Title: Impact of Huge Ocean Engineering on Distribution Characteristics of Macrobenthos in Waters Around Yangshan Islands in Hangzhou Bay
Abstract: As a living place of various fishes,shrimps,crabs and parrs,and famous for the Zhoushan Fishing Ground,the Hangzhou Bay ecosystem has the typical flimsiness and complexities.In recent years,a series of ocean engineering started at Hangzhou Bay and were put into use.Benthos has the direct or the indirect relationship with many physical and chemical processes of Hangzhou Bay ecosystem.From 2001 to 2005,an oceanographic comprehensive survey in 20 sampling sites was carried out in waters around the area of Yangshan Islands in Hangzhou Bay(30°32'~30°50'N,121°53'~122°17'E)during the months of February,May and August,representing winter,spring and autumn,respectively.The infauna and epifauna were the main survey contents.There were 31 species of infauna in the 3 years and the species number,biomass and the species diversity declined from 2003 to 2005.Shannon-Wiener indexes of infauna,from 2003 to 2005,were less than 1.00,which indicated that the bottom in research area was polluted.The community of infauna presented simplification.Compared with that in 1982,the biomass raised 2~4 times.In 4 years of 2001,2003,2004 and 2005,the total number of epifauna species was 77,but the biomass increased in 2003 and dropped later.There were 16 dominant species(Y≥0.02)and the obvious annual change of dominant species was observed.Shannon-Wiener index slightly declined from 2001 to 2005(no survey in 2002).The disturbance of the Yangshan engineering made the benthos habitat fragmentate and the stabilization of benthos community structure descended.
Publication Year: 2007
Publication Date: 2007-01-01
Language: en
Type: article
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Cited By Count: 2
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