Zhao Lu, Geng Xianhui, Zhang Yan, Hu Xiaowen, Zhang Xinming, Xu Henglong, Yang Guanpin, Pan Kehou, Jiang Yong
College of Marine Life Sciences & Institute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao, China.
College of Marine Engineering, RIZHAO Polytechnic, Rizhao, China.
Environ Sci Pollut Res Int. 2022 May;29(21):32171-32179. doi: 10.1007/s11356-021-18123-9. Epub 2022 Jan 11.
Microalgae have significant amounts of proteins, lipids, carotenoids, vitamins, minerals, and unique pigments. However, with the gradual expansion of microalgae cultivation, hostile biological pollution seriously restricted the large-scale microalgae cultivation and limited the exploitation of its biological resources. Moreover, protozoan poses the greatest threat to microalgae cultivation. Here, the relationship between six marine economic microalgae populations and their ciliate predator Euplotes vannus was examined. And four concentrations were designed for each type of microalgae to carry out the experiment. It was revealed that four species of microalgae inhibit the ciliate population growth at high density. Furthermore, the experiment which was the influence of microalgae at three different growth stages on the growth of the ciliates for these four kinds of high-density inhibitory microalgae was designed. The microalgae inhibitory effects were already exhibited at the end of the exponential growth phase, and it was significantly inhibited during the stationary growth phase. As the microalgae concentration increased, the inhibitory effect became more pronounced. This study provides fundamental data for screening protozoan-inhibiting microalgae and shows potential to be used in algae cultivation.
微藻含有大量蛋白质、脂质、类胡萝卜素、维生素、矿物质和独特的色素。然而，随着微藻养殖的逐步扩大，有害生物污染严重制约了微藻的大规模养殖，并限制了其生物资源的开发利用。此外，原生动物对微藻养殖构成的威胁最大。在此，研究了六种海洋经济微藻种群与其纤毛虫捕食者扇形游仆虫之间的关系。并且为每种微藻设计了四个浓度来进行实验。结果表明，四种微藻在高密度时会抑制纤毛虫种群的增长。此外，针对这四种高密度抑制性微藻，设计了微藻在三个不同生长阶段对纤毛虫生长影响的实验。微藻的抑制作用在指数生长期末期就已显现，在稳定生长阶段受到显著抑制。随着微藻浓度的增加，抑制作用变得更加明显。本研究为筛选抑制原生动物的微藻提供了基础数据，并显示出在藻类养殖中的应用潜力。
