大连市长海县虾夷扇贝养殖海区浮游病毒的丰度

摘要

2008年7月-2009年6月,利用荧光显微技术(EFM),对大连市长海县大长山岛和广鹿岛两个虾夷扇贝养殖海区的浮游病毒丰度进行调查,研究了浮游病毒丰度在虾夷扇贝养殖海区内水平分布、垂直分布和季节变化特征.结果表明,在水平分布上,养殖筏区内站位(Cl、G1、C2、G2、C3、G3)表层、10m层和底层的浮游病毒丰度表现为近岸水域高于远岸水域(P<0.05):在垂直分布上,站位(C2、G2、C3、G3、C4、G4)浮游病毒丰度高于10m水层和底层(P<0.05),10m和底层差别不大,离岸最近站位(CI、GI)浮游病毒丰度没有垂直分布的变化.在季节变化上,春夏两季的浮游病毒丰度高于秋冬的浮游病毒丰度,而夏季的浮游病毒丰度最高.利用多元相关分析可知,两个海岛的虾夷扇贝养殖海区浮游病毒丰度与叶绿素a(Chl.a)呈显著正相关(P<0.01),与水温呈正相关(P<0.05),与盐度、溶氧浓度之间没有相关性(P>0.05).%To study the distribution and variation of virioplankton in the sea of raft culture of Pationopecten yessoensis in the Guanglu Island and the Da Changshan, virioplankton abundance was determined by epifluorescence microscopy ( EFM). At the horizontal scale, virioplankton abundance in inshore waters including the surf ace, 10 m and bottom layers were higher than those in offshore waters (P ＜0. 05) ; At the vertical scale, virioplankton abundance of the surface was higher than that of 10 m layer and bottom layer (P ＜0.05)in the offshore waters. There was no difference between 10 m layer and bottom layer, and there was no vertical difference in the inshore waters between surface and bottom layer. As for the seasonal changes, virioplankton abundance of spring and summer were higher than those of autumn and winter. The virioplankton abundance of summer was highest. According to multi-correlation analysis, virioplankton abundance was distinct positive correlated with the Chl. A ( P ＜ 0. 01) and positive correlated with the temperature(P＜0. 05). Virioplankton abundance had no significant correlation with salinity and DO(P＞ 0.05).