黄海春季海洋病毒的空间分布特征

Spatial distribution of viruses in spring in the Yellow Sea

采用荧光显微技术,报道了春季(2006年4月)海洋病毒丰度在黄海的空间分布,分析了病毒丰度与细菌丰度、叶绿素a浓度、温度和盐度的相关关系。研究结果表明,黄海表层水中病毒丰度的变化范围为1.08×107～9.90×107个/mL,平均值是5.62×107个/mL±2.28×107个/mL,细菌丰度的变化范围为0.01×107～0.16×107个/mL,平均值是0.07×107个/mL±0.03×107个/mL,病毒丰度大于细菌丰度两个数量级。叶绿素a浓度表层的变化范围为0.09～4.94μg/L,平均值是0.75μg/L±0.84μg/L,最高值出现在长江口附近。通过相关性分析,在黄海春季,细菌可能控制着病毒的空间分布,并且病毒的空间分布受盐度影响较小,受温度影响较大。

The spatial distribution of viral and bacterial abundance as well as chlorophyll a（chl a） concentrations were investigated during spring（April 2006） in the Yellow Sea.The viral abundance varied from 1.08×107 /mL to 9.90×107 /mL with the average of 5.62×107 /mL±2.28×107 /mL in spring,exceeding bacterial abundance（from 0.01×107 /mL to 0.16×107 /mL with the average of 0.07×107 /mL±0.03×107 /mL） by two order of magnitude.The chlorophyll a concentrations varied from 0.09μg/L to 4.94μg/L with the average of 0.75μg/L±0.84μg/L,and the highest concentration occurred near the Changjiang River estuary.A multiple regression analysis showed that the bacteria and temperature were the main factors governing the viral spatial distribution in the Yellow Sea.