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Creator:: Welch, E. B. (Eugene B.), Spyridakis, Dimitri E., U.S. International Biological Program. Coniferous Forest Biome, and University of Washington
Abstract:: A steady-state phosphorus cycle was determined for the stratified period May to November in Lake Sammamish, Washington. A steady-state. condition for this period is considered at this time since data on some important processes are only sufficient to estimate average values for the stratified period. Nevertheless, such a cycle is...
Resource Type:: Technical Report
Full Text:: STRATIFIED PERIOD IN LAKE SAMMAMISH Eugene B. Welch and Dimitri E. Spyridakis Department of Civil

Creator:: Spyridakis, Dimitri E., Welch, E. B. (Eugene B.), U.S. International Biological Program. Coniferous Forest Biome, and University of Washington
Abstract:: Aquatic mineral measurements and sediment characterization of the Cedar River basin lakes and streams reveals two largely distinct physical and chemical environments. Near the headwaters of the Cedar River Watershed the composition of lakes and streams reflect adjacent rocks but the effects of forest and agricultural practices and of processes...
Resource Type:: Technical Report
Full Text:: CEDAR RIVER WATERSHED . E. Spyridakis and E. B. Welch University of Washington ABSTRACT Aquatic

Creator:: Welch, E. B. (Eugene B.), Hendrey, George R., Litt, Arni, Rock, C. A., and U.S. International Biological Program. Coniferous Forest Biome
Abstract:: Lakes Findley, Chester Morse and Sammamish, Washington, are characterized by one major outburst of phytoplankton productivity and biomass (mainly diatoms) with usually no or low fall activity. Vernal outbursts were often delayed in the monomictic lakes by inadequate light because of unfavorable climate and/or a lack of thermal stratification. Strong...
Resource Type:: Technical Report
Full Text:: GROWTH RATE KINETICS IN THE CEDAR RIVER LAKES E. B. Welch, G. R. Hendrey, A. Litt, and C. A. Rock

Creator:: Welch, E. B. (Eugene B.), Pederson, G. L., Stoll, Richard Kenneth, and U.S. International Biological Program. Coniferous Forest Biome
Abstract:: Zooplankton grazing rates and life history stage densities for secondary production estimates were determined in three lakes in the Cedar River watershed, Washington. Eight copepod species, seven cladoceran and nine rotifer species were identified in the three lakes. No one species of cladoceran or copepod occurred in all the lakes,...
Resource Type:: Technical Report
Full Text:: ZOOPLANKTON IN LAKES OF THE CEDAR RIVER WATERSHED E. B. Welch, G. L. Pederson and R. K. Stoll University of

Creator:: Welch, E. B. (Eugene B.), Litt, Arni, Pederson, G. L., U.S. International Biological Program. Coniferous Forest Biome, and University of Washington
Resource Type:: Technical Report
Full Text:: using a radioisotope tracer. M.S. thesis, Univ. Washington, 57 p. WELCH, E. B., G. L. PEDERSON, and R

Creator:: Welch, E. B. (Eugene B.), Spyridakis, Dimitri E., Christman, R. F. (Russell F.), 1936-, U.S. International Biological Program. Coniferous Forest Biome, and University of Washington
Abstract:: The objectives for year have been the gathering of existing information, initiation of monitoring water quality, evaluation of analytical methods and procedures for measuring nutrient regeneration in the sediment-water interface, and the study of growth-environment correlations in Findley Lake, Chester Morse Reservoir, and Lakes Sammamish and Washington. Progress was made...
Resource Type:: Technical Report
Full Text:: PRODUCTIVITY IN NATURAL LAKES Fi. B. Welch, D. F. :°.pyridakis, and R. F. Chr strnan University of Washington

Creator:: Welch, E. B. (Eugene B.), Pederson, G. L., Stoll, Richard Kenneth, U.S. International Biological Program. Coniferous Forest Biome, and University of Washington
Abstract:: Grazing rates and density of the crustacean zooplankton were measured in Findley and Chester Morse Lakes and Lake Sammamish, Washington. Sample analysis is incomplete at reporting time, thus estimates of production from examination of life stage biomass changes was not possible. Maximum density of crustacean zooplankton was about 10/1 in...
Resource Type:: Technical Report
Full Text:: ZOOPLANKTON IN LAKES OF CONTRASTING TROPHIC STATUS -- A PROGRESS REPORT E. B. Welch, G. L. Pederson and R. K

Creator:: Welch, E. B. (Eugene B.), Hendrey, George R., Rock, C. A., U.S. International Biological Program. Coniferous Forest Biome, and University of Washington
Abstract:: Lakes Findley, Chester Morse and Sammamish, Washington, are characterized by one major outburst of phytoplankton productivity and biomass (mainly diatoms) with usually no or low fall activity. Vernal outbursts were often delayed in some lakes and years probably by unfavorable climate (snow cover and cloudy rainy conditions). Mean spring-summer productivity...
Resource Type:: Technical Report
Full Text:: RESPONSE TO ALTERED NUTRIENT CONTENT IN LAKES OF CONTRASTING TROPHIC STATE E. B. Welch, G. R. Hendrey, and

Creator:: Welch, E. B. (Eugene B.), Hendrey, George R., Litt, Arni, Rock, C. A., U.S. International Biological Program. Coniferous Forest Biome, and University of Washington
Abstract:: Sample collection to define the phytoplankton biomass and productivity in Lakes Findley, Chester Morse, and Sammamish was conducted according to the schedule In Figure 1. Methods and procedures are the same as those used in 1972 (Welch et al. 1972). The purpose of such sampling is to provide validation data...
Resource Type:: Technical Report
Full Text:: field data books with the authors. References WELCH, E. B., G. R. HENDREY, and C. A. ROCK. 1972

Creator:: Spyridakis, Dimitri E., Birch, Peter Barrett, 1947-, Barnes, B., U.S. International Biological Program. Coniferous Forest Biome, and University of Washington
Resource Type:: Technical Report
Full Text:: LAKES IN THE LAKE WASHINGTON DRAINAGE BASIN D. Spyridakis, P. Birch and B. Barnes University of

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