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

杰克松是加拿大北方落叶林中的优势树种，为许多动植物物种提供基本服务。然而，它的生存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寄主树木，主要是上次暴发期间北美西部的松树，最近还入侵了加拿大阿尔伯塔省北部的杰克松森林。在其历史范围内，山松甲虫与樟子松有着长期的共同进化历史，并已适应利用其次生化合物。然而，目前尚不清楚杰克松和小叶松对甲虫的敏感性是否不同，因为这两个物种在次生化合物的组成方面存在差异，这些次生化合物可能会影响寄主树木与甲虫的相互作用。

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.