Topic
Dredging
About: Dredging is a research topic. Over the lifetime, 3300 publications have been published within this topic receiving 28325 citations.
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TL;DR: In this article, a survey of benthic macrofauna in the vicinity of a coastal marine aggregate dredging site off the south coast of UK was carried out in 1999.
Abstract: A survey of benthic macrofauna in the vicinity of a coastal marine aggregate dredging site off the south coast of UK was carried out in 1999. The object of the survey was to determine impact of marine aggregate dredging on community composition, the extent of impact outside the boundaries of the dredge site, and the rate of recolonization and recovery of the fauna following cessation of dredging. Part of the site was intensively dredged by vessels at anchor whilst other parts were less intensively exploited by trailer dredger. The impact of dredging within the intensively exploited anchor dredge site was limited to the dredged area. Impacts included a suppression of species variety, population density and biomass, as well as differences in species composition compared with the surrounding deposits. In contrast, trailer dredging had no impact on community composition of macrofauna within the dredge site. No suppression of benthic community structure was recorded beyond 100 m from the dredge site. ...
90 citations
01 Jan 2005
TL;DR: In this paper, the impacts of trawling and scallop dredging on benthic habitats and communities were investigated, and the authors found that trawler trawlers and scailops are a major cause of damage.
Abstract: Impacts of trawling and scallop dredging on benthic habitats and communities , Impacts of trawling and scallop dredging on benthic habitats and communities , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
89 citations
TL;DR: Seiderer et al. as mentioned in this paper investigated the relationship between biological community structure and particle size composition in coastal deposits off the southeast of England and found that there is little evidence of a close correspondence between the distribution of different sediment types and benthic communities in the survey area: comparison of the similarity matrices yields weighted Spearman rank correlation of less than 0.37.
Abstract: Seiderer, L. J. and Newell, R. C. 1999. Analysis of the relationship between sediment composition and benthic community structure in coastal deposits: Implications for marine aggregate dredging. – ICES Journal of Marine Science, 56: 757–765. The relationship between biological community structure and particle size composition is investigated in coastal deposits off the southeast of England. Sediments in the survey area fall into well-defined groups when analysed by multivariate techniques, indicating similarities and differences which could not be identified by mere inspection of the data. Biological resources also fall into relatively distinct groups, or communities, when analysed for species composition and population density, although similarity within the groups is lower than that obtained for the sediments. There is, however, little evidence of a close correspondence between the distribution of different sediment types and benthic communities in the survey area: comparison of the similarity matrices yields weighted Spearman rank correlation of less than 0.37. This suggests that factors other than sediment composition play a significant part in controlling biological community structure on the seabed. Still, there is evidence that some species such as the tube-dwelling worm Sabellaria spinulosa are associated mainly with sands and gravels whilst fine mobile silts and sands are characterized by ‘‘opportunistic’’ species such as the tube-worm Lagis koreni. The results suggest that although modification of sediment composition from mixed sands and gravels to silts would be expected to result in colonization by ‘‘opportunistic’’ species capable of survival in mobile deposits, restoration of sediment composition after cessation of dredging for marine aggregates is not, within broad limits, a prerequisite for establishment of biological communities which are comparable with those that occurred in the deposits prior to dredging. 1999 International Council for the Exploration of the Sea
87 citations
TL;DR: The dredging environmental impacts and its two important factors, dredging technology and sediment characteristic, that determine the magnitude of impacts are reviewed through literature review, and the need for a more integrated dredgingEnvironmental management to be developed for developing nations is discussed.
87 citations
TL;DR: The results indicated that dredge-spoil dumping had no detectable effect on either the structure of the invertebrate community or the physical characteristics of sediment at the receiving site, suggesting that the disposal strategy was one which minimized impacts within an area which has high conservation value and should thus be adopted as a model for future works within the region.
84 citations