Abstract

Previous studies on islands of heathland vegetation in southern England have shown that the area of a heathland and the extent to which it is surrounded by other heathland only partly explain variations in observed invertebrate diversity and species composition. Attempts were made to explain invertebrate diversity in terms of the vegetation types surrounding the heathlands. Invertebrates were sampled on twenty-two heathlands and the extent of nine vegetation types on the periphery of these heathlands was assessed. Results showed that where structurally more diverse vegetation surrounded a heathland, there was a tendency for invertebrate diversity to be greater on the heathland. Where less structurally diverse vegetation surrounded a heathland, few changes in invertebrate diversity were detected.

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