Shuai You, Li Xing, Mary Lesperance, Youlian Pan, Xuekui Zhang
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引用次数: 0
摘要
贝类中毒在全球范围内对人类健康构成了严重威胁。加拿大贝类卫生计划成立于 1948 年,目的是监测加拿大六省沿海贝类捕捞地点的毒素水平。多羧酸是导致失忆性贝类中毒的一种毒素,本研究对加拿大沿海多羧酸的时空变化进行了宏观分析。我们将蓝贻贝(Mytilus edulis)和软壳蛤(Mya arenaria)样本中的毒素水平按周汇总,时间跨度为一年。随后应用功能主成分分析揭示了季节性变化的幅度和初夏、春季或秋季中期的 DA 水平峰值构成了不列颠哥伦比亚省和爱德华王子岛沿岸蓝贻贝以及新不伦瑞克省和新斯科舍省沿岸软壳蛤毒素水平的最大变化。在魁北克省,DA 含量较低,从春季到秋季的总体水平差异较大。不列颠哥伦比亚省的下游相关性分析进一步发现,在大多数地点,降水和无机营养物质(包括硝酸盐、亚硝酸盐、磷酸盐和硅酸盐)与几周后的DA之间呈负相关。这些发现表明,失忆性贝类中毒与环境压力之间存在关联。
Temporal and spatial variation of domoic acid along Canada's coast.
Shellfish poisonings have posed severe risks to human health globally. The Canadian Shellfish Sanitation Program was established in 1948 to monitor the toxin levels at shellfish harvesting sites along the coast of six provinces in Canada. Domoic acid has been a causal toxin for amnesic shellfish poisoning, and a macro-scale analysis of the temporal and spatial variation of domoic acid along Canada's coast was conducted in this study. We aggregated the toxin levels by week in blue mussel (Mytilus edulis) and soft-shell clam (Mya arenaria) samples, respectively, over a one-year scale. The subsequent application of Functional Principal Component Analysis unveiled that magnitudes of seasonal variation and peaked DA levels around early summer, spring, or mid-fall formed the largest variation in the toxin levels in blue mussels along the coastlines of British Columbia and Prince Edward Island and in soft-shell calms along those of New Brunswick and Nova Scotia. In Quebec, the DA levels were low and varied mostly in terms of the overall magnitude from spring to fall. Downstream correlation analyses in British Columbia further discovered that, at most sites, the strongest correlations were negative between precipitation as well as inorganic nutrients (including nitrate, nitrite, phosphate, and silicate) on one side and DA a few weeks afterward on the other. These findings indicated associations between amnesic shellfish poisoning and environmental stresses.
期刊介绍:
The Science of the Total Environment is an international journal dedicated to scientific research on the environment and its interaction with humanity. It covers a wide range of disciplines and seeks to publish innovative, hypothesis-driven, and impactful research that explores the entire environment, including the atmosphere, lithosphere, hydrosphere, biosphere, and anthroposphere.
The journal's updated Aims & Scope emphasizes the importance of interdisciplinary environmental research with broad impact. Priority is given to studies that advance fundamental understanding and explore the interconnectedness of multiple environmental spheres. Field studies are preferred, while laboratory experiments must demonstrate significant methodological advancements or mechanistic insights with direct relevance to the environment.