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Report - Alternatives to fenthion for quelea bird control
… resistant crops Bullard & Gebrekidan (1989) described how plant breeders can produce crop cultivars that have … and, if so, there is a possibility that future progress in genetic manipulation might allow the introduction of lethal … UK. Jaeger, M.E. & Elliott, C.C.H. 1989. Quelea as a resource. In Bruggers, R.L. and Elliott, C.C.H. (eds.) Quelea …
The valuation of ecosystem services: Are the challenges too many to ensure the maintenance of ecosystem integrity?
… one enjoys from the pure knowledge that a natural resource exists. The method of valuation depends on the type … 2 Provisioning services includes food and fibre, fuel, genetic resources, biochemicals, natural medicines, and … the services coming from the original system. A filtration plant for instance replaces only a small part of what a …
Evaluating effectiveness : A framework for assessing management effectiveness of protected areas
… management in a changing environment; assist in effective resource allocation; promote accountability and transparency; … reflect whether the long-term objectives are met (e.g. are plant and animal populations stable, are ecological systems … or socially important species etc) Local population level Genetic level Landscape and geological Evidence of formation …