Ecological Research

, Volume 9, Issue 3, pp 311–316 | Cite as

Field evidence of plastic growth responses to habitat heterogeneity in the clonal herbRanunculus repens

  • Stephen Waite
Article

Abstract

Stolon internode lengths were measured on plants of the clonal herbRanunculus repens growing in a hay meadow which was subject to disturbance by mole (Talpa europaea) activity. Within the site three habitat types were recognized: closed grassland, the open ground of fresh molehills and the grass-molehill boundary. The lengths of stolon internodes ofR. repens differed significantly in each of the three habitats. The shortest internodes occurred on stolons on the open molchills. The longest occurred in the closed grassland habitat. The type of habitat in which parent ramets were rooted did not significantly influence the length of internodes on their daughter stolons. The length of a stolon internode was determined by its immediate surrounding habitat type. Consecutive internode lengths on a given stolon showed considerable plasticity, shortening significantly as stolons spread onto molehills from surrounding habitats, and increasing significantly as stolons advanced from a molehill into the surrounding closed grassland habitat. These results are consistent with the proposition that under favorable conditions (on the molehills, where resources are expected to be more abundant, and competition absent) internode lengths shorten and the plant forages intensively, whereas under conditions of low resource availability (in the closed grassland, where competition occurs) internode lengths increase, allowingR. repens to forage extensively. Such morphological plasticity may promote more efficient exploitation of resource-rich sites and more rapid vacation of resource-poor sites.

Key words

Clonal growth foraging grassland plasticity Ranunculus repens 

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References

  1. Cook R. E. (1985). Growth and development in clonal plant populations. In:Population Biology and Evolution of Clonal Organisms (eds J. B. C. Jackson, L. W. Buss & R. E. Cook) pp. 259–296. Yale University Press, New Haven.Google Scholar
  2. Darlington A. &Brown A. L. (1975)One Approach to Ecology. Longman, London.Google Scholar
  3. Devore J. L. (1982)Probability and Statistics for Engineering and the Sciences. Brooks/Cole Publishing, Monterey.Google Scholar
  4. Elton C. S. (1966)The Pattern of Animal Communities. Methuen & Co. Ltd, London.Google Scholar
  5. Ginzo H. D. &Lovell P. H. (1973) Aspects of the comparative physiology ofRanunculus bulbosus L. andRanunculus repens L. I. Response to nitrogen.Annals of Botany.37, 753–764.Google Scholar
  6. Grime J. P., Crick J. C., &Rincon J. E. (1986) The ecological significance of plasticity. In:Plasticity in Plants (eds D. H. Jennings & A. J. Trewavas) pp. 5–29. Biologists Limited, Cambridge.Google Scholar
  7. Harper J. L. (1977)The Population Biology of Plants. Academic Press, London.Google Scholar
  8. Harper J. L. (1985) Modules, branches and the capture of resources. In:Population Biology and Evolution of Clonal Organisms (eds J. B. C. Jackson, L. W. Buss & R. E. Cook) pp. 1–33. Yale University Press, New Haven.Google Scholar
  9. Harper J. L. &Bell A. D. (1979) The population dynamics of growth form in organisms with modular construction. In:Population Dynamics (eds R. M. Anderson, B. M. Turner & L. R. Taylor) pp. 29–52. 20th Symposium of British Ecological Society. Blackwell Scientific Publications, Oxford.Google Scholar
  10. Hutchings M. J. (1988) Differential foraging for resources and structural plasticity in plants.Trends in Ecology and Evolution 3, 200–204.CrossRefGoogle Scholar
  11. Hutchings M. J. &de Kroon H. (1994) Foraging in plants: The role of morphological plasticity in resource acquisition.Advances in Ecological Research 25, 159–238.Google Scholar
  12. Hutchings M. J. &Mogie M. (1990) The spatial structure of clonal plants: Control and consequences. In:Clonal Growth in Plants: Regulation and Function. (eds J. van Groenendael & H. de Kroon) pp. 57–76. SPB Academic Publishers, The Hague.Google Scholar
  13. Hutchings M. J. &Slade A. J. (1988) Morphological plasticity, foraging and integration in clonal perennial herbs. In:Plant Population Ecology (eds A. J. Davy, M. J. Hutchings & A. R. Watkinson) pp. 83–119. 28th Symposium of the British Ecological Society. Blackwell Scientific Publications, Oxford.Google Scholar
  14. Hutchings M. J. & Turkington R. (1994). Plasticity of branching patterns in clonal herbs.Proceedings of the 5th International Symposium of Plant Biosystematics (in press).Google Scholar
  15. Jalloq M. C. (1975) The invasion of molehills by weeds as a possible factor in the degeneration of reseeded pasture. I. The buried viable seed population of molehills from reseeded pastures in west Wales.Journal of Applied Ecology 12, 643–657.Google Scholar
  16. Lovett Doust L. (1981a) Population dynamics and local specialization in a clonal perennial (Ranunculus repens). I. The dynamics of ramets from contrasting habitats.Journal of Ecology 69, 743–755.Google Scholar
  17. Lovett Doust L. (1981b) Population dynamics and local specialization in a clonal perennial (Ranunculus repens). II. The dynamics of leaves and a reciprocal transplant-replant experiment.Journal of Ecology 69, 757–768Google Scholar
  18. Lovett Doust L. (1981c) Intraclonal variation and competition inRanunculus repens.New Phytologist 89, 495–502.Google Scholar
  19. Lovett Doust L. (1987) Population dynamics and local specialization in a clonal perennial (Ranunculus repens). III. Responses to light and nutrient supply.Journal of Ecology 75, 555–568.Google Scholar
  20. Oborny B. (1991) Criticisms on optimal foraging in plants: A review.Abstracts of Botany 15, 67–76.Google Scholar
  21. Schmid B. (1990) Some ecological and evolutionary consequences of modular organization and clonal growth in plants.Evolutionary Trends in Plants 4, 25–34.Google Scholar
  22. Slade A. J. &Hutchings M. J. (1987a). The effects of nutrient availability on foraging in the clonal herbGlechoma hederacea.Journal of Ecology 75, 95–112.Google Scholar
  23. Slade A. J. &Hutchings M. J. (1987b). The effects of light intensity on foraging in the clonal herb.Glechoma hederacea. Journal of Ecology 75, 639–650.Google Scholar
  24. Slade A. J. &Hutchings M. J. (1987c). Clonal integration and plasticity in foraging behaviour inGlechoma hederacea.Journal of Ecology 75, 1023–1036.Google Scholar
  25. Sutherland W. J. &Stillman R. A. (1988) The foraging tactics of plants.Oikos 52, 239–244Google Scholar
  26. Wallwork J. A. (1970)Ecology of Soil Animals. McGraw-Hill, Maidenhead.Google Scholar

Copyright information

© Ecological Society of Japan 1994

Authors and Affiliations

  • Stephen Waite
    • 1
  1. 1.Biology and Ecology Section, Department of PharmacyUniversity of BrightonBrightonUK

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