Skip to main content

Biologic Markers of Air-Pollution Stress and Damage in Forests (1989) / Chapter Skim
Currently Skimming:

Conclusions and Recommendations
Pages 22-24

The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.


From page 22...
... Other stresses can produce symptoms in plants that mimic or conceal damage caused by air pollution. Current markers of forest change typically fail to distinguish the effects of different pollutants.
Read the entire page →
From page 23...
... Controlled experimental exposures of forest species to air pollution are necessary to confirm a conclusion that forest changes observed in survey studies are due to ambient exposures. Such experiments can be done on potted plants in greenhouses and other laboratory facilities, or in the field with chambers for seedlings or branches, or in both places simultaneously.
Read the entire page →
From page 24...
... Because markers currently used to survey forest and tree responses to ambient concentrations of air pollutants cannot by themselves delineate cause-and-effect relationships, they must be used in concert with controlled-exposure techniques that involve monitoring and experimentation. Ongoing regional surveys of forest responses to air pollution should be used to help identify specific areas for detailed studies of air-pollution effects.
Read the entire page →

Key Terms

  • biologic markers
  • forest responses
  • workshop presentations
  • plant canopies
  • observed changes

  • sensitive species
  • marker techniques
  • newly available
  • stress measure
  • current biologic

  • tree responses
  • chemistry analysis
  • produce symptoms
  • affect plants
  • include stream

  • physiologic adaptations
  • ambiguity associated
  • confer contrasting
  • link observed
  • low temperatures

  • conclusions intended
  • forest status
  • focusing analysis
  • separate responses
  • changes observed

  • current markers
  • single species
  • continuing efforts
  • variations alter
  • various air


    • This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
    More information on Chapter Skim is available.