Vegetational changes in the Galápagos Islands during the period 1966–1973 |
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| Authors: | Ole Hamann |
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| Institution: | 1. Institute of Systematic Botany, University of Copenhagen, 140 Gothersgade, 1123 Copenhagen, Denmark;2. In 1971–1972 UNESCO associate expert in plant ecology, The Charles Darwin Research Station, Isla Santa Cruz, Galápagos, Ecuador |
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| Abstract: | Analysis of 12 permanent sample plots established in the Galápagos showed that introduced mammals have had a destructive influence on the vegetation; closed forest and scrub have been changed into open vegetation. The plots provide information on the regeneration ability of various types of vegetation. Scalesia forest, dominated by the endemic Scalesia pedunculata Hook. f., might under certain circumstances regenerate rapidly. Miconia scrub, dominated by the endemic Miconia robinsoniana Cogn., regenerates slowly and is consequently more vulnerable to the activities of man and introduced mammals. Arid zone vegetation, characterised especially by endemic species of Opuntia, is able to regenerate, but it is still too early to estimate how the regeneration will proceed. The suggested conservation measures include a continuation of the programme for elimination or control of introduced mammals, and a stronger control with the National Park areas on inhabited islands. Financial support is needed for the Galápagos National Park Service and the Charles Darwin Research Station to continue and enlarge the activities necessary to preserve the unique wildlife of the Galápagos Islands. |
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