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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

A global assessment of invasiveness in Araceae: is there a general suite of invasive traits?

A global assessment of invasiveness in Araceae: is there a general suite of invasive traits?
Desika Moodley1,2,3, Şerban Procheş1, John R. Wilson2,3
1School of Environmental Sciences, University of  KwaZulu-Natal; 2Invasive Species ProgrammeSANBI; 3Centre for Invasion Biology, Stellenbosch University

Significant progress has  been made in understanding biological invasions, with one  of  the key findings being that the determinants of naturalization and invasion success vary from group to group. Here we explore these issues for the Araceae. We determine which species have been introduced outside their native ranges, the pathways of introduction, and which traits separate those species that have been introduced from those that are known to become invasive. To do this we first developed a database of  species  that  have  been  introduced worldwide using  online databases (e.g.  Global Invasive Species Database and the Global Biodiversity Information Facility) and literature sources (e.g. New Zealand Naturalised vascular plant checklist and Aroideana). We analysed various explanatory variables (e.g. traits associated with morphology, reproduction and distribution) using regression techniques. We then used morphological traits to build a phylogenetic tree showing clades defined by the characters identified as key for invasiveness. This can be used to predict potentially invasive species. Results are discussed in terms of traits that confer invasiveness on a global scale and which are potentially useful for screening taxa. Araceae provide an excellent study group for identifying determinants of invasiveness in herbaceous plants, since this is one of the largest plant families in the world, and among the most popular with horticulturalists, with species occupying various habitats. One of our future aims is to conduct risk assessments using single species and provide management recommendations, and as such we would greatly appreciate locality records of Epipremnum aureum.

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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