POTENTIAL FOR SELF-DEFEATING BIOLOGICAL CONTROL? VARIATION IN HERBIVORE VULNERABILITY AMONG INVASIVE SPARTINA GENOTYPES

摘要: Invasive species can experience strong selection in their new environments. Some populations of invasive Spartina spp. cordgrass Pacific estuaries have been separated from the specialist planthopper Prokelisia marginata for many generations while virtually no native populations, Atlantic and Gulf coasts North America, experienced this separation. Contemplating implications biological control, we compared resistance tolerance to with ones that herbivore generations. We found plant genotypes varied more ability resist support planthoppers a population had (in Willapa Bay, Washington, USA) than one consistently exposed San Francisco California, USA). In former, some >50% shoot mortality others non...