Invasion of American native lily populations by an alien beetle
Invasion of American native lily populations by an alien beetle
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DOI：
10.1007/s10530-007-9211-0
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发表时间：
2008-12-01
影响因子：
2.9
通讯作者：
Brodeur, Jacques
中科院分区：
文献类型：
--
作者：
Bouchard, Anne-Marie;McNeil, Jeremy N.;Brodeur, Jacques
百合叶甲虫 (Lilioceris lilii) 原产于欧亚大陆，1943 年首次在北美的加拿大魁北克省蒙特利尔岛上发现。种群数量仍仅限于最初的引入地点，但自 1978 年以来，该物种的分布已向各个方向扩展。迄今为止，仅在城市和农村地区有记录称Lilii以栽培的百合为食。但随着甲虫扩大其地理范围，它可能会遇到本地的百合物种。本研究的目的是确定两种北美本土百合品种（加拿大百合和费城百合）作为百合百合宿主的适宜性，并评估野生百合种群的侵染程度。实验室条件下适应性参数（存活、发育时间、大小）的测量表明，L. lilii 具有在两种本土百合上发育的能力。在魁北克省和安大略省，采样的 20 个加拿大乳杆菌野生种群中有 8 个受到感染。相比之下，L. philadelphicum 没有受到外来甲虫的攻击。北美的许多本土百合已经濒临灭绝，因此迫切需要解决百合对自然生态系统的生态影响。
The lily leaf beetle (Lilioceris lilii), indigenous to Eurasia, was first detected in North America on the island of Montreal, Quebec, Canada in 1943. Populations remained limited to the original site of introduction but since 1978 the distribution of this species has expanded in all directions. To date L. lilii has only been recorded feeding on cultivated lilies in urban and rural areas. But as the beetle spreads its geographic range it could encounter native lily species. The objectives of this study were to determine the suitability of two indigenous North American lily species (Lilium canadense and L. philadelphicum) as host for L. lilii, and to assess the degree of infestation of wild lily populations. Measurement of fitness parameters under laboratory conditions (survival, development time, size) indicated that L. lilii has the capacity to develop on both species of native lilies. In the provinces of Quebec and Ontario eight of the 20 wild populations of L. canadense sampled were infested. In contrast, L. philadelphicum was not attacked by the alien beetle. A number of native lilies are already endangered in North America, so there is an urgent necessity to address the ecological impact of L. lilii in natural ecosystems.