抚宁扇贝养殖区营养盐及浮游植物变化研究

doi:10.16378/j.cnki.1003-1111.21129

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Abstract In order to study the variation characteristics of nutrients and phytoplankton in the scallop culture sea area in Funing Bay, Hebei Province, China and to explore the correlation between nutrient concentrations and phytoplankton species and density from May to November 2020, of 0 km water quality indicators and species composition and density of phytoplankton were monthly monitored 0, 0.3, 4.6, and 11.1 km of the scallop culture sea area in Funing Bay, Hebei Province, China from May to November 2020. The results showed that the water temperature changes at all stations were consistent; there were higher contents of chemical oxygen demand, active phosphate, nitrite nitrogen, nitrate nitrogen, ammonia nitrogen, and active silicate on the 0 km than those in other stations, and the salinity, and pH lower than those in other sites. From May to November, the COD concentration was ranged from 0.260 to 3.460 mg/L;, with the maximal concentrations of both active phosphate (0.044 mg/L) and active silicate (7.174 mg/L) in July. The variation ranges of concentrations were 0—0.101 mg/L in nitrite nitrogen and 0.052—1.578 mg/L in nitrate nitrogen and 0—0.096 mg/L in ammonia nitrogen. A total of 102 species phytoplankton in 56 genera were identified, including Bacillariophyta, Pyrrophyta, Chlorophyta, Cyanophyta, Cryptophyta, Euglenophyta, and Chrysophyta. There was higher density of phytoplankton at the 0 km and 0.3 km than that in 4.6 and 11.1km. The density variation range was shown to be 8.3×10⁴—445.6×10⁴ pcs/L at each station, with the dominant species of Skeletonema costatum, Cyclotella striata, Navicula sp., and Leptocylindrus danicus.The dominant species of Chlorophyta in the surveyed sea area was significantly positively correlated with nitrate nitrogen (P<0.05). The findings can provide data reference with the bay scallop culture industry in the sea area of Hebei Province.

Key words： Funing nutrient phytoplankton

Received: 20 July 2021

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	Articles by authors
	BU Shixun
	ZHANG Fuchong
	FANG Xiao
	LI Yongren

Cite this article:

BU Shixun,ZHANG Fuchong,FANG Xiao, et al. Changes in Nutrient Concentrations and Species Composition and Density of Phytoplankton in Funing Scallop Culture Area[J]. Fisheries Science, 2023, 42(6): 1015-1024.

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https://www.shchkx.com/EN/10.16378/j.cnki.1003-1111.21129 OR https://www.shchkx.com/EN/Y2023/V42/I6/1015

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