王小冬, 刘兴国, 顾兆俊, 曾宪磊, 李月, 魏布. 曝气对蓝藻门微囊藻属水华形成过程的影响[J]. 南方水产科学, 2019, 15(2): 29-37. DOI: 10.12131/20180178
引用本文: 王小冬, 刘兴国, 顾兆俊, 曾宪磊, 李月, 魏布. 曝气对蓝藻门微囊藻属水华形成过程的影响[J]. 南方水产科学, 2019, 15(2): 29-37. DOI: 10.12131/20180178
WANG Xiaodong, LIU Xingguo, GU Zhaojun, ZENG Xianlei, LI Yue, WEI Bu. Effect of aeration on formation of cyanobacterial (Microcystis spp.) blooms[J]. South China Fisheries Science, 2019, 15(2): 29-37. DOI: 10.12131/20180178
Citation: WANG Xiaodong, LIU Xingguo, GU Zhaojun, ZENG Xianlei, LI Yue, WEI Bu. Effect of aeration on formation of cyanobacterial (Microcystis spp.) blooms[J]. South China Fisheries Science, 2019, 15(2): 29-37. DOI: 10.12131/20180178

曝气对蓝藻门微囊藻属水华形成过程的影响

Effect of aeration on formation of cyanobacterial (Microcystis spp.) blooms

  • 摘要: 为研究曝气是否会促进池塘蓝藻门微囊藻属(Microcystis)水华的发生,于夏季在温室内用玻璃缸进行了实验。实验设1个处理组和1个对照组,均不添加沉积物,各组3个重复。对照组不曝气,处理组进行水产养殖池塘中常见强度的曝气,对照组和处理组均添加2次相同的无机氮(N)、磷(P)营养盐。初始时浮游植物以绿藻为优势,随后对照组和处理组中均逐渐形成微囊藻属优势,其在实验后期成为优势最大的种类 (平均湿质量浓度为36.28~75.81 mg·L–1)。对照组的溶解氧质量浓度显著高于处理组(P<0.05),叶绿素a、浮游植物总湿质量浓度、蓝藻湿质量浓度、绿藻湿质量浓度、微囊藻占藻类总湿质量的比例以及浮游动物等均无显著差异(P>0.05)。表明曝气对浮游植物由绿藻门优势向微囊藻优势的转变,即微囊藻水华的形成过程无直接影响;曝气是否存在均可以形成微囊藻优势;曝气主要改变了微囊藻在水中的分布。

     

    Abstract: In order to study whether aeration will promote the occurrence of cyanobacterial (Microcystis spp.) blooms in aquaculture ponds, we conducted an experiment (a treatment group and a control group) in a greenhouse during summer, without sediment addition and three replicates of glass tanks. The control group was not aerated, but the treatment group was aerated with common aeration intensity for aquaculture ponds. Inorganic nitrogen and phosphorus nutrients were added to both the control and the treatment groups twice. The initial phytoplankton was dominated by green algae, then Microcystis gradually appeared in both two groups, and then became the most dominant species at later stage of the experiment (average wet mass of 36.28−75.81 mg·L–1). The dissolved oxygen mass concentration in the control was significantly higher than that in the treatment (P<0.05); however, there was no significant difference between both groups (P>0.05), including chlorophylla, total algal wet mass, cyanobacteria wet mass, green algae wet mass, proportion of Microcystis to the total wet mass, as well as zooplankton contents. It is indicated that aeration disturbance in aquaculture ponds has no direct influence on the occurrence of Microcystis dominance, which can appear either at the presence or absence of aeration disturbance, and the aeration disturbance mainly changes the position of Microcystis colonies in the water column.

     

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