Type of Document Master's Thesis Author Lynde, Stuart R. URN etd-36202069662011 Title Techniques for Evaluating Power Plant discharges Using In-Situ Breakdown and Flow Though Laboratory Sediment Bioassays Degree Master of Science Department Biology Advisory Committee
Advisor Name Title Buikema, Arthur L. Jr. Lauth, John L. Cherry, Donald S. Committee Chair Keywords
Date of Defense 1994-08-01 Availability unrestricted AbstractThis research is divided into two main parts.
Chapters 1 and 2 address the effect of thermal
addition on the breakdown of Boxelder leaves
(Acer negundo) in in-situ and artificial stream
studies. In both studies the rates for the decline
in penetrance values decreased significantly in
the thermally influenced treatments. Reduction
in mass-loss rate coefficients was significant in
the in-situ study, but not in the artificial
streams. This result was due to differences in
flow and macroinvertebrate colonization.
Chapters 3 and 4 address the development of
a methodology for testing 24-48 hr old
juvenile Asiatic clams (Corbicula fluminea) to
sediments in 10-day bioassays. These
organisms had acceptable survivorship in the
controls (>70%), excellent recovery of all
exposed organisms (97.5%) and were
sensitive to copper-spiked sediments.
Comparitive sensitivity of this age class
demonstrated them to be equally or more
sensitive than other commonly used sediment
test organisms including Chironomus tentans,
Daphnia magna and Hyalella azteca for
survival and growth endpoints in 10-day
exposures. Survival and growth effects for
Corbicula juveniles were seen at 25 ppb
copper in the sediment.
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