Assessing the effectiveness of invasive alien plant management in a large fynbos protected area
Bothalia - African Biodiversity & Conservation
| Field | Value | |
| Title | Assessing the effectiveness of invasive alien plant management in a large fynbos protected area | |
| Creator | Kraaij, Tineke Baard, Johan A. Rikhotso, Diba R. Cole, Nicholas S. van Wilgen, Brian W. | |
| Description | Background: Concern has been expressed about the effectiveness of invasive alien plant (IAP) control operations carried out by Working for Water (WfW). South African legislation now also requires reporting on the effectiveness of IAP management interventions. Objectives: We assessed the effectiveness of IAP management practices in a large fynbos protected area, the Garden Route National Park, South Africa. Methods: We undertook field surveys of pre-clearing IAP composition and the quality of treatments applied by WfW during 2012–2015 in 103 management units, covering 4280 ha. We furthermore assessed WfW data for evidence of change in IAP cover after successive treatments, and adherence to industry norms. Results: Despite the development of detailed management plans, implementation was poorly aligned with plans. The quality of many treatments was inadequate, with work done to standard in only 23% of the assessed area. Problems encountered included (1) a complete absence of treatment application despite the payment of contractors (33% of assessed area); (2) treatments not being comprehensive in that select areas (38%), IAP species (11%) or age classes (8%) were untreated; (3) wrong choice of treatment method (9%); and (4) treatments not applied to standard (7%). Accordingly, successive follow-up treatments largely did not reduce the cover of IAPs. Inaccurate (or lack of) infield estimation of IAP cover prior to contract generation resulted in erroneous estimation of effort required and expenditure disparate with WfW norms. Conclusions: We advocate rigorous, compulsory, infield assessment of IAP cover prior to contract allocation and assessment of the quality of treatments applied prior to contractors’ payment. This should improve the efficiency of control operations and enable tracking of both the state of invasions and effectiveness of management. | |
| Publisher | AOSIS | |
| Date | 2017-03-31 | |
| Identifier | 10.4102/abc.v47i2.2105 | |
| Source | Bothalia; Vol 47, No 2 (2017); 11 pages 2311-9284 0006-8241 | |
| Language | eng | |
| Relation |
The following web links (URLs) may trigger a file download or direct you to an alternative webpage to gain access to a publication file format of the published article:
https://journals.abcjournal.aosis.co.za/index.php/abc/article/view/2105/2179
https://journals.abcjournal.aosis.co.za/index.php/abc/article/view/2105/2178
https://journals.abcjournal.aosis.co.za/index.php/abc/article/view/2105/2180
https://journals.abcjournal.aosis.co.za/index.php/abc/article/view/2105/2133
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