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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

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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

Identifying priority areas for active restoration after alien plant clearance in the City of Cape Town

Identifying priority areas for active restoration after alien plant clearance in the City of Cape Town
Elana Mostert1, Mirijam Gaertner1, Patricia M. Holmes2, David M. Richardson1
1Centre  for  Invasion  Biology,  Stellenbosch  University;  2Environmental  Resource  Management Department, City of Cape Town

Invasion by alien species is a worldwide conservation problem, posing the second largest threat to biodiversity. Invasive alien plants (IAP) have a range of negative impacts: transforming ecosystems, reducing biodiversity and compromising on the delivery of ecosystem functions and services. Management interventions, such as restoration, could alleviate some of these negative impacts. Passive restoration consists of the clearance of IAP but is often not sufficient for ecosystem recovery, hence the need for a more pro-active approach of active restoration, e.g. re-introduction of native species, in some instances. As restoration is a resource intensive budget-limited process; one needs to distinguish between areas needing passive or active management, and also prioritize areas to ensure efficiency and effectiveness. The fynbos biome in South Africa is one of the most invaded biomes in the country, and for which there has not yet been any regional prioritization of areas for restoration after IAP clearance. The aim of this study is two-fold, firstly to develop and illustrate a framework to distinguish between areas in need of active and passive restoration in the City of Cape Town and secondly, to prioritize restoration areas. A multi-scale approach will be used to identify and prioritize areas for restoration. At a large city scale, the ecosystem threshold concept will be applied, using ecological information and GIS. At a smaller catchment scale a novel ecosystem approach will be developed combining field sampling along with GIS. This study will be of particular value to land managers, conservationists and city planners.

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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