Sediment Characteristics and the Trophic Status of Four Oregon Lakes.

摘要

The study was undertaken to evaluate the usefulness of sediment records for correlating changes in the sediment characteristics of four Oregon lakes with past cultural developments of the lakes and their watersheds. The lakes were Waldo, Odell and Diamond Lakes located in the Cascade Mountains and Devils Lake located on the Oregon coast. Percentage dry weight,percentage organic matter,sedimentary chlorophyll degradation products (SCDP),total phosphorus,total organic nitrogen,and diatom assemblages were used as indices of sediment changes through time. Profiles of selected characteristics of the sediment cores reflected the events unique to each lake and its watershed.