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11 - Effects of arthropods as physical ecosystem engineers on plant-based trophic interaction webs

Published online by Cambridge University Press:  12 August 2009

By
Robert J. Marquis  and
John T. Lill
Edited by
Takayuki Ohgushi ,
Timothy P. Craig  and
Peter W. Price
Robert J. Marquis
Affiliation:
University of Missouri–St. Louis
John T. Lill
Affiliation:
George Washington University
Takayuki Ohgushi
Affiliation:
Kyoto University, Japan
Timothy P. Craig
Affiliation:
University of Minnesota, Duluth
Peter W. Price
Affiliation:
Northern Arizona University
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Summary

Introduction

Insect herbivores and other arthropods create a variety of constructs on their host plants: silk webs, leaf shelters, galls, and stem cavities. This state change, often modifying resource availability for species other than the construct-builder (constructor, hereafter), is an example of allogenic physical ecosystem engineering. Physical ecosystem engineers are “organisms that directly or indirectly control the availability of resources to other organisms by causing physical state changes in biotic or abiotic materials” (Jones et al. 1994, 1997). In the case of allogenic engineering (in contrast to autogenic engineering), the physical state change is caused by the engineer, but the engineer is not part of the new physical state.

The presence of constructs can impact the species richness, food web structure, and trophic interactions of the community of arthropods associated with engineered plants. The impact of engineering will depend on the responses of individual species to the presence of the constructs and the resulting interactions with all other species. One approach to understanding the nature of these responses is to view the engineered plant as a mosaic of engineered and nonengineered habitats. The response of a particular animal species to a plant that has been colonized by a constructor will depend on the relative value of the engineered versus nonengineered habitat to that animal. This value will be a function of differences between the two habitat types in the intensity of abiotic stress, the relative quality of food resources, competitive and mutualistic interactions (with other species in nonengineered habitats and with other secondary inhabitants in engineered habitats), and responses of natural enemies to engineering.

Type
Chapter
Information
Ecological Communities
Plant Mediation in Indirect Interaction Webs
 , pp. 246 - 274
Publisher: Cambridge University Press
Print publication year: 2007

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To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

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