Record Display for the EPA National Library Catalog


Main Title Environmental Gradients in Northwest Freshwater Wetlands.
Author Sanville, W. D. ; Eilers, H. P. ; Boss, T. R. ; Pfleeger, T. G. ;
CORP Author Corvallis Environmental Research Lab., OR. ;Willamette Univ., Salem, OR. ;Guelph Univ. (Ontario). Dept. of Geography.
Year Published 1986
Report Number EPA/600/J-86/413;
Stock Number PB88-123948
Additional Subjects Fresh water ; Gradients ; Temperature gradients ; Ecology ; Environments ; Wetlands
Library Call Number Additional Info Location Last
NTIS  PB88-123948 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 12p
Wetland environmental characteristics are examined to determine their spatial and temporal relationships. Two very different Oregon freshwater wetlands provided a range of wetland types. Results are evaluated to determine the possible use of environmental characteristics in defining wetlands and their boundaries. Representative physical, hydrological, and edaphic properties were periodically measured in microplots along upland/wetland transects. A multivariate approach is stressed in the data analysis; correlation, cluster analysis, and principal components analyses were used. The results indicate the environmental characteristics change in a quantifiable manner both spatially and temporally. The controlling mechanism is moisture, spatially in terms of the upland/wetland transect and temporally with respect to seasonal response. These changes do not correlate well with vegetation. Several hypotheses are offered as an explanation. Correlation within environmental characteristics is variable but definite patterns are discernible.