Abstract:In July (summer) and October (autumn) 2007 and in January (winter) and April (spring) 2008, an investigation was made on the spatiotemporal distribution of virus in the surface seawater, overlying water and sediment in Xiangshan Bay. A cylindrical High-fidelity gravity sampler instead of conventional grab sampler was used for collecting samples, and principal component analysis and multivariate linear stepwise regression analysis were adopted to analyze the relationships between virus abundance and environmental parameters.Virus abundance during investigation ranged from 6.48×104 to 1.01×108 cells/mL, with a mean of 1.55×107 , 1.03×108, 1.13×108 cells/mL of the surface seawater, overlying water and sediment respectively. Significantly high values could be observed for virus abundance in autumn compared to other sampling time with the lowest value in winter. In vertical direction, the number of viruses in the overlying water and in the sediment was higher than that in the surface seawater; in horizontal direction, the number of viruses decreased from the top to the mouth of the bay with higher abundance near the breeding areas. A very high value of virus abundance was observed near Power Plant as well. Such spatial distribution of viruses in Xiangshan Bay demonstrated that anthropogenic coastal land pollution and maricultures pollution played the key roles. The dissolved oxygen, surface seawater temperature and Chl a were the main factors influencing the abundance marine virus in surface seawater. In contrast, the nutrients (N, P) and bacteria abundance were the main factors influencing virioplankton distribution in the overlying water; in addition, the virus abundance had significant positive relation with the bacteria abundance in the sediment (P <0.01).
王海丽, 杨季芳, 屠霄霞, 陈吉刚, 冯辉强. 象山港海洋病毒时空分布特征及其环境影响因素[J]. 中国环境科学, 2011, 31(5): 834-844.
WANG Hai-Li, YANG Ji-Fang, TU Xiao-Xia, CHEN Ji-Gang, FENG Hui-Qiang. Spatiotemporal distribution of marine viruses with related to environmental factors in the Xiangshan Bay.. CHINA ENVIRONMENTAL SCIENCECE, 2011, 31(5): 834-844.