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朱宇轩, 米武娟, 李波, 梁建奎, 宋高飞, 毕永红. 南水北调中线干渠两个水工构筑物对着生藻类群落的影响[J]. 水生生物学报, 2021, 45(4): 817-825. DOI: 10.7541/2021.2020.107
引用本文: 朱宇轩, 米武娟, 李波, 梁建奎, 宋高飞, 毕永红. 南水北调中线干渠两个水工构筑物对着生藻类群落的影响[J]. 水生生物学报, 2021, 45(4): 817-825. DOI: 10.7541/2021.2020.107
ZHU Yu-Xuan, MI Wu-Juan, LI Bo, LIANG Jian-Kui, SONG Gao-Fei, BI Yong-Hong. THE INFLUENCES OF TWO HYDRAULIC STRUCTURES ON PERIPHYTIC ALGAL COMMUNITIES IN THE MIDDLE CHANNEL OF THE SOUTH-TO-NORTH WATER DIVERSION PROJECT[J]. ACTA HYDROBIOLOGICA SINICA, 2021, 45(4): 817-825. DOI: 10.7541/2021.2020.107
Citation: ZHU Yu-Xuan, MI Wu-Juan, LI Bo, LIANG Jian-Kui, SONG Gao-Fei, BI Yong-Hong. THE INFLUENCES OF TWO HYDRAULIC STRUCTURES ON PERIPHYTIC ALGAL COMMUNITIES IN THE MIDDLE CHANNEL OF THE SOUTH-TO-NORTH WATER DIVERSION PROJECT[J]. ACTA HYDROBIOLOGICA SINICA, 2021, 45(4): 817-825. DOI: 10.7541/2021.2020.107

南水北调中线干渠两个水工构筑物对着生藻类群落的影响

THE INFLUENCES OF TWO HYDRAULIC STRUCTURES ON PERIPHYTIC ALGAL COMMUNITIES IN THE MIDDLE CHANNEL OF THE SOUTH-TO-NORTH WATER DIVERSION PROJECT

  • 摘要: 在南水北调中线干渠两个水工构筑物沙河渡槽与穿黄工程渠段分别设置沙河渡槽上游明渠、沙河渡槽入口、沙河渡槽出口、穿黄工程入口、穿黄工程出口、穿黄工程下游明渠和穿黄工程下游沁河倒虹吸7个监测位点, 对着生藻类群落与水质指标进行了原位同步监测。结果表明: 监测位点的蓝藻优势种有鞘丝藻(Leptolyngbya sp.)、聚球藻(Synechococcus sp.)、眉藻(Calothrix sp.)、席藻(Phormidium sp.)、集胞藻(Synechocystis sp.)和拟色球藻(Chroococcidiopsis sp.)等; 真核藻类优势种有链带藻(Desmodesmus sp.)、土佐牧野藻(Makinoella sp.)、芒球藻(Radiococcus sp.)、盘星藻(Monactinus sp.)、卵囊藻(Oocystella sp.)、菱形藻(Nitzschia sp.)、针杆藻(Synedra sp.)和肘形藻(Ulnaria sp.)等。经过渡槽后藻类生物量下降50%, 藻类种类数下降16%; 经过穿黄工程后藻类生物量下降80%, 藻类种类数下降18%。经过沙河渡槽后, 真核藻类中链带藻(Desmodesmus sp.)相对丰度由26.4%增至77.4%, 针杆藻(Synedra sp.)相对丰度由10.4%降至0.4%, 肘形藻(Ulnaria sp.)相对丰度由2.3%降至0.4%; 经过穿黄工程后, 鞘丝藻(Leptolyngbya sp.)相对丰度由82.6%降至56.5%, 胶须藻(Rivularia sp.)相对丰度由6.2%增至61.8%。水工构筑物通过影响水流条件和水质改变微生境从而对着生藻类群落结构产生显著影响, 研究有助于深入了解着生藻类群落特点及水工构筑物对其具体影响。

     

    Abstract: In the middle channel of the South-to-North Water Diversion Project, 7 sampling sites were set up in the channel section of two hydraulic structures, Shahe aqueduct and Yellow River crossing project, including the upstream of the Shahe aqueduct, the inlet of the Shahe aqueduct, the outlet of the Shahe aqueduct, the inlet of the Yellow River crossing project, the outlet of the Yellow River crossing project, the downstream of the Yellow River crossing project, and Qinhe inverted-siphons downstream of the Yellow River crossing project, to synchronously monitor the periphytic algal communities and water quality parameters. The results showed that the dominant species of Cyanophyta were Leptolyngbya sp., Synechococcus sp., Calothrix sp., Phormidium sp., Synechocystis sp., and Chroococcidiopsis sp.. The dominant eukaryotic algal species were Desmodesmus sp., Makinoella sp., Radiococcus sp., Monactinus sp., Oocystella sp., Nitzschia sp., Synedra sp., and Ulnaria sp.. After the Shahe aqueduct, the biomass decreased by 50% and the number of algal species decreased by 16%. After the Yellow River crossing conveyance, the biomass decreased by 80% and the number of algal species decreased by 18%. After the Shahe aqueduct, the abundance of Desmodesmus sp. decreased from 26.4% to 77.4%, the abundance of Synedra sp. decreased from 10.4% to 0.4%, and the abundance of Ulnaria sp. decreased from 2.3% to 0.4%. The Yellow River crossing project reduced abundance of Leptolyngbya sp. from 82.6% to 56.5% and increased the abundance of Rivularia sp. from 6.2% to 61.8%. These results indicated that hydraulic structures significantly mediated algal communities by changing microhabitats through flow condition and water quality. This study is helpful to understand the influence of hydraulic structure on algal community.

     

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