Feng, J.-B.; Ren, C.-H.; Luo, P.; Yan, Y.; Jiang, X., and Hu, C.-Q., 2018. The response of bacterial community structure to ecological environment changes in Daya Bay between winter and spring. In: Wang, D. and Guido-Aldana, P.A. (eds.), Select Proceedings from the 3rd International Conference on Water Resource and Environment (WRE2017). Journal of Coastal Research, Special Issue No. 84, pp. 19–29. Coconut Creek (Florida), ISSN 0749-0208.
The distribution patterns of the bacterial biomass and its diversity were investigated in Daya Bay in winter and spring 2008. Based on the acridine orange direct count, the mean bacterial biomass (0.31±0.20 μg L−1) in spring was 1.5 times more than that (0.21±0.07 μg L−1) in winter. Spatially it showed the trend that the mean bacterial biomass at station surface and bottom layers in the south of the bay was higher than in the north of the bay. The results based on PCR-DGGE and DNA sequence analysis showed that the Proteobacteria group dominated in bacterial communities of Daya Bay and other groups included the Cyanobacteria, Actinobacteria and Verrucomicrobia. The mean bacterial apparent species richness (No. of DGGE bands) was distinctly higher in winter (18) than in spring (12). It was concluded that phytoplankton controlled bacterioplankton biomass by utilizing dissolved inorganic nitrogen (DIN) in winter and spring. The observed seasonal variations of bacterioplankton community composition in Daya Bay was mainly associated with the high-in-winter-and-low-in-spring availability of nutrients like DIN and SiO32−-Si.
