and agri-food development in Canada. Agriculture and Agri-Food Canada. Minister of Public Works and Government Services, Ottawa, ON. Publ. 1937/E, 72 pp.
7. Agriculture and Agri-Food Canada. 1997b. Biodiversity in agriculture: Agriculture and Agri-Food Canada's Action Plan. Environment Bureau, Agriculture and Agri-Food Canada, Minister of Public Works and Government Services Canada, Ottawa, ON. 45 pp.
8. Agriculture and Agri-Food Canada. 2001. Agriculture in harmony with nature: Agriculture and Agri-Food Canada's sustainable development strategy 2001-2004. Minister of Public Works and Government Services Canada, Ottawa, ON. Publ. 2074/E, 67 pp.
9. Allen, T. F. H. and Hoekstra, T. W. 1992. Toward a unified ecology. Columbia University Press, New York, NY. 384 pp.
10. Altieri, M. A. 1999. The ecological role of biodiversity in agro-ecosystems. Agric. Ecosyst. Environ. 74: 19-31.
11. Anderson, J. M. 1994. Functional attributes of biodiversity in land use systems. Pages 267-290 in D. J. Greenland and I. Szabolcs, eds. Soil resilience and sustainable land use. CAB International, Wallingford, UK.
12. Anderson, J. M. 1995. Soil organisms as engineers: microsite modulation of macroscale processes. Pages 94-106 in C. G. Jones and J. H. Lawton, eds. Linking species and ecosystems. Chapman and Hall, New York, NY.
13. Arshad, M. A. and Martin, S. 2002. Identifying critical limits for soil quality indicators in agro-ecosystems. Agric. Ecosyst. Environ. 88: 153-160.
14. Beare, M. H., Coleman, D. C., Crossley Jr., D. A., Hendrix, P. F. and Odum, E. P. 1995. A hierarchical approach to evaluating the significance of soil biodiversity to biogeochemical cycling. Pages 5-22 in H. P. Collins, G. P. Robertson, and M. J. Klug, eds. The significance and regulation of soil biodiversity. Developments in plant and soil sciences. Vol. 63. Kluwer Academic Publishers, Dordrecht The Netherlands. 292 pp.
15. Beeby, A. 1993. Applying ecology. Chapman and Hall, London, UK. 441 pp.
16. Begon, M., Harper, J. L. and Townsend, C. R. 1990. Ecology: Individuals, populations and communities. Blackwell Scientific Publications, Boston, MA. 945 pp.
17. Brown, J. H. 1995. Macroecology. The University of Chicago Press, Chicago, IL. 269 pp.
18. Brussaard, L., Behan-Pelletier, V. M., Bignell, D. E., Brown, V. K., Didden, W., Folgarait, P., Fragoso, C., Wall Freckman, D., Gupta, V. V. S. R., Hattori, T., Hawksworth, D. L., Klopatek, C., Lavelle, P., Malloch, D. W., Rusek, J., Söderström, B., Tiedje, J. M. and Virginia, R. A. 1997. Biodiversity and ecosystem functioning in soil. Ambio 26: 563-570.
19. Buckerfield, J. C., Lee, K. E., Davoren, C. W. and Hannay, J. N. 1997. Earthworms as indicators of sustainable production in dryland cropping in southern Australia. Soil Biol. Biochem. 29: 547-554.
20. Burel, F., Baudry, J., Butet, A., Clergeau, P., Delettre, Y., Le Coeur, D., Dubs, F., Morvan, N., Paillet, G., Petit, S., Thenail, C., Brunel, E. and Lefeuvre, J.-C. 1998. Comparative biodiversity along a gradient of agricultural landscapes. Acta Oecol. 19: 47-60.
21. Carson, R. 1962. Silent Spring. Houghton Mifflin, Boston, MA.
22. Clapperton, M. J. and Reid, D. M. 1992. A relationship between plant growth and increasing VA mycorrhizal inoculum density. New Phytol. 120: 227-234.
