Current Status of Biological Control of Lantana camara L. (sensu lato) in South Africa

Simelane, David O.; Katembo, Naweji; Mawela, K.V.

doi:10.4001/003.029.0775

Cited by 11 publications

(3 citation statements)

References 31 publications

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“…There are uncertainties around the outcome of Lantana management. There is exhaustive literature detailing various control measures of Lantana, such as (i) classical biological control (Katembo et al, 2020;Simelane et al, 2021), (ii) chemical control (Erasmus & Clayton, 1992;Graaff, 1986;Swarbrick et al, 1995), (iii) mechanical control, (iv) manual labour, (v) working animal and (vi) indigenous burning practices (Sundaram et al, 2012;Thekaekara et al, 2017). 13 However, the respondents opined that biological and chemical control of Lantana in the PAs is generally dissuaded in the NBR's PAs because of the perceived risk of such interventions.…”

Section: The Lantana Management Conundrummentioning

confidence: 99%

Archetypal representations of dilemmas concerning invasive alien species management—A case of invasive Lantana camara in the protected areas of Nilgiri Biosphere Reserve, India

Hariharan,

Ganesh,

Vijayalakshmi

et al. 2024

Syst Res Behav Sci

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This multi‐site case study on the invasive alien plant Lantana camara in protected areas of Nilgiri Biosphere Reserve, India, addresses the reasons for inadequate institutional responses from stakeholders in managing the species despite the seriousness. The study uses thematic analysis and qualitative systems approach. The themes are converted into a qualitative‐system‐dynamics model and are then abstracted into system archetypes. The study identified three major themes: the dilemma involving stakeholders, the dilemma of alternative and commercial use of Lantana, and the Lantana management conundrum. The study translated these dilemmas into four generalisable archetypes: ‘drifting goals’, ‘modified‐shifting‐the‐burden’, ‘fixes‐that‐fail’ and ‘substitution rebound’. The latest is a novel contribution to the systems literature. Practically, the study helps understand the recurring undesired behavioural patterns in invasive species management and suggests policy and governance changes to tackle them. The study also points towards building stakeholder relationship protocols, focussing on fundamental solutions and having clear Lantana management targets.

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Section: The Lantana Management Conundrummentioning

confidence: 99%

Archetypal representations of dilemmas concerning invasive alien species management—A case of invasive Lantana camara in the protected areas of Nilgiri Biosphere Reserve, India

Hariharan,

Ganesh,

Vijayalakshmi

et al. 2024

Syst Res Behav Sci

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“…South African examples of weed growth level post-release evaluations include assessing the combined impact of all 16 biocontrol agents established on Lantana camara L. (Verbanaceae) by excluding the biocontrol agents from plots with insecticides. An overview and update of these studies is provided in a review of the biocontrol programme against L. camara (Simelane et al 2021). Leaf damage was 44% greater in plots with agents and side-stem production was reduced by 16% in dry areas of the country (Katembo et al 2020), while seed production was reduced by 94% in a similar study conducted in wetter areas (Mukwevho et al 2017).…”

Section: Weed Growthmentioning

confidence: 99%

Recent post-release evaluations of weed biocontrol programmes in South Africa: a summary of what has been achieved and what can be improved

Paterson,

Motitsoe,

Coetzee

et al. 2023

BioControl

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Biocontrol is widely considered an effective management solution for mitigating the negative impacts of invasive alien plants (weeds). Globally, post-release evaluations to assess individual biocontrol programmes are generally lacking and there have been persistent calls within the biocontrol of weeds literature to increase the quantity and quality of post-release evaluation studies. South African biocontrol researchers have prioritised post-release evaluation studies, with a significant proportion of funding dedicated to this purpose. In this study we review post-release evaluations of weed biocontrol programmes in South Africa that have been published in the last ten years, discuss the different ways these evaluations have been conducted, and identify gaps for future research. Post-release evaluations have been conducted at different scales, including physiological changes within individual plants, plant growth parameters, plant population dynamics and landscape level changes. In most cases, the results of these studies indicated that biocontrol has reduced invasions according to these metrics. While the reduction in the invasion is assumed to alleviate negative ecological and socio-economic impacts, this is usually not directly measured. Evaluations of the socio-economic and ecosystem level benefits of biocontrol were limited to just a few examples on aquatic weeds. More studies that investigate the landscape, socio-economic and ecosystem level changes due to biocontrol are required, especially for terrestrial weeds, if the true scale of the benefits provided by biocontrol are to be understood.

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“…al. 2012,Simelane et al 2021). For example, L. camara was estimated to have invaded 2.2 million hectares in South Africa by the 1980s(Bhagwat et al 2012).…”

mentioning

confidence: 99%

Gauging the threat of invasive species to UNESCO World Heritage Sites relative to other anthropogenic threats.

Cadotte,

Alabbasi,

Akib

et al. 2024

Preprint

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There are 230 UNESCO World Heritage Sites that were designated based on their important natural features. These represent some of the most iconic and important natural places on Earth, with immense value for biodiversity conservation, ecosystem service supply and cultural well-being. Many of these sites are degraded by anthropogenic drivers, including socioeconomic factors (population growth, poverty and tourism), extractive activities (logging, mining, and hunting), external threats (fire, climate change, land-use change, pollution), and biological threats (disease and invasive species). Of these, invasive species remain one of the most problematic for management, and once introduced, populations can grow exponentially and spread to other locations even when actively managed. Given the economic and environmental threats imposed by invasive species, we asked how they compare to the other anthropogenic threats. We reviewed the primary literature for each World Heritage Site and scored the prevalence of 12 different anthropogenic drivers. We found that invasive species rank as one of the most frequently identified threats and pose the greatest degree of concern compared to all other threats, on par with the threat from pollution and greater than logging, land-use change and climate change. We compared our scoring, based on review of the literature, with that of the UNESCO and IUCN monitoring reports. Although there was general agreement between these two assessments, the literature provided information on 55 sites not included in the monitoring reports. We further examine the invasive species examined in the articles and the degree of their perceived impacts on biodiversity, habitat, rare species, ecosystem function, tourism, and economic impacts. It is important that invasive species are well monitored and managed in WHSs to reduce their impacts and meet policy mandated targets and conservation goals.

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Current Status of Biological Control of Lantana camara L. (sensu lato) in South Africa

Cited by 11 publications

References 31 publications

Archetypal representations of dilemmas concerning invasive alien species management—A case of invasive Lantana camara in the protected areas of Nilgiri Biosphere Reserve, India

Archetypal representations of dilemmas concerning invasive alien species management—A case of invasive Lantana camara in the protected areas of Nilgiri Biosphere Reserve, India

Recent post-release evaluations of weed biocontrol programmes in South Africa: a summary of what has been achieved and what can be improved

Gauging the threat of invasive species to UNESCO World Heritage Sites relative to other anthropogenic threats.

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