莱州湾盐度变化现状及其对海洋环境与生态的影响

依据莱州湾生态监控区2004年5、8月份两个航次的盐度监测资料,结合近40a污染监测网莱州湾海域的监测资料和历年黄河入海径流量等有关资料,研究分析了近年莱州湾盐度变化状况及主要影响因素。研究发现近40 a莱州湾盐度变化趋势总体上呈上升态势,莱州湾盐度值与以前相比有明显升高。黄河径流量锐减和断流是引起莱州湾盐度升高的主要原因。莱州湾盐度升高,对莱州湾海洋生态环境的影响是多方面的,对湾内产卵场、育幼场和海洋生物群落结构都有一定的影响。

Status of salinity changes and the effect on marine environments and ecosystem in Laizhou Bay

According to the data of salinity from the ecological monitoring area of Laizhou Bay, and the two voyages in May and Aug. and combined the related data from pollution monitoring net in the last 40 years, the researches on the changes of salinity and the major contributing factors were made in Laizhou Bay in recent years. The results showed that the salinity in Laizhou Bay went up in recent 40 years and the runoff volumes and drought of Yellow River were the major reasons. The rise of salinity caused the many effects on the marine ecosystem, such as the breeding areas, nursery areas and marine biological community structure in Laizhou Bay, etc.