摘要
为了解凡纳滨对虾(Litopenaeus vannamei)淡水养殖池塘浮游植物的固碳量,探明水质、浮游植物与固碳量之间的关系,采用黑白瓶法对上海市奉贤区某水产养殖场的凡纳滨对虾养殖池塘水体初级生产力进行了检测,并对浮游植物固碳量进行估算。结果显示,3口池塘共观察到浮游植物7门45属,其中绿藻门、蓝藻门、硅藻门、裸藻门、金藻门、甲藻门和隐藻门分别有19、8、11、3、2、1和1个属。Ⅰ、Ⅱ和Ⅲ号塘内浮游植物密度分别为(7.99±7.84)×10^(5)、(1.86±1.55)×10^(6)和(2.57±1.66)×10^(6) ind./L,随着养殖时间的延长,各池塘浮游植物密度基本呈现先增大后减小的趋势。3口池塘的共同优势属有4种,分别为栅藻、颤藻、舟形藻和小环藻。养殖期间浮游植物当日单位面积固碳量(D_(CS))变化范围为0.27~4.92 g C/(m^(2)·d),均值为(1.62±1.12)g C/(m^(2)·d),浮游植物的累积固碳量随养殖时间的延长而缓慢增长,养殖结束时,3口试验塘的累积固碳量分别为0.80、1.11和1.31 t C。多元逐步回归分析结果显示,叶绿素a(Chl.a)、总氮(TN)、温度(T)、pH、裸藻门和蓝藻门是影响D_(CS)的主要环境因子;Pearson相关性分析与冗余分析表明:Chl.a、TN、T、裸藻门和蓝藻门是影响浮游植物固碳量的关键因子。这些结果有助于深入理解凡纳滨对虾养殖池塘中水质和浮游植物群落对浮游植物固碳量的影响。
In order to understand the carbon sequestration of phytoplankton in freshwater aquaculture ponds of Litopenaeus vannamei and to find out the relationship among water quality,phytoplankton and carbon sequestration,the primary productivity of the water of Litopenaeus vannamei aquaculture ponds in Fengxian District,Shanghai was detected by black and white bottle method,and the carbon sequestration of phytoplankton was estimated.The results showed that a total of 45 genera belonging to 7 phylum of phytoplankton were observed in the three ponds,including 19,8,1l,3,2,1 and 1 genera of Chlorophyta,Cyanophyta,Bacillariophyta,Euglenophyta,Chrysophyta,Dinophyta and Cryptophyta,respectively.The phytoplankton densities in pond Ⅰ,Ⅱ and Ⅲ were(7.99±7.84)×10^(5),(1.86±1.55)×10^(6) and(2.57±1.66)×10^(6) ind/L,respectively.There were four species of common dominance in the three ponds,namely Scenedesmus,Oscillatoria,Navicula and Cyclotella.The variation range of daily carbon sequestration per unit area(Des)of phytoplankton was 0.27-4.92 g C/(m^(2)·d),the average value was(1.62±1.12)g C/(m^(2)·d),the cumulative carbon sequestration of phytoplankton increased slowly with the extension of the cultivation time during the whole cultivation period,and the cumulative carbon sequestration of the 3 experimental ponds was 0.80,1.11l and 1.31 t C at the end of aquaculture.The results of multiple stepwise regression analysis showed that Chlorophylla(Chl.a),Total Nitrogen(TN),Temperature(T),pH,phytoplankton Euglenophyta and Cyanophyta were the main environmental factors affecting the Ds of phytoplankton.Pearson correlation analysis and redundancy analysis showed that Chl.a,TN,T,Euglenophyta and Cyanophyta were the key factors affecting the carbon sequestration of phytoplankton,and these results were helpful for us to understand the effects of water quality and phytoplankton community on the carbon sequestration of phytoplankton in Litopenaeus vannamei fresh water aquaculture ponds.
作者
李桂娟
江敏
吴昊
周英娴
王智华
LI Guijuan;JIANG Min;WU Hao;ZHOU Yingxian;WANG Zhihua(College of Oceanography and Ecological Science,Shanghai Ocean University,Shanghai 201306,China;Shanghai University Engineering Research Center for Water Environment Ecology,Shanghai Ocean University,Shanghai 201306,China;College of Fisheries and Life Science,Shanghai Ocean University,Shanghai 201306,China)
出处
《上海海洋大学学报》
北大核心
2025年第4期729-740,共12页
Journal of Shanghai Ocean University
基金
上海市虾类产业技术体系建设项目(沪农科产字[2022]第5号)。
关键词
凡纳滨对虾
淡水养殖
浮游植物
固碳
Litopenaeus vannamei
fresh water aquaculture
phytoplankton
carbon sequestration
