Chun Seong-Jun, Cui Yingshun, Lee Chang Soo, Cho A Ra, Baek Kiwoon, Choi Ahyoung, Ko So-Ra, Lee Hyung-Gwan, Hwang Seungwoo, Oh Hee-Mock, Ahn Chi-Yong
Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, South Korea.
Department of Environmental Biotechnology, KRIBB School of Biotechnology - Korea University of Science and Technology (UST), Daejeon, South Korea.
Front Microbiol. 2019 Jul 17;10:1637. doi: 10.3389/fmicb.2019.01637. eCollection 2019.
To elucidate the interspecies connectivity between cyanobacteria and other bacteria (non-cyanobacteria) during cyanobacterial harmful algal blooms (cyanoHABs), samples were collected from the Nakdong River, Korea, from June 2016 to August 2017, and microbial recurrent association network (MRAN) analysis was performed to overcome the limitations of conventional network analysis. blooms were tightly linked with in summer and were accompanied by significant changes in the non-cyanobacterial community composition (nCCC) compared to non-bloom period. Riverine bacterial communities could be clearly separated into modules that were involved in the formation, maintenance, and decomposition of cyanoHABs. and were directly linked with major cyanobacteria and assigned to connector and module hub in cyanoHABs-related modules, respectively. The functional profiles of the cyanoHABs-related modules suggested that nitrate reduction, aerobic ammonia oxidation, fermentation, and hydrocarbon degradation could be increased during the bloom periods. In conclusion, MRAN analysis revealed that specific bacteria belonging to cyanoHABs-related module, including connectors and module hubs, appeared to contribute to the development and collapse of cyanoHABs. Therefore, to understand cyanoHABs, a modular microbial perspective may be more helpful than a single bacterial species perspective.
为了阐明蓝藻有害藻华（cyanoHABs）期间蓝藻与其他细菌（非蓝藻）之间的种间连通性，于2016年6月至2017年8月从韩国洛东江采集样本，并进行了微生物循环关联网络（MRAN）分析，以克服传统网络分析的局限性。藻华在夏季与……紧密相连，与非藻华期相比，非蓝藻群落组成（nCCC）发生了显著变化。河流细菌群落可明显分为参与cyanoHABs形成、维持和分解的模块。……和……分别与主要蓝藻直接相连，并分别被指定为cyanoHABs相关模块中的连接体和模块枢纽。cyanoHABs相关模块的功能概况表明，在藻华期，硝酸盐还原、好氧氨氧化、发酵和烃类降解可能会增加。总之，MRAN分析表明，属于cyanoHABs相关模块的特定细菌，包括连接体和模块枢纽，似乎对cyanoHABs的发展和衰退有贡献。因此，为了理解cyanoHABs，模块化微生物视角可能比单一细菌物种视角更有帮助。 （注：原文中部分内容缺失，已按原样翻译）
