Summary
There is widespread uncertainty about the nature and role of morphological plasticity in resource competition in plant communities. We have assayed the foraging characteristics of leaf canopies and root systems of eight herbaceous plants of contrasted ecology using new techniques to create controlled patchiness in light and mineral nutrient supply. The results are compared with those of a conventional competition experiment. Measurements of dry matter partitioning and growth in patchy conditions indicate a consistent positive association between the foraging characteristics of roots and shoots, supporting the hypothesis of strong interdependence of competitive abilities for light and mineral nutrients. Differences are identified in the abilities of dominant and subordinate plants to forage on coarse and fine scalcs. It is suggested that a trade-off exists in the scale (“high” in dominants) and precision (high in subordinates) with which resources are intercepted and that this trade-off contributes to diversity in communities of competing plants.
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References
Aung LG (1974) Root-shoot relationships. In: Carson EW (ed) The Plant Root and its Environment. University Press, Virginia, pp 29–61
Bhat KKS, Nye PH (1973) Diffusion of phosphate to plant roots in soil. 1. Quantitative autoradiography of the depletion zone. Plant Soil 38:161–175
Bloom AJ, Chapin FS, Mooney HA (1985) Resource limitation in plants-an economic analogy. Ann Rev Ecol Syst 16:363–92
Campbell BD, Grime JP (1989a) A new method of exposing developing root systems to controlled patchiness in mineral nutrient supply. Ann Bot 63:395–400
Campbell BD, Grime JP (1989b) A comparative study of plant responsiveness to the duration of episodes of mineral nutrient enrichment. New Phytol 112:261–267
Chapin FS III (1980) The mineral nutrition of wild plants. Ann Rev Ecol Syst 11:233–260
Clapham AR, Tutin TG, Warburg EF (1981) Excursion Flora of the British Isles. 3rd edition. Cambridge University Press, Cambridge
Clarkson DT (1967) Phosphorus supply and growth rate in species ofAgrostis L. J Ecol 55:111–118
Crick JC, Grime JP (1987) Morphological plasticity and mineral nutrient capture in two herbaceous species of contrasted ecology. New Phytol 107:403–414
Donald CM (1958) The interaction of competition for light and for nutrients. Aust J Agric Res 9:421–432
Drew MC (1975) Comparison of the effect of a localized supply of phosphate, nitrate, ammonium and potassium on the growth of the seminal root system and the shoot in barley. New Phytol 75:479–490
Drew MC, Saker LR, Ashley TW (1973) Nutrient supply and the growth of the seminal root system in barley. III. The effect of nitrate concentration on the growth of axes and laterals. J Exp Bot 24:1189–1202
Field C, Mooney HA (1986) The photosynthesis-nitrogen relationship in wild plants. In: Givnish TV (ed) On the economy of plant form and function. Cambridge Univ Press, Cambridge, pp 25–55
Fitter AH, Ashmore CJ (1974) Response ofVeronica species to a simulated woodland light climate. New Phytol 73:997–1001
Fitter AH, Hay RKM (1987) Environmental Physiology of Plants. Academic Press, London, p 423
Givnish TJ (1982) On the adaptive significance of leaf height in forest herbs. Am Nat 120:353–381
Givnish TJ (1986) Biomechanical constraints on crown geometry in forest herbs. In: Givnish TJ (ed) On the economy of plant form and function. Cambridge University Press, Cambridge, pp 525–583
Glecson SK, Tilman D (1990) Allocation and the transient dynamics of succession on poor soils. Ecology 71:1144–1155
Granato TC, Raper CD (1989) Proliferation of Maize (Zea mays L.) roots in response to localised supply of nitrate. J Exp Bot 40:263–275
Grime JP (1966) Shade avoidance and shade tolerance in flowering plants. In: Bainbridge R, Evans GC, Rackham O (eds) Light as an Ecological Factor. Blackwell Scientific Publications Oxford, pp 187–207
Grime JP (1973) Competitive exclusion in herbaceous vegetation. Nature 242:344–347
Grime JP (1974) Vegetation classification by reference to strategies. Nature 250:26–31
Grime JP (1977) Evidence for the existence of three primary strategies in plants and its relevance to ecological and evolutionary theory. Am Nat 111:1169–1194
Grime JP (1979) Plant strategies and vegetation processes. John Wiley & Sons Ltd., Chichester, p 222
