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

National Invasive Alien Plant Survey

National Invasive Alien Plant Survey
Ian J.D.F. Kotzé¹, B. Hein Beukes¹,Terry S. Newby¹, Elna C. Van den Berg¹
¹ARC-Institute for Soil, Climate and Water, Private Bag X5017, Stellenbosch, 7599, South Africa *

The negative impact of Invasive Alien Plant (IAP) species on natural areas, but also on areas such as agricultural land has been extensively researched. Certain mitigation strategies and programmes have been put in place such as the internationally recognized Working for Water Programme. Such an initiative requires objectively determined spatial distribution data of IAP species at the required scale to allow for effective planning, implementation and future monitoring of IAP distribution changes.

The National Invasive Alien Plant Survey project was initiated by the Working for Water Programme and implemented by the Agricultural Research Council. The project objectives are to establish and implement a cost effective, objective and statistically sound IAP monitoring system for South Africa at a quaternary catchment level.

A complete inventory and a standard sampling approach, both have limitations, mainly due to the size of the study area (123 million hectares), variation in the natural environment and therefore the associated costs. An innovative sampling approach was required to meet the project aims. Sampling orientated along an environmentally variable gradient, that contributes the most to species occurrence, would detect the maximum variation in an area, therefore resulting in a stratified proportional sampling approach. A further riparian sample layer was allocated. A third regular grid point layer was created for selected quaternary catchments to serve as an independent source of verification.  Different field survey approaches were simulated and the most suitable was an aerial approach. An extensive field survey was conducted of the sample points. Field data was analyzed and the relevant IAP maps were produced.

Read 3963 times Last modified on Tuesday, 03 May 2016 12:26

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