Title page for ETD etd-36202069662011


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
  • none
Date of Defense 1994-08-01
Availability unrestricted
Abstract
This 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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