Prioritization of alien plant targets for biological control in South Africa's offshore sub-Antarctic islands

IF 1.8 4区 地球科学 Q3 ENVIRONMENTAL SCIENCES Antarctic Science Pub Date : 2023-07-12 DOI:10.1017/s0954102023000135
K. Canavan, I. Paterson
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Abstract

Invasive alien plants (IAPs) are a significant threat to the biodiversity and ecological functioning of the sub-Antarctic Prince Edward Islands (PEIs); however, weed biological control has not yet been implemented as a management tool. The PEIs have had 23 alien plants recorded, of which several are considered beyond eradication and therefore could benefit from the release of safe and effective biocontrol agents. We used the South African Biological Control Target Selection (BCTS) system to provide a ranked list of the target species in order of priority for further biocontrol research. The highest-scoring species, and therefore those that should be considered first to be targeted, were Sagina procumbens and Cerastium fontanum. No biocontrol agents for IAPs have been released in any climate with as consistent low temperatures as in the PEIs, so the climatic compatibility of agents will be essential prior to any decision to release. However, with very few native species present on the PEIs, the programmes would involve limited host specificity testing, which would improve the feasibility and speed with which new biocontrol agents could be developed. Biocontrol may offer an environmentally safe and sustainable method of reducing the negative impacts of these priority species and thus warrants further investigation.
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南非近海亚南极岛屿生物控制外来植物目标的优先次序
外来入侵植物对亚南极爱德华王子群岛的生物多样性和生态功能构成重大威胁;然而,杂草生物防治尚未作为一种管理工具得到实施。PEI记录了23种外来植物,其中一些被认为是无法根除的,因此可以从安全有效的生物防治剂的释放中受益。我们使用南非生物控制目标选择(BCTS)系统,按照优先顺序提供了目标物种的排名列表,以供进一步的生物控制研究。得分最高的物种,也就是那些应该首先被视为目标的物种,是前伞骨和方角角Cerastium fontanum。IAP的生物控制剂在任何气候下都没有像PEI中那样持续低温释放,因此在决定释放之前,制剂的气候兼容性至关重要。然而,由于PEI上的本土物种非常少,这些计划将涉及有限的宿主特异性测试,这将提高开发新生物防治剂的可行性和速度。生物防治可以提供一种环境安全和可持续的方法来减少这些优先物种的负面影响,因此值得进一步研究。
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来源期刊
Antarctic Science
Antarctic Science 地学-地球科学综合
CiteScore
3.60
自引率
6.20%
发文量
42
审稿时长
3 months
期刊介绍: Antarctic Science provides a truly international forum for the broad spread of studies that increasingly characterise scientific research in the Antarctic. Whilst emphasising interdisciplinary work, the journal publishes papers from environmental management to biodiversity, from volcanoes to icebergs, and from oceanography to the upper atmosphere. No other journal covers such a wide range of Antarctic scientific studies. The journal attracts papers from all countries currently undertaking Antarctic research. It publishes both review and data papers with no limits on length, two-page short notes on technical developments and recent discoveries, and book reviews. These, together with an editorial discussing broader aspects of science, provide a rich and varied mixture of items to interest researchers in all areas of science. There are no page charges, or charges for colour, to authors publishing in the Journal. One issue each year is normally devoted to a specific theme or papers from a major meeting.
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