Su Yuping, You Xuejing, Lin Hui, Zhuang Huiru, Weng Yuan, Zhang Dayi
a Environmental Science and Engineering College , Fujian Normal University , Fuzhou 350007 , People's Republic of China.
b Lancaster Environment Centre , Lancaster University , Lancaster LA1 4YW , UK.
Environ Technol. 2016;37(6):641-51. doi: 10.1080/09593330.2015.1076056. Epub 2015 Sep 11.
This study investigated the impact of four environmental factors on the recruitment of cyanobacteria from bottom sediments in the eutrophic Shanzi Reservoir. Temperature and light were identified as the key determinants for the recruitment of Microcystis and Oscillatoria. Cyanobacteria became dominant at higher temperature (20 °C) and light intensity (2000 lx) and Microcystis and Oscillatoria were the major species. Detailed recruitment simulation undertaken with the respective gradients of temperature and light suggested that both Microcystis and Oscillatoria are temperature sensitive and that their critical temperature point was 10 °C. However, distinct light impacts were observed only on Microcystis. The recruitment of Oscillatoria was light independent, whereas Microcystis had a positive relationship with light intensity. Physical disturbance promoted Microcystis recruitment and also affected the structure of the recruited cyanobacterial community at the water-sediment interface, based on quantitative polymerase chain reaction (qPCR) and phylogenetic analysis.
本研究调查了四种环境因素对富营养化的山仔水库底泥中蓝藻复苏的影响。温度和光照被确定为微囊藻和颤藻复苏的关键决定因素。在较高温度（20°C）和光照强度（2000 lx）下蓝藻占主导地位，微囊藻和颤藻为主要物种。利用温度和光照各自的梯度进行的详细复苏模拟表明，微囊藻和颤藻均对温度敏感，其临界温度点为10°C。然而，仅观察到光照对微囊藻有明显影响。颤藻的复苏与光照无关，而微囊藻与光照强度呈正相关。基于定量聚合酶链反应（qPCR）和系统发育分析，物理扰动促进了微囊藻的复苏，也影响了水 - 沉积物界面处复苏的蓝藻群落结构。
