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Arthropod community organization and development in pear

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Abstract

Arthropod communities in pear are conceptualized as hierarchically organized systems in which several levels of organization or subsystems can be recognized between the population level and the community as a whole. An individual pear tree is taken to be the community habitat with arthropod subcommunities developing on leaf, fruit, and wood subcommunity habitats. Each subcommunity is composed of trophically organized systems of populations. Each system of populations is comprised of a functional group or guild of phytophagous arthropods that use the habitat primarily for feeding but also for overwintering or egg deposition, and associated groups of specialized predators, parasitoids, and hyperparasitoids. Several species move from one subcommunity to another during the course of community development and thus integrate community subsystems.

Community development or change in organization through time is conceptualized as being jointly determined by the development of the habitat and the organization of the species pool. The influence of habitat development on community development within a species pool is emphasized in this research. Seasonal habitat development is expressed as change in the kinds and biomasses of developmental states of wood, leaf, and fruit subcommunity habitats. These changes are accompanied by changes in the kinds, biomasses, and distributions of associated community subsystems.

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Authors and Affiliations

  1. 206 Agricultural Bioprocesses Lab, University of Illinois, 1302 W. Pennsylvania, 61801, Urbana, Illinois, USA

    Larry J. Gut

  2. Oak Creek Laboratory of Biology Department of Fisheries and Wildlife, Oregon State University, 97331, Corvallis, Oregon, USA

    W. J. Liss

  3. Southern Oregon Experiment Station, Oregon State University, 569 Hanley Road, 97502, Medford, Oregon, USA

    P. H. Westigard

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  1. Larry J. Gut
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  2. W. J. Liss
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  3. P. H. Westigard
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Gut, L.J., Liss, W.J. & Westigard, P.H. Arthropod community organization and development in pear. Environmental Management 15, 83–104 (1991). https://doi.org/10.1007/BF02393840

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