23. Cole, L. J., McCracken, D. I., Foster, G. N. and Aitken, M. N. 2001. Using collembola to assess the risks of applying metal-rich sewage sludge to agricultural land in western Scotland. Agric. Ecosyst. Environ. 83: 177-189.
24. Daugbjerg, P., Hinge, J., Jensen, J. P. and Sigurdardottir, H. 1988. Earthworms as bioindicators of cultivated soils? Ecol. Bull. 39: 45-47.
25. DeAngelis, A. 1992. Dynamics of nutrient cycling and food webs. Chapman and Hall, London, UK. 265 pp.
26. De Ruiter, P. C., Van Veen, J. A., Moore, J. C., Brussard, L. and Hunt, H. W. 1993. Calculation of nitrogen mineralization in soil food webs. Plant Soil 157(2): 263-273.
27. Doran, J. W. and Parkin, T. B. 1994. Defining and assessing soil quality. Pages 3-21 in J. W. Doran, D. C. Coleman, D. F. Bezdicek, and B. A. Stewart, eds. Defining soil quality for a sustainable environment. SSSA Special Publication No. 35. SSSA Inc., ASA, Inc., Madison, WI. 244 pp.
28. Doran, J. W. and Parkin, T. B. 1996. Quantitative indicators of soil quality: A minimum data set. Pages 25-37 in J. W. Doran and A. J. Jones, eds. Methods for assessing soil quality. SSSA Special Publication No. 49, SSSA, Inc., Madison, WI. 410 pp.
29. Doran, J. W., Coleman, D. C., Bezdicek, D. F. and Stewart, B. A. (Eds.) 1994. Defining soil quality for a sustainable environment. SSSA Special Publication No. 35. SSSA Inc., ASA, Inc., Madison, WI. 244 pp.
30. Doube, B. M. and Schmidt, O. 1997. Can the abundance and activity of soil macrofauna be used to indicate the biological health of soils? Pages 265-295 in C. E. Pankhurst, B. M. Doube, and V. V. S. R. Gupta, eds. Biological indicators of soil health. CAB International, Wallingford, UK. 451 pp.
31. Ecological Stratification Working Group. 1995. A National Ecological Framework for Canada. Agriculture and Agri-Food Canada, Research Branch, Centre for Land and Biological Resources Research and Environment Canada, State of the Environment Directorate, Ecozone Analysis Branch, Ottawa/Hull. Report and national map at 1:7 500 000 scale.
32. Ellert, B. H., Clapperton, M. J. and Anderson, D. W. 1997. An ecosystem perspective of soil quality. Pages 115-141 in E. G. Gregorich and M. R. Carter, eds. Soil quality for crop production and ecosystem health. Developments in Soil Science 25. Elsevier, Amsterdam, The Netherlands. 448 pp.
33. Elliot, E. T. 1997. Rationale for developing bioindicators of soil health. Pages 49-78 in C. E. Pankhurst, B. M. Doube, and V. V. S. R. Gupta, eds. Biological indicators of soil health. CAB International, Wallingford, UK. 451 pp.
34. Environment Canada. 1995. Canadian biodiversity strategy: Canada's response to the Convention on Biological Diversity. Department of Supply and Services, Ottawa, ON.
35. Food and Agricultural Organization of the United Nations 2001. Agricultural biological diversity. Soil biodiversity and sustainable agriculture. Paper submitted to the Executive Secretary of the Subsidiary Body on Scientific, Technical and Technological Advice (SBSTTA) of Convention on Biological Diversity for Seventh SBSTTA meeting 12-16 November 2001, Montreal, QC. UNEP/CBD/SBSTTA/7/INF/11. [Online] Available: http:// www.biodiv.org/doc/meeting.asp?wg=SBSTTA-07&thm= SBS&tab= 1.
36. Forman, R. T. T. 1995. Land mosaics: The ecology of landscapes and regions. Cambridge University Press, Cambridge, UK. 632 pp.
