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Rainer Grimm1

  • 1Abt. Ökologie, II. Zoologisches Institut und Museum der Universität Göttingen, Göttingen, Deutschland.

Oecologia
|March 18, 2017
PubMed
Summary

This study quantifies the energy turnover of three weevil species, Rhynchaenus fagi, Strophosomus, and Otiorrhynchus singularis, in beech wood ecosystems. Rhynchaenus fagi populations exhibit significant energy assimilation, dominating phytophagous insect energy consumption.

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Area of Science:

  • Ecology
  • Insect Physiology
  • Biogeochemistry

Context:

  • Investigates energy turnover in Rhynchaenus fagi, Strophosomus, and Otiorrhynchus singularis weevil populations.
  • Examines life cycles, abundance dynamics, and energy budgets of these Curculionidae species.
  • Focuses on beech wood ecosystems, analyzing population-level energy flow.

Purpose:

  • To establish the energy budget of average individuals for each species.
  • To calculate the overall energy turnover of the weevil populations within the ecosystem.
  • To determine the ecological efficiency and consumption rates of these phytophagous insects.

Summary:

  • Quantified energy budgets and turnover for R. fagi (all stages), Strophosomus (imagines), and O. singularis (imagines).
  • R. fagi populations demonstrated significant energy assimilation, contributing substantially to the ecosystem's phytophagous insect energy consumption.
  • Ecological efficiency (P/C %) ranged from 14-20% for R. fagi larvae and 7.0-8.5% for weevil imagines.

Impact:

  • R. fagi populations are identified as ecologically dominant phytophagous insects in beech woods, particularly in younger stands.
  • Provides crucial data on the role of specific insect populations in forest energy dynamics.
  • Highlights the importance of understanding insect energy budgets for ecosystem management and conservation.

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