Anthropogenic pollution including metals, petroleum, toxins, nutrients and many others is a growing problem in the marine environment. These are important factors altering the environment and by that the fate of many local populations of marine organisms. The aim of this study was to assess the impact of selected point pollution sources on resident populations of the blue mussel (Mytilus edulis trossulus) in the Baltic Sea using multiple biomarker approach. The study used a nested sampling scheme in which sites from reference (REF) habitats are geographically paired with selected sites from sewage treatment plants (STP) and harbors (HAR). The results showed that mussels from harbors had a higher frequency of histological abnormalities in the digestive gland compared to mussels from sewage effluent affected areas and reference sites. However these mussels together with mussels from STPs had higher lipid content, body mass index (BMI) and gonado-somatic index (GSI) compared to mussels from reference sites. A marked spatial variability was found with a stronger toxicity of ambient environment affecting resident mussel populations in the Gulf of Gdańsk area, while an opposite pattern was found in Tvärminne area. Yet the blue mussels sampled in the Gulf of Gdańsk were characterized by the highest GSI and BMI values compared to Askö and Tvärminne populations. No differences in analyzed biomarker response related to species identity, measured by a species-specific genetic marker, were found indicative of strong genetic introgression in the Baltic Proper.

人为污染，包括金属，石油，毒素，营养物质和许多其他问题，是海洋环境中日益严重的问题。这些是改变环境的重要因素，并因此改变了许多当地海洋生物种群的命运。这项研究的目的是评估选定点污染源对蓝贻贝（Mytilus edulis trossulus）常住人口的影响。）在波罗的海使用多种生物标记方法。该研究采用嵌套抽样方案，其中参考（REF）栖息地的地点与污水处理厂（STP）和港口（HAR）的选定地点在地理上配对。结果表明，与来自污水排放影响区和参考点的贻贝相比，来自港口的贻贝在消化腺中的组织学异常发生频率更高。但是，这些贻贝与来自STP的贻贝相比，来自参考地点的贻贝具有更高的脂质含量，体重指数（BMI）和性腺体细胞指数（GSI）。发现明显的空间变异性，其周围环境的毒性更强，影响格但斯克海湾地区的贻贝种群，而特维尔明讷地区则发现相反的格局。然而，与格斯克和特维尔明种群相比，格但斯克海湾的蓝贻贝具有最高的GSI和BMI值。未发现通过物种特异性遗传标记测得的与物种身份相关的已分析生物标记反应中的差异，表明在波罗的海适当地区有强烈的基因渗入。