37. Fox, C. A., MacDonald, K. B., Jarvis, I., Walker, B. D. and Pettapiece, W. W. 1996. Protocols for a soil ecosystem approach for characterizing soil biodiversity. In A. Finnamore, ed. A workshop report on terrestrial arthropods. Sampling protocols for graminoid ecosystems. [Online] Available: http://eqb-dqe.cciw.ca/ eman/reports/publications/sage/sage9.htm.
38. Frampton, G. K. 1997. The potential of Collembola as indicators of pesticide usage: evidence and methods from the UK arable ecosystem. Pedobiologia 41: 179-184.
39. Franchini, P. and Rockett, C. L. 1996. Oribatid mites as "indicator" species for estimating the environmental impact of conventional and conservation tillage practices. Pedobiologia 40: 217-225.
40. Freekman, D. W. (Ed.) 1994. Life in the soil, soil biodiversity: Its importance to ecosystem processes. Report of a Workshop held at Natural History Museum, London, UK. 30 August to 1 September 1994. Natural Resource Ecology Laboratory, College of Natural Resources, Colorado State University, Fort Collins, CO. 26 pp.
41. Frink, C. R., Waggoner, P. E. and Ausubel, J. H. 1999. Nitrogen fertilizer: Retrospect and prospect. Proc. Natl. Acad. Sci. USA 96: 1175-1180.
42. Gotelli, N. J. 1998. A primer of ecology. 2nd ed. Sinaner Associates, Inc., Sunderland, MA. 236 pp.
43. Greenslade, P. 1997. Are Collembola useful as indicators of the conservation value of native grasslands? Pedobiologia 41: 215-220.
44. Gregorieh, E. G. and Carter, M. R. (Eds.) 1997. Soil quality for crop production and ecosystem health. Developments in Soil Science 25. Elsevier, Amsterdam, The Netherlands. 448 pp.
45. Gupta, V. V. S. R. and Yeates, G. W. 1997. Soil microfauna as bioindicators of soil health. Pages 201-233 in C. E. Pankhurst, B. M. Doube, and V. V. S. R. Gupta, eds. Biological indicators of soil health. CAB International, Wallingford, UK. 451 pp.
46. Gunderson, L. H. 2000. Ecological resilience - in theory and application. Annu. Rev. Ecol. Syst. 31: 425-439.
47. Haynes, R. J. and Tregurtha, R. 1999. Effects of increasing periods under intensive amble vegetable production on biological, chemical and physical indices of soil quality. Biol. Fertil. Soils 28: 259-266.
48. Hirvonen, H. 1992. The development of regional scale ecological indicators: A Canadian approach. Pages 901-915 in D. H. Mackenzie, D. E. Hyatt, and V. J. McDonald, eds. Ecological indicators. Vol.2 Applied Science, Elsevier, Amsterdam, The Netherlands.
49. Hodkinson, I. D. and Wookey, P. A. 1999. Functional ecology of soil organisms in tundra ecosystems: towards the future. Appl. Soil Ecol. 11: 111-126.
50. Hollander, A. D., Davis, F. W. and Stoms, D. M. 1994. Hierarchical representations of species distributions using maps, images and sighting data. Pages 71-88 in R. I. Miller, ed. Mapping the diversity of nature. Chapman and Hall, London, UK. 218 pp.
51. Huffman, E., Eilers, R. G., Padbury, G., Wall, G. and MacDonald, K. B. 2000. Canadian agri-environmental indicators related to land quality: integrating census and biophysical data to estimate soil cover, wind erosion and soil salinity. Agric. Ecosyst. Environ. 81: 113-123.
52. Hunt, H. W., Coleman, D. C., Ingham, E. R., Ingham, R. E., Elliot, E. T., Moore, J. C., Rose, S. L., Reid, C. P. P. and Morley, C. R. 1987. The detrital food web in a short-grass prairie. Biol. Fertil. Soils 3: 57-68.
