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Liana Ecology Project
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ABSTRACT:
Impact of an exotic vine Clematis vitalba (F. Ranunculaceae) and of control measures on plant biodiversity in indigenous forest Taihape New Zealand
Journal Article
Ogle C; La Cock G; Arnold G; Mickleson N
2000
Austral Ecology
25
539-551
The exotic vine Clematis vitalba L. (F. Ranunculaceae) has been in forest reserves around Taihape in the Rangitikei Ecological Region of the central North Island New Zealand for about 70 years. Before this weed was abundant Taihape forests were rich in species of indigenous vascular plants especially woody species. Clematis vitalba and its control are contributing to a loss of forest structure and of indigenous biodiversity at the ecosystem and species levels to a lack of recruitment of indigenous species to an influx of other weeds and to changes in growth forms of indigenous shrubs. Species that have disappeared or become uncommon in forest with C. vitalba tend to be those that are nationally threatened or uncommon have restricted distributions or are biogeographically significant. Current control of C. vitalba in the Taihape forest is piecemeal and long-term. It is based on mechanical and chemical methods followed by grazing with sheep to prevent regeneration. Recommendations are made for rapid removal of C. vitalba from all untreated parts of the reserve followed by manual control or spot-spraying permanent removal of sheep control of other serious weeds and implementation of a restoration programme.
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