Download or read book Aquatic Disposal Field Investigations Duwamish Waterway Disposal Site Puget Sound Washington Appendix G Benthic Community Structural Changes Resulting from Dredged Material Disposal Elliott Bay Disposal Site written by and published by . This book was released on 1978 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Benthic community changes resulting from the open-water disposal of 114,350 cum of Duwamish River dredged material at the Elliott Bay, Puget Sound, deep-water (approximately 60 m) experimental disposal site, 7 February 1976 to 6 March 1976, were investigated. Analyses were performed on macrofaunal density, species composition, biomass, biomass/individual, frequency of occurrence, and species diversity, at several taxonomic levels for one predisposal sampling and five postdisposal samplings at 10 days, and 1, 3, 6 and 9 months after disposal. These analyses were performed on data from stratified (central, side, and corner) disposal site stations and two (east and west) reference sites. Taxonomic levels investigated were total benthic macrofauna, macrofaunal groups (gastropods, pelecypods, errantian worms, sedentarian worms, and miscellaneous species), and individual species. Most individual species showed seasonal trends (both graphically and statistically) at the reference sites and the corner disposal site stations, indicating that rate of benthic macrofaunal recovery from dredged material disposal may be affected by seasonal parameters. Therefore, timing of dredged material disposal on similar sites may be important in reducing the severity of impact on the benthic macrofauna.
Download or read book Aquatic Disposal Field Investigations Duwamish Waterway Disposal Site Puget Sound Washington written by C. Rex Bingham and published by . This book was released on 1978 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aquatic Disposal Field Investigations Duwamish Waterway Disposal Site Puget Sound Washington written by C. Rex Bingham and published by . This book was released on 1978 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Benthic community changes resulting from the open-water disposal of 114,350 cum of Duwamish River dredged material at the Elliott Bay, Puget Sound, deep-water (approximately 60 m) experimental disposal site, 7 February 1976 to 6 March 1976, were investigated. Analyses were performed on macrofaunal density, species composition, biomass, biomass/individual, frequency of occurrence, and species diversity, at several taxonomic levels for one predisposal sampling and five postdisposal samplings at 10 days, and 1, 3, 6 and 9 months after disposal. These analyses were performed on data from stratified (central, side, and corner) disposal site stations and two (east and west) reference sites. Taxonomic levels investigated were total benthic macrofauna, macrofaunal groups (gastropods, pelecypods, errantian worms, sedentarian worms, and miscellaneous species), and individual species. Most individual species showed seasonal trends (both graphically and statistically) at the reference sites and the corner disposal site stations, indicating that rate of benthic macrofaunal recovery from dredged material disposal may be affected by seasonal parameters. Therefore, timing of dredged material disposal on similar sites may be important in reducing the severity of impact on the benthic macrofauna.
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