53. Innes, J. L. 1998. Measuring environmental change. Pages 429-457 in D. L. Peterson and V. T. Parker, eds. Ecological scale: Theory and applications. Columbia University Press, New York, NY. 615 pp.
54. Karlen, D. L., Andrews, S. S. and Doran, J. W. 2001. Soil quality: Current concepts and applications. Adv. Agron. 74: 1-40.
55. Karlen, D. L., Mausbach, M. J., Doran, J. W., Cline R. G., Harris, R. F. and Schuman, G. E. 1997. Soil quality: A concept, definition, and framework for evaluation (a guest editorial). Soil Sci. Soc. Am. J. 61: 4-10.
56. Kay, J. J. 1991. The concept of ecological integrity, alternative theories of ecology, and implications for decision-support indicators. Pages 23-58 in Canadian Environmental Advisory Council (CEAC). Economic, Ecological, and Decision Theories: Indicators of Ecologically Sustainable Development. Ottawa: CEAC. Prepared under contract for the CEAC Workshop on Indicators for Ecologically Sustainable Development (Ottawa, July 1990). Minister of Supply and Services Canada, Ottawa, ON. Cat.No. En92-11/1991E, 90 pp.
57. Killham, K. 1994. Soil ecology. University Press, Cambridge, UK. 242 pp.
58. King, A. W. 1999. Hierarchy theory and the landscape ... level? or: Words do matter. Pages 6-9 in J. A. Wiens and M. R. Moss, eds. Issues in landscape ecology. International Association for Landscape Ecology, Fifth World Congress. Snowmass Village, CO. 151 pp.
59. Lal, R. 1998. Soil quality and sustainability. Pages 17-30 in R. Lal, W. H. Blum, C. Valentine, and B.A. Stewart, eds. Methods for assessment of soil degradation. Advances in Soil Science. CRC Press, New York, NY.
60. Larson, W. E. and Pierce, F. J. 1994. The dynamics of soil quality as a measure of sustainable management. Pages 37-51 in J. W. Doran, D. C. Coleman, D. F. Bezdicek, and B. A. Stewart, eds. Defining soil quality for a sustainable environment. SSSA Special Publication No. 35. SSSA Inc., ASA Inc., Madison, WI. 244 pp.
61. Lazarovits, G. 1997. Assessment of influence of manures for the control of soilborne pests including fungi, bacteria and nematodes. Canada-Ontario Agriculture Green Plan, COESA Report No. RES/MAN-010/97.
62. Lavelle, P. 2000. Ecological challenges for soil science. Soil Sci. 165: 73-86.
63. Linden, D. R., Hendrix, P. F., Coleman, D. C. and van Vliet, P. C. J. 1994. Faunal indicators of soil quality. Pages 91-106 in J. W. Doran, D. C. Coleman, D. F. Bezdicek, and B. A. Stewart, eds. Defining soil quality for a sustainable environment. SSSA Special Publication No. 35. SSSA Inc., ASA, Inc., Madison, WI. 244 pp.
64. MacDonald, K. B., Wang, F., Fraser, W. R. and Lelyk, G. W. 1998. Broad-scale assessment of agricultural soil quality in Canada using existing Land Resource Databases and GIS. Agriculture and AgriFood Canada, Research Branch, Public Works and Government Services of Canada, Ottawa, ON. Technical Bulletin 1998-3E, xi + 95 pp.
65. Marshall, I. B., Smith, C. A. S. and Selby, C. J. 1996. A national framework for monitoring and reporting on environmental sustainability in Canada. Environ. Monit. Assess. 39: 25-38.
66. Martinez, N. D. and Dunne, J. A. 1998. Time, space, and beyond: Scale issues in food-web research. Pages 207-226 in D. L. Peterson and V. T. Parker, eds. Ecological scale: Theory and applications. Columbia University Press, New York, NY. 615 pp.
