, Volume 98, Issue 3–4, pp 269–273

Short-term responses to elevated predator densities: noncompetitive intraguild interactions and behavior

  • M. D. Moran
  • L. E. Hurd
Original Paper


We investigated the short-term response of an arthropod assemblage to elevated generalist predator densities by introducing Chinese mantids (Tenodera sinensis) to field plots in a replicated, controlled experiment. Abundances of carnivorous arthropods were reduced by mantids to a greater extent than herbivores, and cursorial spiders emigrated from treatment plots in greater numbers than from controls. Initially, this emigration consisted only of small spiders that were demonstrated in the laboratory to be prey for mantids. Thus, the initial response of an arthropod assemblage to increased predators, densities was increased interactions among predators, which caused decline in predator population densities in a shorter time than competition for prey would require. Predator avoidance behavior must be considered together with intraguild predation and competition when interpreting the outcome of predator manipulations. Shortterm experiments may be more valuable than longer term studies in detecting this effect.

Key words

Arthropod predators Spiders Mantids Intraguild predation Community structure 


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  1. Bernays E, Graham M (1988) On the evolution of host specificity in phytophagous arthropods. Ecology 69: 886–892Google Scholar
  2. Chiverton PA (1986) Predator density manipulation and its effects on populations of Rhodopalosiphum padi (Homoptera: Aphididae) in spring barley. Ann Appl Biol 109: 49–60Google Scholar
  3. Conley MR (1985) Predation versus resource limitation in survival of adult burrowing wolf spiders (Araneae: Lycosidae). Oecologia 67: 71–75Google Scholar
  4. Connell JH (1980) Diversity and the coevolution of competitors, or the ghost of competition past. Oikos 35: 131–138Google Scholar
  5. Edgar WD (1969) Prey and predators of the wolf spider Lycosa lubugris. J Zool 159: 405–411Google Scholar
  6. Eisenberg RM, Hurd LE (1977) An ecological study of the emergence characteristics for egg cases of the Chinese mantis (Tenodera sinensis Saussure). Am Midl Nat 97: 478–482Google Scholar
  7. Fagan WF, Hurd LE (1991) Late season food level, cannibalism, and oviposition in adult mantids (Orthoptera:Mantidae): sources of variability in a field experiment. Proc Ent Soc Wash 93: 9556–961Google Scholar
  8. Fagan WF, Hurd LE (1994) Hatch density variation of a generalist arthropod predator: population consequences and community impact. Ecology (in press)Google Scholar
  9. Futuyma DJ, Gould F (1979) Associations of plants and insects in a deciduous forest Ecol Monogr 49: 33–50Google Scholar
  10. Gurney AB (1950) Praying mantids of the United States, native and introduced. Smithson Inst Annu Rep 1950: 339–362Google Scholar
  11. Hairston NG, Smith FE, Slobodkin LB (1960) Community structure, population control, and competition. Am Nat 94: 421–425Google Scholar
  12. Hallander H (1970) Prey, cannibalism and microhabitat selection in the wolf spiders Pardosa chelata O. F. Muller and P. pullata Clerck. Oikos 21: 337–340Google Scholar
  13. Hassell MP (1978) The dynamics of arthropod predator-prey systems. Princeton University Press, Princeton, New Jersey, USAGoogle Scholar
  14. Holling CS (1959) The components of predation as revealed by a study of small mammal predation of the European pine sawfly. Can Entomol 91: 293–320Google Scholar
  15. Horton CC, DH Wise (1983) The experimental analysis of competition between two synoptic species of orb-web spiders (Araneac: Araneidae). Ecology 64: 929–944Google Scholar
  16. Hurd LE (1988) Consequences of divergent egg phenology to predation and coexistence of two sympatric, congeneric mantids (Orthoptera: Mantidae). Oecologia 76: 547–550Google Scholar
  17. Hurd LE, Eisenberg RM (1984a) Experimental density manipulations of the predator Tenodera sinensis (Orthoptera: Mantidae) in an old field community. I. Mortality, development, and dispersal of juvenile mantids. J Anim Ecol 53: 269–281Google Scholar
  18. Hurd LE, Eisenberg RM (1984b). Experimental density manipulations of the predator Tenodera sinensis (Orthoptera: Mantidae) in an old field community. II The influence of mantids on arthropod community structure. J Anim Ecol 53: 955–967Google Scholar
  19. Hurd LE, Eisenberg RM (1990) Arthropod community responses to manipulation of a bitrophic predator guild. Ecology 76: 2107–2114Google Scholar
  20. Hurd LE, Fagan WF (1992) Cursorial spiders and succession: age or habitat structure? Oecologia 92: 215–221Google Scholar
  21. Hurd LE, Rathet IH (1986) Functional response and success in juvenile mantids. Ecology. 67: 163–167Google Scholar
  22. Hurlbert SH (1984) Pseudoreplication and design of ecological field experiments. Ecol Monogr 54(2):187–211Google Scholar
  23. Polis GA, McCormick SJ (1987) Intraguild predation and competition among desert scorpions. Ecology. 68: 332–343Google Scholar
  24. Polis GA, Meyers CA, Holt RD (1989) The ecology and evolution of intraguild predation: potential competitors that eat each other. Annu Rev Ecol Syst 20: 297–330Google Scholar
  25. Rathet IH, Hurd LE (1983) Ecological relationships among co-occurring mantids, Tenodera sinensis (Saussure), T. angustipennis (S.), and Mantis religiosa (L.). Am Midl Nat 110: 240–248Google Scholar
  26. Rice WR (1989) Analyzing tables of statistical tests. Evolution 43: 223–225Google Scholar
  27. Riechert SE, Cady AB (1983) Patterns of resource use and tests for competitive release in a spider commnity. Ecology 64: 899–913Google Scholar
  28. Riechert SE, Bishop L (1990) Prey control by an assemblage of generalist predators: spiders in garden test systems. Ecology 71: 1441–1450Google Scholar
  29. Risch SJ, Carroll CR (1982) Effect of a keystone predaceous ant, Solenopsis geminata, on arthropods in a tropical agroecosystem. Ecology 63: 1979–1983Google Scholar
  30. Roughgarden J (1983) Competition and theory in community ecology. Am Nat 122: 583–601Google Scholar
  31. Schaefer M (1978) Some experiments on regulation of population density in the spider Floronia bucculenta (Araneidae: Linyphiidae). Symp Zool Soc London 42: 203–210Google Scholar
  32. Spiller DA, Schoener TW (1988) An experimental study of the effects of lizards on web-spider communities. Ecol Monogr 58: 57–77Google Scholar
  33. Stamps J (1983) The relationship between ontogenetic habitat shifts, competition and predator avoidance in a juvenile lizard. (Anolis aeneus) Behav Ecol Sociobiol 12: 19–33Google Scholar
  34. Wise DH (1993) Spiders in ecological webs. Cambridge Univesity Press, CambridgeGoogle Scholar

Copyright information

© Springer Verlag 1994

Authors and Affiliations

  • M. D. Moran
    • 1
  • L. E. Hurd
    • 2
  1. 1.Ecology Program, School of Life and Health SciencesUniversity of DelawareNewarkUSA
  2. 2.Department of BiologyWashington and Lee UniversityLexingtonUSA

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