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The Invasion of Highlands in Galá'pagos by the Red Quinine-tree Cinchona succirubra

Published online by Cambridge University Press:  24 August 2009

Ian A.W. Macdonald ,
Luis Ortiz ,
Jonas E. Lawesson  and
J. Bosco Nowak
Ian A.W. Macdonald
Affiliation:
Chief Scientific Officer, Percy FitzPatrick Institute of African Ornithology, University of Cape Town, Rondebosch 7700, South Africa
Luis Ortiz
Affiliation:
Associate Investigator, Charles Darwin Research Station, Isla Santa Cruz, Galápagos, Ecuador
Jonas E. Lawesson
Affiliation:
Botanical Institute, 68 Nordlandsvej, 8240 Risskov, Denmark
J. Bosco Nowak
Affiliation:
Charles Darwin Research Station, Isla Santa Cruz, Galápagos, Ecuador
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Extract

The alien tree species Cinchona succirubra, the Red Quinine-tree (Rubiaceae), was introduced to the Galápagos Islands, Ecuador, in 1946, for purposes of cultivation, but causes much concern as, by 1987, it was found to cover about 4,000 hectares in the highlands of Santa Cruz Island, changing the original, largely endemic, vegetation. Some limited herbicide trials have been made by the Galápagos National Park Service, but a really successful method of controlling this pest still remains to be found.

The removal of Cinchona plants from a 1000-ha Intensive Control Area (ICA) within the Galápagos National Park has been successful to date. However, large stands of the tree exist in the adjacent agricultural area of Santa Cruz Island, as well as elsewhere in the National Park. With the maturation of these stands, an increased input of Cinchona succirubra seeds to the ICA can be anticipated.

Strengthened use of manual, chemical, and biological, control measures are therefore recommended on a shortterm basis, in order to conserve the unique highland vegetation of Santa Cruz Island, Galápagos.

Type
Main Papers
Information
Environmental Conservation , Volume 15 , Issue 3 , Autumn 1988 , pp. 215 - 220
Copyright
Copyright © Foundation for Environmental Conservation 1988

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