Deloso Benjamin E, Terry L Irene, Yudin Lee S, Marler Thomas E
College of Natural and Applied Sciences, University of Guam, Mangilao, GU 96923, USA.
School of Biological Sciences, University of Utah, Salt Lake City, UT 84112, USA.
Insects. 2020 Dec 16;11(12):888. doi: 10.3390/insects11120888.
Invasions of non-native species can threaten native biodiversity, and island ecosystems are ideal for studying these phenomena. In this article, first, we report on the invasive species that combine to threaten the island cycad by reviewing the history of previously reported invasions and providing an update of recent invasions. Then, we prioritize the threat status of each herbivore and the interactions among them. Plant damage was initiated in 2003─2005 by the non-native Takagi armored scale, sp. Meyrick leaf miner, and Horsfield butterfly, which elicited unprecedented irruptions of the native Aurivillius stem borer and increased herbivory by feral pigs ( L.). The combined impact of these five consumers represents the greatest sustained threat to the cycad tree species. Mitigation of the damage caused by phytophagous non-native species is urgently needed to conserve this unique gymnosperm tree.
外来物种的入侵会威胁本地生物多样性，而岛屿生态系统是研究这些现象的理想场所。在本文中，首先，我们通过回顾先前报道的入侵历史并提供近期入侵的最新情况，报告了共同威胁岛上苏铁的入侵物种。然后，我们对每种食草动物的威胁状况及其相互作用进行了优先级排序。2003年至2005年，外来的高木盾蚧、梅里克潜叶蛾和霍斯菲尔德蝴蝶引发了本地奥里维利乌斯茎蛀虫前所未有的爆发，并增加了野猪的食草量，从而对植物造成了损害。这五种消费者的综合影响是苏铁树种面临的最大持续威胁。迫切需要减轻外来植食性物种造成的损害，以保护这种独特的裸子植物。
