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Updated: Mar 6, 2026

Linking Predation Risk, Herbivore Physiological Stress and Microbial Decomposition of Plant Litter
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Predator driven changes in community structure.

R W Black1, N G Hairston2

  • 1Department of Biology, Cornell College, 52314, Mount Vernon, IA, USA.

Oecologia
|March 18, 2017
PubMed
Summary

Predator type significantly impacts zooplankton communities. Replacing fish with phantom midge larvae (Chaoborus americanus) caused major shifts in species, favoring those adapted to this new predation pressure.

Keywords:
Community structurePredation intensitySeasonalSize-selective predationSpecies sorting

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Area of Science:

  • Aquatic Ecology
  • Freshwater Biology
  • Predator-Prey Dynamics

Background:

  • Zooplankton communities are crucial in aquatic ecosystems.
  • Predation pressure is a key factor structuring zooplankton communities.
  • Shifts in dominant predators can lead to significant ecological changes.

Purpose of the Study:

  • To investigate long-term and seasonal changes in zooplankton community structure.
  • To determine the impact of replacing planktivorous fish with phantom midge larvae (Chaoborus americanus) as the primary predator.
  • To correlate zooplankton community dynamics with temporal variations in predation intensity.

Main Methods:

  • Long-term monitoring of a small pond's zooplankton community.
  • Observational studies on predator replacement (fish vs. Chaoborus americanus).
  • Analysis of seasonal changes in zooplankton species composition and size distribution.

Main Results:

  • Zooplankton community structure changed markedly following the shift in dominant predator.
  • Species ill-adapted to Chaoborus predation declined or went extinct.
  • Well-adapted species successfully colonized the pond.
  • Seasonal zooplankton composition and size distribution correlated with predator activity and life stage.

Conclusions:

  • The identity and intensity of predation are critical drivers of zooplankton community structure.
  • Chaoborus americanus larvae exert strong selective pressure on zooplankton.
  • Temporal dynamics of predator populations influence seasonal zooplankton dynamics.