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Spatial and temporal trends in physiological biomarkers of adult eastern oysters, Crassostrea virgtnica, within an urban estuary

机译:在城市河口内成年东牡蛎,鲫鱼生理生物标志物的空间和时间趋势

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摘要

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.
机译:重金属污染和水质可能会改变高城市化的富营养人的生态系统的牡蛎的生殖能力。本研究评估了成人牡蛎,鲫鱼鲫鱼的生理生物标志物和重金属身体负担,放在高度城市和参考现场。条件指数和vitellogenin样蛋白在位点之间显着差异,但电子传输系统的蛋白质浓度和活性不是。在两个地点发生CD和HG的积累,城市网站的CD体重较大。城市遗址的条件指数和CD体重之间存在负面关系,而在参考现场的生理生物标志物和金属负担之间没有发现任何关系。结果表明,牡蛎状况和生殖潜力可能受到通常在城市,富营养的生态系统中发现的生物和非生物因子的负面影响。

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