dc.contributor.author |
Crookes, DJ
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|
dc.contributor.author |
Blignaut, JN
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|
dc.contributor.author |
Le Maitre, David C
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|
dc.date.accessioned |
2021-02-09T08:41:30Z |
|
dc.date.available |
2021-02-09T08:41:30Z |
|
dc.date.issued |
2020-11 |
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dc.identifier.citation |
Crookes, D., Blignaut, J. & Le Maitre, D.C. 2020. The effect of accessibility and value addition on the costs of controlling invasive alien plants in South Africa: A three-species system dynamics model in the fynbos and grassland biomes. <i>Southern Forests: A Journal of Forest Science.</i> http://hdl.handle.net/10204/11730 |
en_ZA |
dc.identifier.uri |
http://hdl.handle.net/10204/11730
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|
dc.description.abstract |
We developed a two-biome (grasslands and fynbos) system dynamics model simulating invasions of three invasive alien plant species – black wattle (Acacia mearnsii) and two pine species (Pinus patula and Pinus pinaster) – and some of the consequences. The model considers three components: invasion dynamics; revenue from the sale of woody products derived from clearing invasive alien plants; and a coefficient that models the effect of increased accessibility to invaded areas. The model shows that increasing the returns on value added products (VAPs) from invasive alien plants (IAPs) by between 70% and 130% results in positive nett present values (NPVs) of R2.7 million for P. patula, R151.7 million for P. pinaster and R115.9 million for A. mearnsii (1996 base year). At the same time, the invasion of these species is reduced dramatically by 2025. The results show that there is much scope, and indeed a clear requirement, for improved returns on investment from harvesting these species through increasing the returns from VAPs. However, accessibility to invaded areas would need to be increased for positive nett gains in water yields and other returns to be maximised. |
en_US |
dc.format |
Abstract |
en_US |
dc.language.iso |
en |
en_US |
dc.relation.uri |
https://www.tandfonline.com/doi/abs/10.2989/20702620.2019.1686685 |
en_US |
dc.relation.uri |
https://doi.org/10.2989/20702620.2019.1686685 |
en_US |
dc.relation.uri |
2070-2620 |
en_US |
dc.relation.uri |
2070-2639 |
en_US |
dc.source |
Southern Forests: A Journal of Forest Science |
en_US |
dc.subject |
A. mearnsii |
en_US |
dc.subject |
Clearing |
en_US |
dc.subject |
P. patula |
en_US |
dc.subject |
P. pinaster |
en_US |
dc.subject |
Value-added products |
en_US |
dc.title |
The effect of accessibility and value addition on the costs of controlling invasive alien plants in South Africa: A three-species system dynamics model in the fynbos and grassland biomes |
en_US |
dc.type |
Article |
en_US |
dc.description.pages |
125-134 |
en_US |
dc.description.note |
Due to copyright restrictions, the attached pdf contains the abstract version of the item. |
en_US |
dc.description.cluster |
Smart Places |
en_US |
dc.description.impactarea |
Biodiversity & Ecosystem Services |
en_US |
dc.identifier.apacitation |
Crookes, D., Blignaut, J., & Le Maitre, D. C. (2020). The effect of accessibility and value addition on the costs of controlling invasive alien plants in South Africa: A three-species system dynamics model in the fynbos and grassland biomes. <i>Southern Forests: A Journal of Forest Science</i>, http://hdl.handle.net/10204/11730 |
en_ZA |
dc.identifier.chicagocitation |
Crookes, DJ, JN Blignaut, and David C Le Maitre "The effect of accessibility and value addition on the costs of controlling invasive alien plants in South Africa: A three-species system dynamics model in the fynbos and grassland biomes." <i>Southern Forests: A Journal of Forest Science</i> (2020) http://hdl.handle.net/10204/11730 |
en_ZA |
dc.identifier.vancouvercitation |
Crookes D, Blignaut J, Le Maitre DC. The effect of accessibility and value addition on the costs of controlling invasive alien plants in South Africa: A three-species system dynamics model in the fynbos and grassland biomes. Southern Forests: A Journal of Forest Science. 2020; http://hdl.handle.net/10204/11730. |
en_ZA |
dc.identifier.ris |
TY - Article
AU - Crookes, DJ
AU - Blignaut, JN
AU - Le Maitre, David C
AB - We developed a two-biome (grasslands and fynbos) system dynamics model simulating invasions of three invasive alien plant species – black wattle (Acacia mearnsii) and two pine species (Pinus patula and Pinus pinaster) – and some of the consequences. The model considers three components: invasion dynamics; revenue from the sale of woody products derived from clearing invasive alien plants; and a coefficient that models the effect of increased accessibility to invaded areas. The model shows that increasing the returns on value added products (VAPs) from invasive alien plants (IAPs) by between 70% and 130% results in positive nett present values (NPVs) of R2.7 million for P. patula, R151.7 million for P. pinaster and R115.9 million for A. mearnsii (1996 base year). At the same time, the invasion of these species is reduced dramatically by 2025. The results show that there is much scope, and indeed a clear requirement, for improved returns on investment from harvesting these species through increasing the returns from VAPs. However, accessibility to invaded areas would need to be increased for positive nett gains in water yields and other returns to be maximised.
DA - 2020-11
DB - ResearchSpace
DP - CSIR
J1 - Southern Forests: A Journal of Forest Science
KW - A. mearnsii
KW - Clearing
KW - P. patula
KW - P. pinaster
KW - Value-added products
LK - https://researchspace.csir.co.za
PY - 2020
T1 - The effect of accessibility and value addition on the costs of controlling invasive alien plants in South Africa: A three-species system dynamics model in the fynbos and grassland biomes
TI - The effect of accessibility and value addition on the costs of controlling invasive alien plants in South Africa: A three-species system dynamics model in the fynbos and grassland biomes
UR - http://hdl.handle.net/10204/11730
ER - |
en_ZA |
dc.identifier.worklist |
23953 |
|