Marine Environmental Research ( IF 3.3 ) Pub Date : 2020-08-20 , DOI: 10.1016/j.marenvres.2020.105122 Allison M Fitzgerald 1 , William G Wallace 2 , Chester B Zarnoch 3
Heavy metal contamination and water quality may alter reproductive capacity of oysters in highly urbanized, eutrophic ecosystems. This study assessed physiological biomarkers and heavy metal body burdens in adult oysters, Crassostrea virginica, placed at a highly urban and reference site. Condition index and Vitellogenin-like proteins were significantly different between sites, but protein concentration and activity of the electron transport system were not. Accumulation of Cd and Hg occurred at both sites, and Cd body burden was greater at the urban site. There was a negative relationship between condition index and Cd body burden at the urban site, while no relationship was found between physiological biomarkers and metal burden at the reference site. The results suggest that oyster condition and reproductive potential may be negatively influenced by the biotic and abiotic factors typically found within urban, eutrophic ecosystems.
中文翻译:
城市河口内成年东部牡蛎(Crassostrea virginica)的生理生物标志物的时空趋势。
重金属污染和水质可能会改变高度城市化的富营养化生态系统中牡蛎的繁殖能力。这项研究评估了成年牡蛎Crassostrea virginica的生理生物标志物和重金属的身体负担,放置在城市和参考地点。各部位之间的状况指数和卵黄蛋白原样蛋白差异显着,但蛋白浓度和电子传输系统的活性没有差异。在这两个地点都发生了镉和汞的积累,而城市地点的镉身体负担更大。在市区,条件指标与镉的身体负荷之间存在负相关关系,而在参考地点,生理生物标志物与金属负荷之间没有相关关系。结果表明,牡蛎的状况和繁殖潜力可能受到城市富营养化生态系统中通常存在的生物和非生物因素的负面影响。