Role of plant secondary compounds in invasion biology of an insect herbivore in novel habitats

短叶松是加拿大北方森林的主要树种，为许多植物和动物物种提供基本服务。然而，它的存在受到了入侵的山松甲虫的威胁，因为它已经杀死了数百万公顷的历史宿主树木，主要是北美西部的黑松，最近入侵了北方阿尔伯塔（加拿大）的杰克松森林的西部。在其历史范围内，山松甲虫与黑松有着悠久的共同进化历史，并已适应利用其次生化合物。然而，它是未知的杰克松和lodgepole松是否在他们的易感性不同的甲虫，因为这两个物种的变化相对于组成的二级化合物，可能会影响主机树甲虫的相互作用。

Jack pine is a dominant tree species in the Canadian boreal forest, providing essential services for a number of plant and animal species. However, its existence has been threatened by the invasive mountain pine beetle as it has killed millions of hectares of historical host trees, mainly lodgepole pine in Western North America during the last outbreak and recently invaded the western extend of jack pine forests in northern Alberta (Canada). Within its historical range, mountain pine beetle shares a long co-evolutionary history with lodgepole pine and has adapted to utilize its secondary compounds. However, it is unknown whether jack pine and lodgepole pine differ in their susceptibility to beetles as both species vary with respect to the composition of secondary compounds which could affect host tree-beetle interactions.