Impact of Dredging on Sediment of Krishnapatnam Port, East Coast of India： Implications for Marine Biodiversity
Impact of Dredging on Sediment of Krishnapatnam Port, East Coast of India： Implications for Marine Biodiversity作者机构：Department of Geology ＆ Geoinformatics Yogi Vemana University Kadapa 516003 India Department of Geology Sri Venkateswara University Tirupati 517502 India
出 版 物：《Journal of Environmental Science and Engineering》 (环境科学与工程（英文版）)
年 卷 期：2010年第4卷第8期
页 面：66-75页
学科分类：070703[理学-海洋生物学] 07[理学] 0707[理学-海洋科学] 08[工学] 0815[工学-水利工程]
主 题：Foraminifera. sediment dredging ecological impact krishnapatnam port east coast of India.
摘 要：This paper synthesizes the extent and nature of scientific information about how dredging activities potentially affect habitats and key ecological functions supporting recruitment and sustainability of estuarine and marine environment. Fourteen samples were collected after dredging （2008） from fixed sampling stations. The impact on community was estimated at species level （Foraminifera, Protozoan, using statistical analysis）. The maximum negative effect on benthic foraminifera was reduction by 60%, for species richness and by 50% for diversity. This data were compared with the data obtained before dredging （2006） in a time services spanning 2 years. Its revealed that reestablishment of directly with in less than 3 months of the end of dredging, although affected foraminifera and of physico-chemical substrate characteristic 2 years later there was a considerable improvement of whole faunal community. Statistical treatment was given to the data sets to know the relation among parameters. Before, this type of activity is undertaken, each case should be studied regarding viability, the environmental medium where it will take place, the best time of year, and the type of dredging to be used. Small-patch dredging operations are proposed when ever possible, since they allow a quick readjustment of the initial sediment structure and benthic foraminifera. These findings will help to underpin improved planning of management strategies for dredging operations in India and other countries.
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