Record Display for the EPA National Library Catalog


Main Title Environmental Modification and Shoot Growth in a Closed Ecosystem to Evaluate Long-Term Responses of Tree Seedlings to Stress.
Author Olszyk, D. M. ; Tingey, D. T. ;
CORP Author National Health and Environmental Effects Research Lab., Corvallis, OR. Western Ecology Div.
Publisher 1996
Year Published 1996
Report Number EPA/600/A-96/077;
Stock Number PB97-122931
Additional Subjects Trees ; Stress(Physiology) ; Seedlings ; Seedlings ; Vegetation ; Ecosystems ; Responses ; Biological effects ; Douglas-fir ; Pseudotsuga menziesii
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
NTIS  PB97-122931 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 9p
Determining ecosystem responses to stress requires careful control of the environment while measuring biological effects. Technologically advanced sun-lit closed chambers at WED were found to provide appropriate environmental control and measurement compared to chamberless controls. Chamber impacts on the ecosystems were documented so that treatment effects could be interpreted. Differences in growth can likely be attributed to less soil moisture and lower light intensities, and possibly slightly greater vapor pressure deficits in chamber vs. outside during parts of the year. Because of the advance control system, the effects of these sunlit chambers on plant growth appears to be negligible.