Type of Document Master's Thesis Author Garland, Jay L. URN etd-03122013-040132 Title Effects of grazing by the oligochaete, Aeolosoma, on detrital and periphytic assemblages Degree Master of Science Department Zoology Advisory Committee
Advisor Name Title Buikema, Arthur L. Jr. Committee Chair Benfield, Ernest Fredrick Committee Member Horner, Sally G. Committee Member Keywords
Date of Defense 1985-12-05 Availability restricted Abstract
The effects of grazing by the small oligochaete, Aeolosoma, on periphyton assemblages of different algal composition and on unconditioned detritus were examined. Natural water and periphyton inoculum were collected from a littoral environment and used to construct laboratory microcosms. Changes in algal community composition, microbial respiration, and structural indices (Chlorophyll a, protein, and carbohydrate) were measured in grazed and ungrazed cultures through time in 2 to 12 d experiments.
Grazed cultures after 10 to 12 d had dissimilar algal community compositions in both the early and late summer periphytic assemblages as measured by Pinkham and Pearson's Index of Similarity (B). Changes resulted from stimulation (Green coccoids, thin green filaments) and suppression (certain diatoms) of individual algal taxa, and not from the dramatic shifts in comunity composition and structure effected by macroinvertebrate grazing.
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