Hybridization of an invasive shrub affects tolerance and resistance to defoliation by a biological control agent

Evolutionary Applications
By: , and 

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Abstract

Evolution has contributed to the successful invasion of exotic plant species in their introduced ranges, but how evolution affects particular control strategies is still under evaluation. For instance, classical biological control, a common strategy involving the utilization of highly specific natural enemies to control exotic pests, may be negatively affected by host hybridization because of shifts in plant traits, such as root allocation or chemical constituents. We investigated introgression between two parent species of the invasive shrub tamarisk (Tamarix spp.) in the western United States, and how differences in plant traits affect interactions with a biological control agent. Introgression varied strongly with latitude of origin and was highly correlated with plant performance. Increased levels of T. ramosissima introgression resulted in both higher investment in roots and tolerance to defoliation and less resistance to insect attack. Because tamarisk hybridization occurs predictably on the western U.S. landscape, managers may be able to exploit this information to maximize control efforts. Genetic differentiation in plant traits in this system underpins the importance of plant hybridization and may explain why some biological control releases are more successful than others.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Hybridization of an invasive shrub affects tolerance and resistance to defoliation by a biological control agent
Series title Evolutionary Applications
DOI 10.1111/eva.12134
Volume 7
Issue 3
Year Published 2014
Language English
Publisher Wiley
Contributing office(s) Fort Collins Science Center
Description 13 p.
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Evolutionary Applications
First page 381
Last page 393
Country United States
State Colorado
City Fort Collins