Evolutionary Ecology

, Volume 19, Issue 6, pp 583–601

Relationships Between Vegetative and Life History Traits and Fitness in a Novel Field Environment: Impacts of Herbivores

Authors

    • Department of BiologyCollege of Charleston
    • Department of BotanyUniversity of Tennessee
  • Warren Denning
    • Department of BotanyUniversity of Tennessee
    • W Spain Wallace Bld.University of Alabama
  • Massimo Pigliucci
    • Department of BotanyUniversity of Tennessee
    • Department of Ecology and EvolutionSUNY-Stony Brook
Research Article

DOI: 10.1007/s10682-005-2005-x

Cite this article as:
Murren, C.J., Denning, W. & Pigliucci, M. Evol Ecol (2005) 19: 583. doi:10.1007/s10682-005-2005-x
  • 84 Views

Abstract

At the edge of a species range, plants may experience myriad microenvironmental gradients, which may differ and impose strong yet complex selective regimes. We explore these issues using the model organism Arabidopsis thaliana, a native of Europe that has naturalized in North America, which we planted in a common garden field plot in Knoxville, Tennessee and observed across two biotic gradients. We found evidence that directional selection favors increased plant size, consistent with hypotheses of plant responses to novel environments. However, selection differed among plants with fungus gnat larvae damage, aphid damage, and plants that escaped herbivory, evidence that the selective landscape is variable and complex even for quasi-natural field plots. We did not uncover evidence for resistance; however, our results suggest that tolerance of A. thaliana may play an important role for population establishment and persistence in the presence of herbivores in a novel environment. Our findings highlight the variation in one segment of the biotic selective landscape of field environments, as well as the importance of biotic interactions in shaping the success of recently established populations that may be a critical component of post-invasion evolution.

Keywords

colonizing speciesherbivorymicroenvironmentnon-native environmentselection analysistolerance
Download to read the full article text

Copyright information

© Springer 2005