Alnus glutinosa (Betulaceae) in South Africa : invasive potential and management options

dc.contributor.authorKeet, Jan-Hendrik
dc.contributor.authorRobertson, Mark P.
dc.contributor.authorRichardson, David M.
dc.date.accessioned2021-08-30T13:01:58Z
dc.date.issued2020-12
dc.description.abstractInvasive alien plants cause major environmental and economic impacts and preventing the establishment and spread of emerging invaders is crucial. Black Alder (Alnus glutinosa) is well established as a widespread invader in a number of countries, notably the USA and New Zealand, and was recently detected invading riparian ecosystems in South Africa's Western Cape Province. We review the introduction history, current distribution and invasion potential (via species distribution and risk analysis) of Black Alder in South Africa, collate information on its biology, environmental impacts and options for management from its native and invaded range, assess its potential range and management attempts in South Africa, and provide guidelines for effective management. Furthermore, correlative modelling predicted areas of the southern and eastern part of South Africa to have suitable environments for Black Alder establishment. However, water availability will likely limit the species to riparian areas, and areas where the annual rainfall exceeds 500 mm per annum. We estimated control costs to be minimum R 82 000 per month, and the vigorous resprouting nature of Black Alder and its riparian zone preferences presents large management challenges. We propose that Black Alder should be listed as Category 1a under the National Environmental Management: Biodiversity Act (NEMBA) in South Africa. We advise that riparian areas in particular be monitored closely to prevent Black Alder from becoming a widespread invader.en_ZA
dc.description.departmentZoology and Entomologyen_ZA
dc.description.embargo2021-09-17
dc.description.librarianhj2021en_ZA
dc.description.sponsorshipThe DSI-NRF Centre of Excellence for Invasion Biology and the Oppenheimer Memorial Trust.en_ZA
dc.description.urihttp://www.elsevier.com/locate/sajben_ZA
dc.identifier.citationKeet, J.-H., Robertson, M.P. & Richardson, D.M. 2020, 'Alnus glutinosa (Betulaceae) in South Africa: invasive potential and management options', South African Journal of Botany, vol. 135, pp. 280-293.en_ZA
dc.identifier.issn0254-6299 (print)
dc.identifier.issn1727-9321 (online)
dc.identifier.other10.1016/j.sajb.2020.09.009
dc.identifier.urihttp://hdl.handle.net/2263/81538
dc.language.isoenen_ZA
dc.publisherElsevieren_ZA
dc.rights© 2020 SAAB. Published by Elsevier B.V. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in South African Journal of Botany. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. A definitive version was subsequently published in South African Journal of Botany, vol. 135, pp. 280-293, 2020. doi : 10.1016/j.sajb.2020.09.009.en_ZA
dc.subjectBlack Alder (Alnus glutinosa)en_ZA
dc.subjectBiological invasionsen_ZA
dc.subjectInvasive alien plants (IAP)en_ZA
dc.subjectSpecies distribution modellingen_ZA
dc.subjectTree invasionsen_ZA
dc.titleAlnus glutinosa (Betulaceae) in South Africa : invasive potential and management optionsen_ZA
dc.typePostprint Articleen_ZA

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