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Population consequences of constitutive and inducible plant resistance: herbivore spatial spread.

Publication ,  Journal Article
Morris, WF; Dwyer, G
Published in: The American naturalist
June 1997

Little attention has been paid to the impact that constitutive and inducible plant resistance traits will have on herbivore spatial dynamics. We investigate mathematical models in which herbivore demographic rates and movement rates respond to host plant quality, which in turn is determined by constitutive and inducible resistance. Models with and without induced resistance yield the same analytic expression for the asymptotic speed at which a herbivore population will spread through an initially uninduced plant population, suggesting that induced resistance will have no effect on the rate of invasion of herbivores that respond to plant resistance on small spatial scales. In contrast, constitutive resistance will influence the speed of an invasion. If herbivore movement is quite sensitive to plant quality, an increase in constitutive resistance can actually accelerate the rate of herbivore spread even while it reduces the herbivore's intrinsic rate of increase. In other scenarios, the rate of invasion attains a maximum at intermediate levels of constitutive resistance. These results argue that our view of plant resistance should be broadened to include herbivore movement if we are to understand fully the implications of differences in resistance for the dynamics of herbivore populations in natural and managed settings.

Duke Scholars

Published In

The American naturalist

DOI

EISSN

1537-5323

ISSN

0003-0147

Publication Date

June 1997

Volume

149

Issue

6

Start / End Page

1071 / 1090

Related Subject Headings

  • Ecology
  • 31 Biological sciences
  • 06 Biological Sciences
 

Citation

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Morris, W. F., & Dwyer, G. (1997). Population consequences of constitutive and inducible plant resistance: herbivore spatial spread. The American Naturalist, 149(6), 1071–1090. https://doi.org/10.1086/286039
Morris, W. F., and G. Dwyer. “Population consequences of constitutive and inducible plant resistance: herbivore spatial spread.The American Naturalist 149, no. 6 (June 1997): 1071–90. https://doi.org/10.1086/286039.
Morris WF, Dwyer G. Population consequences of constitutive and inducible plant resistance: herbivore spatial spread. The American naturalist. 1997 Jun;149(6):1071–90.
Morris, W. F., and G. Dwyer. “Population consequences of constitutive and inducible plant resistance: herbivore spatial spread.The American Naturalist, vol. 149, no. 6, June 1997, pp. 1071–90. Epmc, doi:10.1086/286039.
Morris WF, Dwyer G. Population consequences of constitutive and inducible plant resistance: herbivore spatial spread. The American naturalist. 1997 Jun;149(6):1071–1090.
Journal cover image

Published In

The American naturalist

DOI

EISSN

1537-5323

ISSN

0003-0147

Publication Date

June 1997

Volume

149

Issue

6

Start / End Page

1071 / 1090

Related Subject Headings

  • Ecology
  • 31 Biological sciences
  • 06 Biological Sciences