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Temporal scales in ecological risk assessment.

J Burger1, M Gochfeld

  • 1Department of Biological Sciences, Rutgers University, Piscataway, New Jersey 08855.

Archives of Environmental Contamination and Toxicology
|November 1, 1992
PubMed
Summary

Ecological risk assessment (ERA) adapts human health risk assessment (HRA) but must account for differing temporal scales. Incorporating these temporal variations is crucial for accurate ecological impact prediction.

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Area of Science:

  • Environmental Science
  • Ecology
  • Risk Assessment

Background:

  • Human health risk assessment (HRA) was formalized in 1983.
  • Ecological risk assessment (ERA) is an emerging discipline adapting HRA principles.
  • Environmental impact statements have a long history but are being formalized using risk-based approaches.

Purpose of the Study:

  • To suggest incorporating differing temporal scales into ecological risk assessment.
  • To highlight temporal variations in non-human species and multispecies assemblages.
  • To address challenges in ERA for predicting ecosystem impacts.

Main Methods:

  • Adapting the human health risk assessment (HRA) paradigm for ecological endpoints.
  • Analyzing temporal variations in species lifespans, lifestages, and growth.
  • Considering impacts on food webs and differing species exposures.

Main Results:

  • Temporal scales differ significantly between HRA and ERA.
  • Species-specific temporal variations include lifespan, lifestages, and growth.
  • Multispecies assemblages introduce complex food web exposures.

Conclusions:

  • ERA must integrate temporal scale differences for accurate assessment.
  • Developing principles for predicting exposure to critical life stages is a key challenge.
  • Establishing appropriate temporal scales is essential for evaluating ecological outcomes.

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