Grime JP (1987) Dominant and subordinate components of plant communities: implications for succession, stability and diversity. In: Gray AJ, Crawley MJ, Edwards JP (eds) Colonization, Succession and Stability. Blackwell Oxford, pp 413–428
Grime JP, Crick JC, Rincon JE (1986) The ecological significance of plasticity. In: Jennings DH, Trewavas A (eds) Plasticity in Plants. Cambridge Univ Press, Cambridge pp 7–29
Grime JP, Hunt R (1976) Relative growth rate: its range and adaptive significance in a local flora. J Ecol 63:393–422
Grubb PJ (1985) Plant populations and vegetation in relation to habitat, disturbance and competition: problems of generalization. In: White J, Beeftink J (eds) The Population Structure of Vegetation. Dr W. Junk, Dordrecht, pp 595–621
Hewitt EJ (1966) Sand and Water Culture Methods used in the Study of Plant Nutrition, 2nd Edition. Commonwealth Agricultural Bureaux Technical Communication No. 22, East Malling, Kent, p 547
Higgs DE, James DB (1969) Comparative studies on the biology of upland grasses. I. Rate of dry-matter production and its control in four grass species. J Ecol 57:443–563
Huston MA, Smith TM (1987) Plant succession Life history and competition. Am Nat 130:168–198
Hutchings MJ (1988) Differential foraging for resources and structural plasticity in plants. Trends Ecol Evol 3:200–204
Iwasa Y, Roughgarden J (1984) Shoot/root balance of plants: optimal growth of a system with many vegetative organs. Theor Popul Biol 25:78–104
Jackson RB, Caldwell MM (1989) The timing and degree of root proliferation in fertile-soil microsites for three cold-desert perennials. Oecologia 81:149–153
Langer RHM (1979) How grasses grow. Second Edition. Arnold, London, p 66
McMahon TA (1973) Shape and size in biology. Science 179:1202–1204
Mahmoud A, Grime JP (1976) An analysis of competitive ability in three perennial grasses. New Phytol 77:431–435
Newman EI (1973) Competition and diversity in herbaceous vegetation. Nature 244:310
Nye PH (1966) The effect, of nutrient intensity and buffering power of a soil, and the absorbing power, size and root hairs of a root, on nutrient absorption by diffusion. Plant Soil 25:81–105
Nye PH (1969) The soil model and its application to plant nutrition. In: Rorison IH (ed) Ecological Aspects of the Mineral Nutrition of Plants, Blackwell Scientific Publications, Oxford, pp 105–114
Olff H, van Andel J, Bakker JP (1990) Biomass and shoot/root allocation of five species from a grassland succession series at different combinations of light and nutrient supply. Funct Ecol 4:193–200
Reader RJ, Best BJ (1989) Variation in competition along an environmental gradient:Hieracium floribundum in an abandoned pasture. J Ecol 77:673–684
Shipley B, Peters RH (1990) A test of the Tilman model of plant strategies: relative growth rate and biomass partitioning. Am Nat 136:139–153
Slade AJ, Hutchings MJ (1987a) The effects of nutrient availability on foraging in the clonal herbGlechoma hederacea J Ecol 75:95–112
Slade AJ, Hutchings MJ (1987b) Clonal integration and plasticity in foraging behaviour inGlechoma hederacea. J Ecol 75:1023–1036
Smith H, Morgan DC (1981) The spectral characteristics of the visible radiation incident upon the surface of the earth. In: Smith H (ed) Plants and the Daylight Spectrum. Academic Press, New York, pp 3–20
Stern WR (1965) The effect of density on the performance of individual plants in subterranean clover swards. Aust J Agric Res 16:541–555
Sutherland WJ, Stillman RA (1988) The foraging tactics of plants. Oikos 52:239–244
Tilman D (1987) On the meaning of competition and the mechanisms of competitive superiority. Funct Ecol 1:304–315
Tilman D (1988) Plant Strategies and the Structure and Dynamics of Plant Communities. Princeton University Press, Princeton
Tilman D (1989) Competition, nutrient reduction and the competitive neighbourhood of a bunchgrass. Funct Ecol 3:215–219
Tilman D, Cowan ML (1989) Growth of old field herbs on a nitrogen gradient. Funct Ecol 3:425–438
Wiersum LK (1958) Density of root branching as affected by substrate and separate ions. Acta Bot Neerl 7:174–190
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Campbell, B.D., Grime, J.P. & Mackey, J.M.L. A trade-off between scale and precision in resource foraging. Oecologia 87, 532–538 (1991). https://doi.org/10.1007/BF00320417
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DOI: https://doi.org/10.1007/BF00320417