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The mosaic theory of forest regeneration and the determination of forest composition in Ghana

Published online by Cambridge University Press:  10 July 2009

M. D. Swaine  and
J. B. Hall
M. D. Swaine
Affiliation:
Department of Plant Science, The University, Aberdeen AB9 2UD, Scotland
J. B. Hall
Affiliation:
Department of Plant Science, The University, Aberdeen AB9 2UD, Scotland
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Abstract

Early studies comparing adult and juvenile tree populations in West Africa described a contrast in flonstic composition between the two age classes. These studies have been mis-represented in more recent literature, and confusion has arisen over their interpretation.

Similar comparisons are reported here for six forest sites in Ghana. At any one site, clear differences in composition were recognized between adult and juvenile samples, but in terms of the variation in flonstic composition over the whole of the forest zone, they are slight and forest types appear to ‘breed true’.

At one site, Kade, compositional differences between size classes are fully described for all canopy species on a 0.25 ha plot. There was an abrupt change in composition at about 30 cm gbh. At this site, mortality rates for trees >30 cm gbh were greater amongst species with a high proportion of juveniles in the population. At other sites, changes in composition were sometimes abrupt, occurring at various size classes, or were more gradual.

The populations of some species included a large number of juveniles at all sample sites, but the converse, where species always have low densities of juveniles, were not seen. The possible implications of these results for future canopy composition are discussed in relation to temporal equilibrium, or lack of it, in tropical forest composition.

Keywords

equilibriumforest compositionforest dynamicsforest typesGhanamortalitymosaic theoryregenerationtropical forest
Type
Research Article
Information
Journal of Tropical Ecology , Volume 4 , Issue 3 , August 1988 , pp. 253 - 269
Copyright
Copyright © Cambridge University Press 1988

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References

LITERATURE CITED

Aubréville, A. 1938. La forêt colomale. Annales, Academic des Sciences Coloniales 9:1–245.Google Scholar
Clements, F. E. 1916. Plant succession: analysis of the development of vegetation. Carnegie Institute of Washington Publication 242, Washington, DC.Google Scholar
Connell, J. H., Tracey, J. G. & Webb, L. J. 1984. Compensatory recruitment, growth and mortality as factors maintaining rain forest tree diversity. Ecological Monographs 54:141–164.CrossRefGoogle Scholar
Eyre, S. R. 1971. Regeneration patterns in the closed forest of Ivory Coast by Aubréville, A.. Translated as pp. 41–55 in World vegetation types. Macmillan, London.Google Scholar
Grubb, P. J. 1977. The maintenance of species richness in plant communities: the importance of the regeneration ruche. Biological Reviews 52:107–145.CrossRefGoogle Scholar
Hall, J. B. & Swaine, M. D. 1976. Classification and ecology of closed-canopy forest in Ghana. Journal of Ecology 64:913–951.CrossRefGoogle Scholar
Hall, J. B. & Swaine, M. D. 1981. Distribution and ecology of vascular plants in a tropical rain forest. W. Junk, The Hague.CrossRefGoogle Scholar
Hartshorn, G. S. 1980. Neotropical forest dynamics. Pp. 23–30 in Ewel, J. (ed.). Tropical Succession, special issue Biotropica 12.Google Scholar
Hill, M. O. 1973. Reciprocal averaging: an eigenvector method of ordination. Journal of Ecology 61:237–249.CrossRefGoogle Scholar
Hill, M. O. & Gauch, H. G. 1980. Detrended correspondence analysis: an improved ordination technique. Vegetatio 42:47–58.CrossRefGoogle Scholar
Hubbell, S. P. 1979. Tree dispersion, abundance and diversity in a tropical dry forest. Science 203:1299–1309.CrossRefGoogle Scholar
Hubbell, S. P. & Foster, R. B. 1986. Canopy gaps and the dynamics of a neotropical forest. Pp. 77–96 in Crawley, M. J. (ed.). Plant ecology. Blackwell Scientific Publications, Oxford.Google Scholar
Jones, E. W. 1950. Some aspects of natural regeneration m the Benin rain forest. Empire Forestry Journal 29:108–124.Google Scholar
Jones, E. W. 1955–1956. Ecological studies on the rain forest of southern Nigeria IV. The plateau forest of the Okomu Forest reserve. Journal of Ecology 43:564–594; 44:83–117.CrossRefGoogle Scholar
Manokaran, N. & Kochummen, K. M. 1987. Recruitment, growth and mortality of tree species in a lowland dipterocarp forest in Peninsular Malaysia. Journal of Tropical Ecology 3:315–330.CrossRefGoogle Scholar
Lawson, G. W., Armstrong-Mensah, K. O. & Hall, J. B. 1970. A catena in tropical moist semideciduous forest near Kade, Ghana. Journal of Ecology 58:371–398.CrossRefGoogle Scholar
Pickett, S. T. A. 1980. Non-equilibrium coexistence of plants. Bulletin of the Torrey Botanical Club 107:238–248.CrossRefGoogle Scholar
Richards, P. W. 1952. The tropical ram forest. Cambridge University Press, Cambridge.Google Scholar
Riswan, S. 1982. Ecological studies on primary, secondary and experimentally cleared mixed dipterocarp forest and kerangas forest m East Kalimantan, Indonesia. Ph.D. thesis, University of Aberdeen.Google Scholar
Rollet, B. 1974. L'architecture des fôrets denies humides sempervirentes deplaine. Centre Tech. For. Trop., Nogen-sur-Marne.Google Scholar
Swaine, M. D., Hall, J. B. & Alexander, I. J. 1987. Tree population dynamics at Kade, Ghana (1968–1982). Journal of Tropical Ecology 3:331–345.CrossRefGoogle Scholar
Watt, A. S. 1981. Further observations on the effects of excluding rabbits from a grassland in East Anglian breckland: the pattern of change and factors affecting it (1936–73). Journal of Ecology 69:509–536.CrossRefGoogle Scholar
Whitmore, T. C. 1974. Change with time and the role of cyclones in tropical rain forest on Kolombangara, Solomon Islands. Commonwealth Forestry Institute Paper No. 46.Google Scholar
Wyatt-Smith, J. 1966. Ecological studies on Malayan forests I. Research Pamphlet, 52, Forest Research Institute, Malaya.Google Scholar