67. McGill, W. B. and Spence, J. R. 1985. Soil fauna and soil structure: Feedback between size and architecture. Quaest. Entomol. 21: 645-654.
68. McLaughlin, A. and Mineau, P. 1995. The impact of agricultural practices on biodiversity. Agric. Ecosyst. Environ. 55: 201-212.
69. McRae, T., Smith, C. A. S. and Gregorich, L. J. (Eds.) 2000. Environmental sustainability of Canadian agriculture: Report of the Agri-Environmental Indicator Project. Agriculture and AgriFood Canada, Ottawa, ON. 224 pp.
70. Mermut, A. R. 1985. Faunal influence on soil microfabrics and other soil properties. Quaest. Entomol. 21: 595-608.
71. Mills, J. T. and Alley, B. P. 1973. Interactions between biotic components in soils and their modification by management practices in Canada: A review. Can. J. Plant Sci. 53: 425-441.
72. Neave, P., Neave, E., Wiens, T. and Riche, T. 2000. Availability of wildlife habitat on farmland. Pages 145-156 in T. McRae, C. A. S. Smith, and L. J. Gregorich, eds. Environmental sustainability of Canadian agriculture: Report of the Agri-Environmental Indicator Project. Agriculture and Agri-Food Canada, Ottawa, ON. 224 pp.
73. Neher, D. A. 2001. Role of nematodes in soil health and their use as indicators. J. Nematol. 33: 161-168.
74. Pankhurst, C. E. 1997. Biodiversity of soil organisms as an indicator of soil health. Pages 297-324 in C. E. Pankhurst, B. M. Doube, and V. V. S. R. Gupta, eds. Biological indicators of soil health. CAB International, Wallingford, UK. 451 pp.
75. Pankhurst, C. E., Hawke, B. G., McDonald, H. J., Kirkby, C. A., Buckerfield, J. C., Michelsen, P., O'Brien, K. A, Gupta, V. V. S. R. and Doube, B. M. 1995. Evaluation of soil biological properties as potential bioindicators of soil health. Aust. J. Exp. Agric. 35: 1015-1028.
76. Paoletti, M. G. 1999. The role of earthworms for assessment of sustainability and as bioindicators. Agric. Ecosyst. Environ. 74: 137-155.
77. Parmelee, R. W. 1995. Soil fauna: Linking different levels of ecological hierarchy. Pages 107-116 in C. G. Jones and J. H. Lawton, eds. Linking species and ecosystems. Chapman and Hall, New York, NY.
78. Petersen, H. and Luxton, M. 1982. A comparative analysis of soil fauna populations and their role in decomposition processes. Oikos 39: 288-388.
79. Rice, W. A. 1982. Performance of Rhizobium meliloti strains selected for low-pH tolerance. Can. J. Plant Sci. 62: 941-948.
80. Richards, B. N. 1974. Introduction to the soil ecosystem. Longman Inc., New York, NY. 266 pp.
81. Ritz, K. and Trudgill, D. L. 1999. Utility of nematode community analysis as an integrated measure of the functional state of soils: perspectives and challenges. Plant Soil 212: 1-11.
82. Russell, E. W. 1973. Soil conditions and plant growth. Longman, London, UK. 849 pp.
83. Shaw, C. and Pawluk, S. 1986. The development of soil structure by Octolasion tyrtaeum, Aporrectodea turgida and Lumbricus terrestris in parent materials belonging to different textural classes. Pedobiologia 29: 327-339.
84. Smith, C. A. S. 1995. Research and development needs in monitoring agroecosystems in Canada. Agri-Environmental Indicator Project, Agriculture and Agri-Food Canada, Ottawa, ON. Report No. 12, 15 pp.
85. Stork, N. E. and Eggleton, P. 1992. Invertebrates as determinants and indicators of soil quality. Am. J. Alt. Agric. 7: 38-47.
