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Filtering by: Subject Stream ecology -- Washington (State)

Salmon and marine-derived nutrient effects on primary and secondary trophic levels

Creator:

Claeson, Shannon M.

Abstract:

The purpose of this study was to understand the influence of organic material and nutrients from spawning salmon and supplemented salmon carcasses on stream food webs. My study objectives were to examine 1) assimilation of salmon-derived nutrients (SDN) by producers and consumers in the food web, 2) epilithic biofilm productivity,...

Resource Type:

Masters Thesis
Energy transfer in an autotrophic-based ecosystem : with special reference to effects of fertilizer nitrogen additions

Creator:

Speir, Jon A. and U.S. International Biological Program. Coniferous Forest Biome

Abstract:

Three aspects of lotic ecology have been analyzed utilizing data collected from totally autotrophic-based streams maintained by the Weyerhaeuser Company: energy transfer, effects of nitrogen addition, and simulation modeling. All three streams had very similar periphyton, grazer, collector, invertebrate predator, and vertebrate predator (fish) communities during the study period (1972-1974)....

Resource Type:

Technical Report