The role of resource economics in the control The role of resource economics in the control of invasive alien plants in South Africa of invasive alien plants in South Africa Author: Jane Turpie Author: Jane Turpie Turpie, J. (2004).The role of resource economics in the control of invasive alien plants in South Africa. S. Afr. Sci. 100, 87-93.
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The role of resource economics in the control of invasive alien plants in South Africa Author: Jane Turpie Turpie, J. (2004).The role of resource economics.
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The role of resource economics in the control The role of resource economics in the control of invasive alien plants in South Africaof invasive alien plants in South Africa
Author: Jane TurpieAuthor: Jane Turpie
Turpie, J. (2004).The role of resource economics in the controlof invasive alien plants in South Africa. S. Afr. Sci. 100, 87-93.
8750 introduced species. Over 200 considered to be seriously invasive. By 1997, 180 woody plant species covered 10 million
hectares of land.
General:General:
The Fynbos biome is hardest hit. Grassland and Savanna biomes worst hit in the moister
areas. Semi-arid Nama and Succulent Karoo biomes invaded
by saltbushes, cacti, and mesquite trees. Extent of invasions in forests is unknown.
The biomes effected:The biomes effected:
Realisation of implications of invasive species for water supply.
Placed it into an economic context. This led to the establishment of the WfW. Have cleared over 171 000 ha. Follow up weeding of 183 000 ha. 24 000 people employed in 2000. Spent over R3 billion.
Why established and successes:Why established and successes:
In a strict sense the term biodiversity should include ecosystem functioning as well as species richness.
Ecological-economics recognises the important role played by ecosystems in the economy.
Ecosystems have both tangible and non-consumptive values.
Tangible goods carry the most political weight.
Ecological-economics:Ecological-economics:
Structural diversity and organisation of ecosystems must be maintained.
This maintains the systems primary productivity, which in turn adds to its direct consumptive value.