Biological Invasions ( IF 2.9 ) Pub Date : 2020-08-20 , DOI: 10.1007/s10530-020-02337-y Ashley Montagu , Katie Robinson , Ann Noack , Helen Nahrung , Simon Lawson , Nathan Lo
The bronze bug, Thaumastocoris peregrinus, is an endemic Australian eucalypt pest that has become a serious threat to the global forestry industry. Following a large outbreak within its native range in 2002, introduced populations of the bronze bug appeared in South Africa and Argentina. Since then, T. peregrinus has spread rapidly around the world, with the number of reported incursions increasing steadily. Despite the problems posed by the bronze bug, little is known about its global invasion pathways. In this study, we used multiple different population genetic methods to (1) gain new insight into aspects of bronze bug population history within Australia, and (2) characterise the spread of the bronze bug throughout South America, South Africa, New Zealand and the Mediterranean Basin. Taken together, the genetic data and the outbreak records suggest that, across the international regions surveyed, at least three separate introductions of T. peregrinus from Australia have occurred over the decade 2003–2012—one into South Africa, another into Argentina and a third into New Zealand—each of which is likely to have originated in Sydney. Populations in Europe and Israel appear to have become established from individuals introduced from South America, rather than from within the native Australian range, suggesting the existence of a bridgehead effect. These findings provide an important framework for understanding the global spread of invasive bronze bug populations. They may be used to inform management decisions and improve the effectiveness of control strategies.
中文翻译:
澳大利亚桉树的一种侵入性害虫百脉藻(Thaustostorisris peregrinus)的全球入侵途径
青铜臭虫Thaumastocoris peregrinus是澳大利亚特有的桉树害虫,已严重威胁全球林业。继2002年在其本国范围内发生大规模疫情后,南非和阿根廷出现了引入的青铜虫种群。从那时起,百日草已在全世界范围内迅速蔓延,所报告的入侵数量稳步增加。尽管青铜虫造成了许多问题,但对其全球入侵途径知之甚少。在这项研究中,我们使用了多种不同的种群遗传方法(1)对澳大利亚境内青铜虫种群历史的各个方面有了新的认识,并且(2)表征了青铜虫在南美,南非,新西兰和新西兰的分布。地中海盆地。综合起来,遗传数据和暴发记录表明,在接受调查的国际区域中,至少有三个单独引入的百日草在2003-2012年这十年间,来自澳大利亚的移民者-一个进入南非,另一个进入阿根廷,第三次进入新西兰-每个都可能起源于悉尼。欧洲和以色列的人口似乎是从南美洲引进的人建立的,而不是从澳大利亚本土范围内建立的,这表明存在桥头效应。这些发现为理解入侵性青铜虫种群的全球传播提供了重要的框架。它们可用于告知管理决策并提高控制策略的有效性。