86. Swift, M. J. and Anderson, J. M. 1993. Biodiversity and ecosystem function in agricultural systems. Pages 15-41 in E.-D. Schulze and H. A. Mooney, eds. Biodiversity and ecosystem function. Springer-Verlag, New York, NY. 525 pp.
87. Swift, M. J., Heal, O. W. and Anderson, J. M. 1979. Decomposition in terrestrial ecosystems. Blackwell, Oxford, UK.
88. Topp, E., Hanson, R. S., Ringelberg, D. B., White, D. C. and Wheatcroft, R. 1993. Isolation and characterization of an N-methylcarbamate insecticide-degrading methylotrophic bacterium. Appl. Environ. Microbiol. 59: 3339-3349.
89. Traquair, J. 1995. Fungal biocontrol of root diseases: endomycorrhizal suppression of cylindrocarpon root rot. Can. J. Bot. 73 (Suppl.1): S89-S95.
90. Turco, R. F., Kennedy, A. C. and Jawson, M. D. 1994. Microbial indicators of soil quality. Pages 73-90 in J. W. Doran, D. C. Coleman, D. F. Bezdicek, and B. A. Stewart, eds. Defining soil quality for a sustainable environment. SSSA Special Publication No. 35. SSSA Inc., ASA, Inc., Madison, WI. 244 pp.
91. VandenBygaart, A. J., Fox, C. A., Fallow, D. J. and Protz, R. 2000. Estimating earthworm-influenced soil structure by morphometric image analysis. Soil Sci. Soc. Am. J. 64: 982-988.
92. van Straalen, N. M. 1997. Community structure of soil arthropods as a bioindicator of soil health. Pages 235-264 in C. E. Pankhurst, B. M. Doube, and V. V. S. R. Gupta, eds. Biological indicators of soil health. CAB International, Wallingfrod, UK. 451 pp.
93. Wallwork, J. A. 1970. Ecology of soil animals. McGraw-Hill, London, UK.
94. Wild, A. 1995. Soils and the environment: An introduction. University Press, Cambridge, UK. 287 pp.
95. Willard, J. R. 1973a. Soil invertebrates: III. Collembola and minor insects: Populations and biomass. Canadian Committee for the International Biological Programme, Matador Project. University of Saskatchewan and National Research Council of Canada. Technical Report No. 19. 75 pp.
96. Willard, J. R. 1973b. Soil invertebrates: IV. Acarina, minor Arachnida and Chilopoda: Populations and biomass. Canadian Committee for the International Biological Programme, Matador Project. University of Saskatchewan and National Research Council of Canada. Technical Report No. 20. 75 pp.
97. Willard, J. R. 1973c. Soil invertebrates: V. Nematoda: Populations and biomass. Canadian Committee for the International Biological Programme, Matador Project. University of Saskatchewan and National Research Council of Canada. Technical Report No. 21. 60 pp.
98. Willard, J. R. 1974. Soil invertebrates: VII. Enchytraeidae (Annelida: Oligochaeta): Populations and biomass. Canadian Committee for the International Biological Programme, Matador Project. University of Saskatchewan and National Research Council of Canada. Technical Report No. 28. 101 pp.
99. Willard, J. R., Fisher, V. and Petrovich, M. 1973. Soil invertebrates: VI. Nematodes: Trophic classification and structure of the population. Canadian Committee for the International Biological Programme, Matador Project. University of Saskatchewan and National Research Council of Canada. Technical Report No. 26. 40 pp.
100. Wolters, V. 2001. Biodiversity of soil animals and its function. Eur. J. Soil Biol. 37: 221-227.
101. Xavier, L. J. C. and Germida, J. J. 1998. Response of spring wheat cultivars to Glomus clarum NT4 in a P-deficient soil containing arbuscular mycorrhizal fungi. Can. J. Soil Sci. 78: 481-484.
102. Zurlini, G., Amadio, V. and Rossi, O. 1999. A landscape approach to biodiversity and biological health planning: The map of Italian nature. Ecosystem Health 5(4): 294-311.