JUser: :_load: Unable to load user with ID: 504


Thank you for visiting our website.

Please note that the site is not fully functional at the moment as we are in the process of re-developing. We hope that you will find the available resources helpful in the meantime.

German wasp | Vespula germanica

German wasp

Vespula germanica

Coral bush | Ardisia crenata

Coral bush

Ardisia crenata

Purple loosestrife | Lythrum salicaria

Purple loosestrife

Lythrum salicaria

Pom pom weed | Campuloclinium macrocephalum

Pom pom weed

Campuloclinium macrocephalum

Canarybird bush | Crotalaria agatiflora

Canarybird bush

Crotalaria agatiflora

Peanut butter cassia | Senna didymobotrya

Peanut butter cassia

Senna didymobotrya

Rubber vine | Cryptostegia grandiflora

Rubber vine

Cryptostegia grandiflora

1 2 3 4 5 6 7

Environmental Programmes

In order to tackle our country’s socio-economic challenges, the government adopted the Outcomes based approach to improve government performance and providing focus on service delivery. find out more

Assessing the effectiveness of invasive alien plant management in a large fynbos protected area

Assessing the effectiveness of invasive alien plant management in a large fynbos protected area
Tineke Kraaij1, Johan A. Baard2, Diba R. Rikhotso2, Nicholas Cole3, Brian W. van Wilgen4
1 Nelson Mandela Metropolitan University, School of Natural Resource Management – Nature Conservation, Private Bag X6531, George, 6530
2 South African National Parks, Garden Route Scientific Services, P.O. Box 3542, Knysna, 6570
3 South African National Parks, Biodiversity Special Projects, Private Bag X6531, George, 6530, South Africa
4 Centre for Invasion Biology, Department of Botany and Zoology, Stellenbosch University, Private Bag X1, Matieland, 7602

Concern has been expressed about the effectiveness of invasive alien plant (IAP) control operations of Working for Water (WfW). Recommended remedial measures included improved planning and prioritisation, and efficiency and professionalism of operations. We assessed the effectiveness of IAP management practices in a large fynbos protected area, the Garden Route National Park. We found that although substantial effort was invested in sound planning and prioritisation, implementation was poorly aligned with plans. Field surveys in 103 management units (4280 ha) suggested that the general quality of treatments was poor, with work done to standard in only 23% of the area. Deviations from acceptable work standards included a complete absence of work despite payment of contractors (occurring in 33% of assessed area), partial work done (38%), not all the IAP species (11%) or age classes (8%) present being treated, wrong choice of treatment method (9%), and treatments not being applied to standard (7%). Field surveys and interrogation of WfW’s database suggested that inaccurate (or lack of) in-field estimation of IAP cover prior to contract generation resulted in erroneous estimation of effort required, and expenditure disparate with industry norms. Successive follow-up treatments furthermore did not necessarily effect reductions in IAP infestations. We advocate rigorous, compulsory, in-field assessment of IAP cover prior to contract allocation, and assessment of the quality of treatments applied prior to contractor payment. In line with legislative requirements, this will enable tracking of both the state of invasions and the effectiveness of interventions, and improve the efficiency of control operations.

Read 3101 times Last modified on Tuesday, 03 May 2016 12:10

General News Updates

2019 National Symposium on Biological Invasio…


This is your invitation to South Africa's 2019 National Symposium on Biological Invasions. The convention is hosted by the Centre for Invasion Biology (CIB), University of Stellenbosch, and the Biolo... Read more

2019 Invasive Species Training


During the past five years (2014-2018), ISSA invasive species trainers have trained 4 000 in the identification of invasive species and laws pertaining to invasive species across South Africa.  ... Read more

Alien Grass Working Group


Who are we? The South African National Alien Grass Working Group was jointly initiated by the South African Biodiversity Institute (SANBI) and the Centre for Excellence in Invasion Biology (C·I·B) in... Read more

Permits for planting indigenous Cynodon?


On 16 February, 2018, South Africa's Department of Environmental Affairs issued amendments to the regulations and lists relating to the National List of Invasive Species.  Updates to the draft&n... Read more

Invasive species training 2018 dates released


Interested in invasive species?  How much do you know about NEMBA invasive species compliance for landowners and organs of state? The South African Green Industries Council (SAGIC) have released... Read more

Communications post for Africa advertised


The Nature Conservancy has advertised a brand new post:  Communications Manager, Africa Region. Knowledge of invasive species and water would be an asset in this post. See details below:    Job Titl... Read more