海州湾海洋牧场的长期环境效应研究

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Abstract In order to explore the long-term environmental effects of marine ranching in the Haizhou Bay, concentrations of total nitrogen (TN) and total phosphorus (TP) in sediments,active phosphate (PO₄^3--N)and total dissolved inorganic nitrogen (DIN) in seawater, and phytoplankton and zoobenthos were investigated in marine ranching and control areas from 2010 to 2015. The results showed that TN in marine ranching areas were accumulated with the presence of artificial reefs and the cultivation of mussels and seaweeds. TN were increased from 266.62mg/kg in 2010 to 596.21mg/kg in 2015. The high abundance of phytoplankton promoted the release of available phosphorus in sediments that collected from marine ranching and control areas. The concentration of TN in marine ranching area were decreased from 547.26mg/kg in 2010 to 317.25mg/kg in 2015, while the values were decreased from 438.21mg/kg in 2010 to 342.97mg/kg in 2015in the control area. The distribution of concentrations TP in marine ranching areas (547.26mg/kg) > control areas (438.21mg/kg) has been found to be changed to marine ranching areas (317.25mg/kg) < control areas (342.97mg/kg). The effect of zoobenthos on the nutrient exchange flux at the sediment-water interface has been determined not the dominant factor for variation of concentrations of TN and TP. The DIN in marine ranching area was susceptible to be TN. PO₄^3--N in the control areas was consistent with the change of TP in sediments. The high dissolved oxygen environment and the increase content of TN-N provided endogenous for marine ranching. Compared with the control areas, the N/P of marine ranching was closer to the optimum value, which showed marine ranching of Haizhou Bay had improved the local ecological and encirnomental quality.

Key words： environmental effects sediment nutrients marine ranching Haizhou Bay

Received: 28 May 2017

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X55

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	LI Da-peng
	ZHANG Shuo
	HUANG Hong

Cite this article:

LI Da-peng,ZHANG Shuo,HUANG Hong. Study on long-term environmental effects of marine ranching in Haizhou Bay[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(1): 303-310.

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2018/V38/I1/303

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