| 出版: | [Washington, D.C.] : U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration |
| 出版: | Fort Belvoir, Virginia : Springfield, Virginia : U.S. Army Coastal Engineering Research Center ; National Technical Information Service, Operations Division |
| 附註: | "November 1982." Cover title. Includes bibliographical references (page 22). C31665 |
| 出版: | Fort Belvoir, Virginia : U.S. Army, Corps of Engineers, Coastal Engineering Research Center |
| 附註: | "January 1982." Cover title. Includes bibliographical references (pages 24-26). APPROVED FOR PUBLIC RELEASE. Benthic fauna from two stations within a 5-year-old borrow area and two control stations off Hillsboro Beach (Broward County), Florida, were sampled quarterly from June 1977 to March 1978 to evaluate the long-term impact of offshore dredging. Generally enhanced productivities occurred within the borrow area, although there was much seasonal variation among stations. Species diversities were usually higher at the borrow stations than at the control stations. The single exception was due to a high concentration of the bivalve E. nitens at one of the control stations in June. Although faunal similarity analysis revealed a qualitative change in the fauna of the borrow area, this change is not considered detrimental. Conspicuous patterns of heterogeneous faunal distributions were evident in this study, particularly for the bivalve E. nitens. No lasting detrimental effects, in terms of numbers of species, faunal densities, or species diversity, resulted from the dredging operation. (Author). |
| 出版: | Washington, D.C. : Springfield, Va. : U.S. Coast Guard, Office of Research and Development ; National Technical Information Service |
| 附註: | "September 1982." Includes bibliographical references. |
| 出版: | Fort Belvoir, Virginia : U.S. Army, Corps of Engineers, Coastal Engineering Research Center |
| 附註: | "January 1982." Cover title. Includes bibliographical references (pages 52-57).76 APPROVED FOR PUBLIC RELEASE. The long-term effects of beach nourishment on the benthic infauna and surface sediments of Panama City beaches were investigated. Forty-seven stations located on nine transects between West Pass and Philips Inlet, and two nourishment borrow sites were sampled in November-December 1979 and May 1980. The data collected were compared to prenourishment base-line information collected by Saloman (1976). Abiotic parameters, water temperature, dissolved oxygen and salinity were measured. Sediments were analyzed for particle-size distribution, percent organic carbon and percent carbonate. Benthic macroinvertebrates were represented by 162 taxa of 14 major animal phyla. Species composition and faunal densities varied seasonally. Polychaetes and amphipods were the most abundant animal groups; a small number of species were dominant at nearly all stations. Species diversity was lowest in the swash zone and sandbar stations and highest offshore. Sediment composition was similar to that of Saloman's (1976) study within limits of sampling and processing errors. Faunal composition was found to be different from 1976 but was attributed to normal seasonal and spatial variations. Based on benthic community analyses and sediment parameters, no significant differences were found between nourishment borrow sites and surrounding areas and in the nearshore areas where beach nourishment was conducted. No long-term adverse effects of beach nourishment were detected. (Author). DACW72-79-C-0026G31266 |
| 出版: | Fort Belvoir, Virginia : U.S. Army, Corps of Engineers, Coastal Engineering Research Center |
| 附註: | "March 1982." Distributed to depository libraries in microfiche. Cover title. Includes bibliographical references (page 30). APPROVED FOR PUBLIC RELEASE. This report gives biological and physical oceanographic data from baseline work, and studies of dredged and undredged sediments before and after dredging (9-meter contour) for beach nourishment at Panama City Beach, Florida. These studies were designed to show major short-term environmental effects of offshore dredging and included analyses of hydrology, sediments, and benthos. (Author). DACW72-81-M-0198G31266 |
| 附註: | Maritime Administration, Washington, D.C. Author corporate affiliation: Offshore Power Systems, Jacksonville, Fla. Author corporate affiliation: Newport News Shipbuilding, Va. Subject code: BL Subject code: DDS Subject code: WODW |
| 出版: | Washington, D.C. : U.S. Environmental Protection Agency, Office of Research and Development |
| 附註: | "September 1982." Includes bibliographical references. v. 1. [No specific title]] -- v. 2. Appendices A through C -- v. 3. Appendices D through K -- v. 4. Supplement, appendices L through O. |
| 出版: | Washington, D.C. : U.S. Dept. of the Interior, Fish and Wildlife Service |
| 附註: | "Papers presented in part at a seminar ... at the Annual Meeting of the American Society for Microbiology (Applied and Environmental Microbiology Division), May 1980, Miami Beach, Florida." Includes bibliographies. Cellular mechanisms of Paraquat toxicity. pp. 29 Biochemical determination of biomass and community structure of estuarine detrital and sedimentary microbiota. pp. 22 Xenobiotic poisoning of specific and non-specific microbial pathways. pp. 15 Microbial toxicity testing of synthetic organic chemicals. pp. 11 Pesticide effects on non-target microorganisms in agricultural soils. pp. 6 Environmental risk assessment: the potential role of microbial effects testing. pp. 3 Introduction. pp. 1 |
| 出版: | Washington, D.C. : The Agency |