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13 - Multitrophic interactions

from Part V - Food webs and communities

Published online by Cambridge University Press:  05 June 2012

Peter W. Price
Affiliation:
Northern Arizona University
Robert F. Denno
Affiliation:
University of Maryland, College Park
Micky D. Eubanks
Affiliation:
Texas A & M University
Deborah L. Finke
Affiliation:
University of Missouri, Columbia
Ian Kaplan
Affiliation:
Purdue University, Indiana
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Summary

Multitrophic interactions are those that link several (i.e., more than two) trophic levels, including plants (first trophic level), herbivores (second trophic level), and predators, parasitoids or pathogens (third trophic level and beyond; hereafter referred to as “enemies”). These types of multispecies consumer-resource dynamics are also referred to as tritrophic interactions when they specifically involve three trophic levels. Because food webs typically possess more than three trophic levels, with higher-order predators preying on intermediate predators and hyperparasitoids attacking primary parasitoids, we use “multitrophic” as an all-encompassing term that includes tritrophic interactions, but allows for the consideration of more complex food-web dynamics.

Fortunately, the individual components that comprise multitrophic interactions have already been described in some detail throughout earlier sections of this book, especially Chapters 4 through 8 (Part III: Species interactions), which address plant-herbivore interactions, competition, mutualism, predator–prey and host–parasite interactions, respectively. Also, Chapter 2 provided a conceptual foundation for the role of semiochemicals in plant–insect associations, a critical issue that we will revisit often in this chapter as insects live in a chemically mediated world. The purpose then of this chapter is to assemble these isolated units to form an integrated understanding of how plants, herbivores and enemies interact, with the explicit recognition that plants exert direct effects on the ecology of predators and parasitoids, and that indirect effects linking plants with higher trophic levels are commonplace. This has not always been the prevailing view. Historically, plant–herbivore and enemy–prey interactions were treated as two separate fields with no unifying theme. Seminal publications by Hairston et al. (1960), Price et al. (1980) and Oksanen et al. (1981), however, provided the theoretical framework that was lacking and spawned an emergence of studies over subsequent decades. As a result, the field of multitrophic interactions is among the most productive, innovative and exciting realms of insect ecology.

Type
Chapter
Information
Insect Ecology
Behavior, Populations and Communities
, pp. 489 - 534
Publisher: Cambridge University Press
Print publication year: 2011

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References

Hairston, N. G. Smith, F. E. Slobodkin, L. B. 1960 Community structure, population control, and competition Am. Nat 94 421 Google Scholar
Polis, G. A. Strong, D. R. 1996 Food web complexity and community dynamics Am. Nat 147 813 Google Scholar
Price, P. W. Bouton, C. E. Gross, P. 1980 Interactions among three trophic levels: influence of plants on interactions between insect herbivores and natural enemies Annu. Rev. Ecol. Syst 11 41 Google Scholar
Tscharntke, T. Hawkins, B. A. 2002 Multitrophic Level Interactions Cambridge Cambridge University Press
Wäckers, F. L. van Rijn, P. C. J. Bruin, J. 2005 Plant-provided Food for Carnivorous Insects: A Protective Mutualism and its Applications Cambridge Cambridge University Press

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