Sun Wei, Xia Chunyu, Xu Meiying, Guo Jun, Sun Guoping
Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of MicrobiologyGuangzhou, China.
School of Life Sciences, Longyan UniversityLongyan, China.
Front Microbiol. 2017 Aug 31;8:1644. doi: 10.3389/fmicb.2017.01644. eCollection 2017.
Water quality ranks the most vital criterion for rivers serving as drinking water sources, which periodically changes over seasons. Such fluctuation is believed associated with the state shifts of bacterial community within. To date, seasonality effects on bacterioplankton community patterns in large rivers serving as drinking water sources however, are still poorly understood. Here we investigated the intra-annual bacterial community structure in the Dongjiang River, a drinking water source of Hong Kong, using high-throughput pyrosequencing in concert with geochemical property measurements during dry, and wet seasons. Our results showed that , and were the dominant phyla of bacterioplankton communities, which varied in composition, and distribution from dry to wet seasons, and exhibited profound seasonal changes. , and seemed to be more associated with seasonality that the relative abundances of , and were significantly higher in the dry season than those in the wet season ( < 0.01), while the relative abundance of was about 10-fold higher in the wet season than in the dry season. Temperature and [Formula: see text]-N concentration represented key contributing factors to the observed seasonal variations. These findings help understand the roles of various bacterioplankton and their interactions with the biogeochemical processes in the river ecosystem.
水质是作为饮用水源的河流最重要的标准，其会随季节周期性变化。这种波动被认为与内部细菌群落的状态转变有关。然而，迄今为止，季节性对作为饮用水源的大型河流中浮游细菌群落模式的影响仍知之甚少。在此，我们利用高通量焦磷酸测序技术并结合旱季和雨季的地球化学性质测量，研究了香港饮用水源东江的年内细菌群落结构。我们的结果表明， 、 和 是浮游细菌群落的优势门类，它们在组成和分布上从旱季到雨季有所不同，并呈现出深刻的季节性变化。 、 和 似乎与季节性关联更大，因为 、 和 的相对丰度在旱季显著高于雨季（ < 0.01），而 的相对丰度在雨季比旱季高约10倍。温度和 -N浓度是观察到的季节性变化的关键影响因素。这些发现有助于理解各种浮游细菌的作用及其与河流生态系统中生物地球化学过程的相互作用。
