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Comparing the consequences of induced and constitutive plant resistance for herbivore population dynamics

Publication ,  Journal Article
Underwood, N; Rausher, M
Published in: American Naturalist
January 1, 2002

Although it has been suggested that induced and constitutive plant resistance should have different effects on insect herbivore population dynamics, there is little experimental evidence that plant resistance can influence herbivore populations longer than one season. We used a density-manipulation experiment and model fitting to examine the effects of constitutive and induced resistance on herbivore dynamics over both the short and long term. We used likelihood methods to fit population dynamic models to recruitment data for populations of Mexican bean beetles on soybean varieties with no resistance, constitutive resistance, or induced resistance. We compared model configurations that fit parameters for resistance types separately to models that did not account for resistance type. Models representing the hypothesis that the three resistance types differed in their effects on beetle dynamics received the most support. Induced resistance resulted in lower population growth rates and stronger density dependence than no resistance. Constitutive resistance resulted in lower population growth rates and stronger density dependence than induced resistance. Constitutive resistance had a stronger effect on both short-term beetle recruitment and predicted beetle population dynamics than induced resistance. The results of this study suggest that induced and constitutive resistance can differ in their effects on herbivore populations even in a relatively complex system.

Duke Scholars

Published In

American Naturalist

DOI

ISSN

0003-0147

Publication Date

January 1, 2002

Volume

160

Issue

1

Start / End Page

20 / 30

Related Subject Headings

  • Ecology
  • 31 Biological sciences
  • 06 Biological Sciences
 

Citation

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Underwood, N., & Rausher, M. (2002). Comparing the consequences of induced and constitutive plant resistance for herbivore population dynamics. American Naturalist, 160(1), 20–30. https://doi.org/10.1086/340602
Underwood, N., and M. Rausher. “Comparing the consequences of induced and constitutive plant resistance for herbivore population dynamics.” American Naturalist 160, no. 1 (January 1, 2002): 20–30. https://doi.org/10.1086/340602.
Underwood N, Rausher M. Comparing the consequences of induced and constitutive plant resistance for herbivore population dynamics. American Naturalist. 2002 Jan 1;160(1):20–30.
Underwood, N., and M. Rausher. “Comparing the consequences of induced and constitutive plant resistance for herbivore population dynamics.” American Naturalist, vol. 160, no. 1, Jan. 2002, pp. 20–30. Scopus, doi:10.1086/340602.
Underwood N, Rausher M. Comparing the consequences of induced and constitutive plant resistance for herbivore population dynamics. American Naturalist. 2002 Jan 1;160(1):20–30.
Journal cover image

Published In

American Naturalist

DOI

ISSN

0003-0147

Publication Date

January 1, 2002

Volume

160

Issue

1

Start / End Page

20 / 30

Related Subject Headings

  • Ecology
  • 31 Biological sciences
  • 06 Biological Sciences