打虎石水库浮游生物群落结构特征及鱼产力评估

doi:10.16378/j.cnki.1003-1111.20214

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Abstract In order to explore the phytoplankton community structure characteristics such as species composition, density and biomass in Dahushi Reservoir, and to evaluate the water trophic status and estimate the fish productivity in the reservoir by using the phytoplankton diversity indices, the phytoplankton was investigated and analyzed in May, July and September 2018. The results showed that there were 57 species/genera of phytoplankton in the reservoir, among which Chlorophyta was the most abundant, with 22 species/genera accounting for 38.60%. The average density and biomass of phytoplankton were 7.5465×10⁶ cell/L and 3.11 mg/L, respectively. A total of 39 species/genera of zooplankton were detected, among which rotifers were the most abundant, accounting for 48.72%. The average density and biomass of of zooplankton were 1924.54 ind./L and 1.34 mg/L, respectively. The water quality of Dahushi Reservoir was moderate trophic status according to Shannon Wiener diversity index (H′), Pielou evenness index (J) and Margalef richness index (d). The fish productivity was estimated to be 336.63 kg/hm² based on the results of plankton survey. The findings showed that the utilization rate of food organism in the reservoir was low, and that the stocking amount of silver carp Hypophthalmichthys molitrix and bighead carp Aristichthys nobilis was appropriately increased to control the increase in plankton quantity and biomass in the reservoir and further to prevent the eutrophication of water.

Key words： Dahushi Reservoir phytoplankton community structure fish productivity

Received: 25 September 2020

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	Articles by authors
	SHAO Xudong
	LI Yichao
	BAI Lujun
	ZHOU Bobo
	WANG Fangfang
	LIU Qing

Cite this article:

SHAO Xudong,LI Yichao,BAI Lujun, et al. Community Structure Characteristics of Phytoplankton and Estimation of Fish Productivity in Dahushi Reservoir[J]. Fisheries Science, 2022, 41(3): 467-474.

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https://www.shchkx.com/EN/10.16378/j.cnki.1003-1111.20214 OR https://www.shchkx.com/EN/Y2022/V41/I3/467

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