ITEM VIEW

Changes in the composition and distribution of alien plants in South Africa : an update from the Southern African Plant Invaders Atlas

dc.contributor.authorHenderson, Lesleyen_ZA
dc.contributor.authorWilson, John R. U.en_ZA
dc.date.accessioned2018-07-26T10:25:39Z
dc.date.available2018-07-26T10:25:39Z
dc.date.issued2017
dc.identifier.citationHenderson, L. & Wilson, J. R. U. 2017. Changes in the composition and distribution of alien plants in South Africa : an update from the Southern African Plant Invaders Atlas. Bothalia - African Biodiversity and Conservation, 47(2): a2172, doi:10.4102/abc.v47i2.2172
dc.identifier.issn2311-9284 (online)
dc.identifier.issn0006-8241 (print)
dc.identifier.otherdoi:10.4102/abc.v47i2.2172
dc.identifier.urihttp://hdl.handle.net/10019.1/104198
dc.descriptionCITATION: Henderson, L. & Wilson, J. R. U. 2017. Changes in the composition and distribution of alien plants in South Africa : an update from the Southern African Plant Invaders Atlas. Bothalia - African Biodiversity and Conservation, 47(2): a2172, doi:10.4102/abc.v47i2.2172.
dc.descriptionThe original publication is available at http://abcjournal.org
dc.description.abstractBackground: Data on alien species status and occurrence are essential variables for the monitoring and reporting of biological invasions. The Southern African Plant Invaders Atlas (SAPIA) Project has, over the past 23 years, atlassed alien plants growing outside of cultivation. Objectives: To document changes in the alien plant taxa recorded in SAPIA, assess trends in invasive distributions and explore effects of management and regulations. Method: The numbers of alien plant taxa recorded were compared between May 2006 and May 2016, and changes in the extent of invasions at a quarter-degree squares (qds) scale were compared between 2000 and 2016. The effectiveness of regulations and interventions was assessed in terms of the relative change in the extent of invasions. Results: As of May 2016, SAPIA had records for 773 alien plant taxa, an increase of 172 since 2006. Between 2000 and 2016, the number of qds occupied by alien plants increased by ~50%, due both to ongoing sampling and to spread. Successful classical biological control programmes have reduced the rate of spread of some taxa and in a few cases have led to range contractions. However, other interventions had no detectable effect at a qds scale. Conclusions: South Africa has a growing number of invasive alien plant species across an increasing area. More taxa should be listed under national regulations, but ultimately more needs to be done to ensure that management is strategic and effective. SAPIA is a valuable tool for monitoring alien plant status and should be developed further so that invasions can be accurately tracked over time.en_ZA
dc.description.urihttps://abcjournal.org/index.php/abc/article/view/2172
dc.format.extent26 pages
dc.language.isoen_ZAen_ZA
dc.publisherAOSIS Publishing
dc.subjectAlien plantsen_ZA
dc.titleChanges in the composition and distribution of alien plants in South Africa : an update from the Southern African Plant Invaders Atlasen_ZA
dc.typeArticleen_ZA
dc.description.versionPublisher's version
dc.rights.holderAuthors retain copyright


Files in this item

Thumbnail
Thumbnail

This item appears in the following Collection(s)

ITEM VIEW