Original Research

Dynamics of the forest vegetation of the Umtiza Nature Reserve, East London

J. J. Midgley, P. N. Gobetz
Bothalia | Vol 23, No 1 | a796 | DOI: https://doi.org/10.4102/abc.v23i1.796 | © 1993 J. J. Midgley, P. N. Gobetz | This work is licensed under CC Attribution 4.0
Submitted: 10 October 1993 | Published: 10 October 1993

About the author(s)

J. J. Midgley, Division of Forest Science and Technology, South Africa
P. N. Gobetz, Cape Provincial Administration. Umtiza Nature Reserve

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Abstract

The forest community at the Umtiza Nature Reserve near East London was surveyed using 24 plots (0.04 ha) in which all woody stems >0.5 m tall were enumerated. Based on a classification using numbers of stems of canopy species, it was assumed that basically only one forest community was sampled. Further multivariate analyses suggest that this forest is fine-grained. Sample plots were similarly placed in ordination space irrespective of whether woody species occurrence was used as importance value or if species occurrence per size class was used separately [seedlings (0.5-1.0 m), saplings (1-5 m) or canopy individuals (> 5 m)). An analysis of size-class distributions of the most common canopy species indicated that the majority of species exhibited inverse J-shaped size-class distributions. This is the expected pattern for a fine-grained forest. In these measures of dynamics, this forest is not fundamentally different to the more temperate Afromontane forests.


Keywords

dynamics; eastern Cape; forests; grain; size-class distribution

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