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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

The role of molecular ecology in an invaded South Africa and its importance for biocontrol using Tamarix as a case study

The role of molecular ecology in an invaded South Africa and its importance for biocontrol using Tamarix as a case study
Samalesu G. MAYONDE1, Glynis V. Cron1, Kelsey Glennon1, Marcus J. Byrne1,2
1School of Animal Plant and Environmental Sciences, University of the Witwatersrand, Private Bag X3
2Centre for Invasion Biology

 The use of molecular techniques in invasion biology is regarded by many as a fairly new approach. Current research uses genetic tools to better understand the histories, processes and effects of plant invasions which are critical to improving control success of these organisms. The role of this presentation is to provide an overview of how molecular techniques can be used to aid the management of alien invasive plants in South Africa. Tamarix species are known to have considerable morphological and ecological similarities which generate confusion when trying to identify them morphologically. Genetic analyses identified three species of Tamarix in South Africa with hybrids between all the parental species, removing the taxonomic confusion. Further analyses examining the intraspecific genetic diversity showed that 64% of Tamarix invasion is hybrids. Hybridization and introgression are known to be a significant component of Tamarix invasion as they increased genetic diversity, generated potential successful novel genotypes and can swamp the native T. usneoides gene pool, all of which can be a limiting factor to biocontrol, i.e., the hybridization in Knapweed. Molecular techniques have many applications in biocontrol and invasion biology. These include instances where source populations of pompom weed in South Africa were identified; tracking of introduction routes of pompom weed and Tamarix in South Africa; and elucidating mechanisms of local spread and adaptations. All of these can be invaluable for host specificity testing of potential agents for biocontrol of existing invasive plants. 

Read 2827 times Last modified on Tuesday, 03 May 2016 12:24

General News Updates

2019 National Symposium on Biological Invasio…

26-02-2019

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

22-01-2019

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

04-09-2018

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?

01-03-2018

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

28-02-2018

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

25-01-2018

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