The community structure and spatial-temporal distribution of plankton in shellfish beds in coastal Huludao

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Journal of Dalian Fisheries University ›› 2013, Vol. 28 ›› Issue (2) : 199-205.

CHEN Lei,XU Chuan-cai,LIU Hai-ying,XING Bin-bin,TIAN Tao,SUN Kang

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Abstract

The water environment and plankton were surveyed at 10 sample stations in shellfish beds in coastal Huludao,Liaoning province in November 19,2007,March 21,2008 and July 20,2008.The results showed that the seawater was found to be the first class in terms of pH and dissolved oxygen levels.Judging from the inorganic nitrogen levels,however,the seawater was between the second and the fourth class,and between the first and the second class from the active phosphorus levels.The even distribution of nitrogen and phosphorus levels were observed in the region and the phosphorus was found to be limiting factor,with N/P value of 221.4 in November,2007, 86.0 in March 2008,and 51.5 in July,2008.A total of 46 phytoplankton species and 23 zooplankton species were found in the shellfish beds,including 41 species of diatoms,5 species of dinoflagellates,1 species of Chaetognatha, 1 species of Tunicata,11 species of Copepoda,and 10 species of pelagic larvae.Forty phytoplankton species were observed in November 19,2007,37 phytoplankton species in March,2008,and 43 phytoplankton species in July, 2008.There were 23 zooplankton species identified in November,2007,and 15 zooplankton species in March 21, 2008,with the peak abundance and biomass of plankton in July,2008,and the minimum in March,2008.The biodiversity index was changed from 3.34 to 3.94 in phytoplankton,and changed from 2.92 to 3.90 in zooplankton,indicating that the water quality in this area was somewhat pollution or pollution-free.

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Huludao / shellfish bed / water environment / plankton / community structure / spatial-temporal distribution

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CHEN Lei, XU Chuan-cai, LIU Hai-ying, XING Bin-bin, TIAN Tao, SUN Kang. The community structure and spatial-temporal distribution of plankton in shellfish beds in coastal Huludao[J]. Journal of Dalian Fisheries University, 2013, 28(2): 199-205