Effects of Suspended and Deposited Sediments on Estuarine Organisms. Phase II.
Final rept. 17 Sep 70-31 Dec 73,
MARYLAND UNIV SOLOMONS NATURAL RESOURCES INST
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A three-year laboratory study identified biological components of selected populations of estuarine organisms which were most sensitive to the effects of particle size and concentration of 1 suspended mineral solids similar in size to sediments likely to be found in, or added to, estuarine systems in concentrations typically found during flooding, dredging, and disposal of dredged material, and 2 natural sediments in idential experiments. Significant mortality of estuarine fishes was demonstrated at these suspended solids concentrations. Early life states were more sensitive to suspended solids than adults. Bioassays with natural sediments indicated that suspensions of natural muds affect fishes in the same way as fullers earth, but higher concentrations of natural material were required to produce the same level of response. Carbon assimilation by four species of phytoplankton was significantly reduced by the light attenuating properties of fine silicon dioxide suspensions.
- Biological Oceanography
- Hydrology, Limnology and Potamology
- Water Pollution and Control