Conflicts of interest in environmental management: estimating the costs and benefits of a tree invasion

摘要: Some alien tree species used in commercial forestry cause major problems as invaders of natural ecosystems. One such case, the black wattle tree, was introduced into South Africa from Australia 19th century. It is an important species, well aggressive invader, giving rise to significant environmental impacts and conflicts interest. This paper provides analysis costs benefits associated with this at a national level. The results suggest that ‘do nothing’ scenario (with no attempts being made control spread beyond limits plantations) not sustainable, benefit–cost ratio around 0.4. most attractive option will be combine physical clearing plant-attacking biological continuation growing activities. In case practically feasible next best combination seed-attacking control, development secondary industries based on wood products programmes. There is, however, 40% loss involved when compared first option. techniques study, findings relating scenarios deliver returns investment, should broad relevance problem dealing interest invasive plants have value.