张晓蕾, 王强, 张国奇, 周陆, 李廷发, 张玉, 赵思雅. 池塘循环流水养殖模式中浮游植物群落结构的空间变化研究[J]. 南方水产科学, 2021, 17(3): 36-45. DOI: 10.12131/20210004
引用本文: 张晓蕾, 王强, 张国奇, 周陆, 李廷发, 张玉, 赵思雅. 池塘循环流水养殖模式中浮游植物群落结构的空间变化研究[J]. 南方水产科学, 2021, 17(3): 36-45. DOI: 10.12131/20210004
ZHANG Xiaolei, WANG Qiang, ZHANG Guoqi, ZHOU Lu, LI Tingfa, ZHANG Yu, ZHAO Siya. Spatial variation of phytoplankton community structure of in-pond raceway system[J]. South China Fisheries Science, 2021, 17(3): 36-45. DOI: 10.12131/20210004
Citation: ZHANG Xiaolei, WANG Qiang, ZHANG Guoqi, ZHOU Lu, LI Tingfa, ZHANG Yu, ZHAO Siya. Spatial variation of phytoplankton community structure of in-pond raceway system[J]. South China Fisheries Science, 2021, 17(3): 36-45. DOI: 10.12131/20210004

池塘循环流水养殖模式中浮游植物群落结构的空间变化研究

Spatial variation of phytoplankton community structure of in-pond raceway system

  • 摘要: 基于集约化生产的池塘循环流水养殖系统 (In-pond raceway system, IPRS) 是一种新兴的养殖模式,为进一步了解该系统水体循环过程中的生态结构动态,揭示系统内净水区水质的变化特点,文章研究了养殖草鱼 (Ctenopharyngodon idella) 的池塘循环流水系统中生长季浮游植物群落结构的空间变化特征,并通过冗余分析研究了浮游植物群落结构变化与环境因子的关系。该系统在生长季共鉴定出浮游植物7门99种,主要由蓝藻门、绿藻门、硅藻门、裸藻门、隐藻门、甲藻门和金藻门组成。其中绿藻门种类数最多 (54种),其次为蓝藻门 (18种)。系统中不同区域的浮游植物群落结构不同,净化区中段浮游植物的密度及生物量最高,净化区蓝藻门的密度及生物量较养殖区有所增加。池塘不同区域的蓝藻门相对密度均远高于绿藻门及硅藻门。从净化区前端至后端,蓝藻门的相对密度逐渐增加,绿藻及硅藻的相对密度逐渐下降。冗余分析结果显示,影响循环系统中浮游植物群落结构变化的主要环境因子是温度和氮、磷营养盐。

     

    Abstract: The in-pond raceway system (IPRS) based on intensive production of ponds is an emerging aquaculture model. In order to further understand the ecological structure dynamics of this system's water body circulation process and to reveal the change characteristics of water quality in purification area, we studied the spatial variability of phytoplankton community structure and the relationship between the phytoplankton community structure changes and the environmental factors by Redundancy Analysis (RDA) during the growing season in IPRS of grass carp (Ctenopharyngodon idella). The system identified 99 species of phytoplankton in seven phyla, mainly including Cyanophyta, Chlorophyte, Bacillariophyta, Euglenophyta, Cryptophyta, Pyrrophyta and Chrysophyta. Chlorophyta had the largest number of species (54 species), followed by Cyanophyta (18 species). In this system, the phytoplankton community structure in different areas was different. The density and biomass of phytoplankton in the middle of the purification area were the highest, and those of Cyanophyta in the purification area were higer than that in the culture area. The relative density of Cyanophyta in different areas was much higher than those of Chlorophyta and Bacillariophyta. From the front to the back of the purification zone, the relative density of Cyanophyta gradually increased, while those of Chlorophyta and Bacillariophyta gradually decreased. The results of RDA show that the main environmental factors that affect the changes in the phytoplankton community structure in the system are temperature, nitrogen and phosphorus nutrients.

     

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