Aliens in the nursery: assessing the attitudes of nursery managers to invasive species regulations
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The horticultural industry is recognised as a major pathway for the introduction and spread of invasive alien plants (IAPs). The Conservation of Agricultural Resources Act (CARA) of 1983 (Act No. 43 of 1983) listed and categorised invasive species with an aim to curb their spread. The more recently enacted Alien and Invasive Species Regulations under South Africa’s National Environmental Management: Biodiversity Act (NEMBA) are intended, in part, to improve controls on the horticultural industry’s role in the spread of IAPs. In order to assess, and enhance, the likely effectiveness of NEMBA, it is important to build an understanding of stakeholders’ awareness and attitudes towards the control of IAPs and associated regulatory policies. A two-pronged approach—involving nursery manager interviews (n = 30) and plant stock audit assessments (n = 41)—was used to gauge the awareness, compliance and attitudes of nursery managers towards both the CARA and NEMBA invasive species regulations. Less than ten percent of audited nurseries were fully compliant with the NEMBA regulations, and over 50% were stocking IAPs that have been regulated for at least 13 years under CARA. This is despite high levels of awareness (70%) about the CARA regulations reported in the interviews. The majority (73.5%) of IAP species stocked in nurseries were NEMBA category 1b invaders such as Nerium oleander and Canna indica. These are widespread and well-established invaders that require compulsory control under NEMBA. Half of the managers were not aware that the NEMBA regulations had been promulgated, but most respondents nevertheless reported being enthusiastic about compliance. Several factors were quoted as constraints on compliance by the industry. These included a perceived lack of enforcement, weak communication from government, and the lack of inclusion of the industry in the regulatory process. Suggested interventions that could enhance the impact of IAP regulations will involve improving the user-friendliness of the regulations, and supplementing the current top-down approach to regulation with an inclusive partner-centred approach.
KeywordsCompliance Invasive species Legislation Ornamental horticulture Perceptions
The authors are grateful to the following people for their assistance and support: Katya Mauff for statistical assistance; Ariella Rink and Lukas Otto for assistance with data collection; Ana Novoa, Guy Preston and Kay Montgomery for advice and insight with the project design; and Ernita Van Wyk for useful comments on the manuscript. HK acknowledges support from the Working for Water (WfW) Programme of the South African Department of Environmental Affairs, through the South African National Biodiversity Institute Invasive Species Programme. Lastly, we thank the nursery managers who agreed to participate in this study and took the time to respond to the questionnaire.
Compliance with ethical standards
This research was approved by the University of Cape Town Faculty of Science’s Research Ethics Committee (7 October 2014, FSREC 074).
Conflict of interest
The authors declare that they have no conflict of interest.
Prior to being interviewed, participants were provided with an informed consent letter, detailing the content of the interview, how the information would be used and assurances that strict confidentiality would be preserved.
- Abdi H, Valentin D (2007) Multiple correspondence analysis. In: Salkind N (ed) Encyclopedia of measurement and statistics. Sage, Thousand Oaks, pp 651–657Google Scholar
- Badenhorst AB (2011) An investigation into the compliance of selected nurseries and garden centres within Kwazulu-Natal Ethekwini and the Umsunduzi geographical regions, with the Conservation of Agricultural Resources Act 1983 (Act no. 43 of 1983) CARA and the National Environmental Management: Biodiversity Act 2004 (Act no. 10 of 2004) NEMBA. Dissertation, University of South AfricaGoogle Scholar
- Crompton T, Weinstein N, Sanderson B, Kasser T, Maio G, Henderson S (2014) No cause is an island: how people are influenced by values regardless of the cause. Common Cause Foundation, LondonGoogle Scholar
- Dehnen-Schmutz K, Touza J (2008) Plant invasions and ornamental horticulture: pathway, propagule pressure and the legal framework. Floric Ornam Plant Biotechnol 5:15–21Google Scholar
- Husson F, Josse J, Lê S, Mazet J (2011) FactoMineR: multivariate exploratory data analysis and data mining with R. R package version 1.16Google Scholar
- Le Maitre DC, Mgidi TN, Schonegevel L, Nel J, Rouget M, Richardson DM, Midgley C (2004a) Plant invasions in South Africa, Lesotho and Swaziland: assessing the potential impacts of major and emerging plant invaders. CSIR Environmentek, StellenboschGoogle Scholar
- Le Maitre DC, Richardson DM, Chapman RA (2004b) Alien plant invasions in South Africa: driving forces and the human dimension: working for water. S Afr J Sci 100(1 & 2):103–110Google Scholar
- Niemiera AX, Von Holle B (2009) Invasive plant species and the ornamental horticulture industry. In: Management of invasive weeds, pp 167–187. Springer, NetherlandsGoogle Scholar
- Paterson AR (2006) Clearing a path towards effective alien invasive control: the legal conundrum. Potchefstroom Electron Law J 9(1):1–56Google Scholar
- Reaser JK (2001) Invasive alien species prevention and control: the art and science of managing people. In: McNeely JA (ed) The great reshuffling: human dimensions of invasive alien species. IUCN, Cambridge, pp 5–20Google Scholar
- Richardson DM, Cambray JA, Chapman RA, Dean WRJ, Griffiths CL, Le Maitre DC, Newton DJ, Winstanley TJ (2003) Vectors and pathways of biological invasions in South Africa: past, present and future. In: Ruiz G, Carlton J (eds) Invasive species. Vectors and management strategies. Island Press, Washington, pp 292–349Google Scholar