Skip to Main Content
Considerations for evaluating controlled exposure studies of tree seedlings.Author(s): E. Charles Peterson; A. Robert Mickler
Source: Journal of Environmental Quality. 23(2): 257-267
Publication Series: Scientific Journal (JRNL)
PDF: Download Publication (2.61 MB)
DescriptionTree seedling exposure studies, covering a wide range of experimental conditions in pollutant treatments, species, facilities, and exposure regimes, have been conducted during the past several years to determine acute effects and relative sensitivity of tree species in response to simulated acid precipitation and gaseous pollutants. Because of tile difficulties inherent in conducting controlled exposures with mature trees (e.g., size, variability among experimental units, and costs associated with replication of treatments), seedling exposure studies have been initiated as the quickest way to address these issues. However, sufficient consideration has not been given to either the comparability, of seedling studies or to their appropriate inference. The statistical power of any given analysis is rarely discussed when the outcomes are published. Appropriate and documented statistics of experimenter bias are often not reported, and variability in the exposure regime (i.e., treatment target levels) and the measurement of experimental variables is assumed to be zero, ratites than quantified. Finally, the populations of seedling for which seedling experiments have inference, the extent to which seedling responses are applicable to mature trees and forest condition and the limitations in national or regional generalizations are crucial issues often left to an individual reader’s interpretation without the benefit of adequate quantitative information presented by the authors.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationPeterson, E. Charles, Jr.; Mickler, A. Robert. 1994. Considerations for evaluating controlled exposure studies of tree seedlings. Journal of Environmental Quality. 23(2): 257-267
- Design issues for evaluating seedling exposure studies.
- Effect of surface ozone exposures on vegetation grown in the southern Appalachian Mountains: identification of possible areas of concern
- Free-air exposure systems to scale up ozone research to mature trees
XML: View XML