Skip to main content

You are here

How do toxicants move through the environment to affect ecosystems?

Topic

Systems toxicology

Framing Question

How do toxicants move through the environment to affect ecosystems?

Learning Objectives

  • Contrast the effects of environmental toxicants on r strategists versus K strategists.
  • Describe, using examples, the role that toxicants can play in exerting selection pressures on populations.
  • Contrast the effects of toxicants on predator populations, prey populations, and the interactions between them.
  • Discuss how toxicants can alter ecosystem structure in terms of effects on energy flow and the trophic pyramid.
  • Explain the concept of residence times for toxicants in the environment and compare and contrast the ways in which toxicants move through soil, atmosphere, and water.
  • Explain the concepts of bioavailability and bioconcentration.
  • Discuss examples of typical species used in ecotoxicological single-species testing.
  • Compare and contrast the strengths and limitations of the most common methods of ecotoxicological testing including microcosms, mesocosms, field studies, and mathematical modeling.
  • Identify important concepts in ecotoxicological risk assessment

Courses

Courses