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	Oligochaeta
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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