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首页> 外文期刊>Harmful Algae >Recent Trends In Paralytic Shellfish Toxins In Puget Sound, Relationships To Climate, And Capacity For Prediction Of Toxic Events
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Recent Trends In Paralytic Shellfish Toxins In Puget Sound, Relationships To Climate, And Capacity For Prediction Of Toxic Events

机译：普吉特海湾麻痹性贝类毒素的最新趋势，与气候的关系以及有毒事件的预测能力

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Temporal and spatial trends in paralytic shellfish toxins (PSTs) in Puget Sound shellfish and their relationships with climate are investigated using long-term monitoring data since 1957. Data are selected for trend analyses based on the sensitivity of shellfish species to PSTs and their depuration rates, and the frequency of sample collection at individual sites. These criteria limit the analyses to the shellfish species Mytilus edulis at 20 sites from 1993 to 2007. Blue mussel toxicity is highly variable, but typically exceeds the regulatory limit for human consumption from July to November annually, with most closures occurring early in fall. Using blue mussel data only, we find no robust evidence to suggest that the frequency, magnitude, duration, or geographic scope of PST events in Puget Sound increased between 1993 and 2007. However, there is a significant basin-wide trend for closures to occur earlier in the year. There are no significant correlations between annual indices of mussel toxicity and aspects of the local and large-scale climate. Case studies of daily variations in local environmental factors leading up to exceptionally toxic events identify a combination of conditions that generally precedes most closures from 1993 to 2007. These results suggest that periods of warm air and water temperatures and low streamflow on sub-seasonal timescales may facilitate toxin accumulation in mussels. No relationships were found between water residence times in the surface layer and either streamflow or mussel toxicity. Recommendations are made for future monitoring to improve forecasting of PST risks in Puget Sound, an important region for recreational, commercial, and tribal subsistence shellfish harvesting.
机译：自1957年以来，使用长期监测数据研究了普吉特海湾贝类麻痹性贝类毒素（PST）的时空趋势及其与气候的关系。根据贝类对PSTs的敏感性及其净化率，选择数据进行趋势分析。 ，以及在各个地点收集样品的频率。这些标准限制了从1993年到2007年在20个地点的贝类物种Mytilus edulis的分析。蓝贻贝的毒性变化很大，但通常每年7月至11月超过人类食用的管理限制，大多数关闭发生在秋天初期。仅使用蓝贻贝数据，我们没有强有力的证据表明1993年至2007年之间普吉特海湾PST事件的发生频率，幅度，持续时间或地理范围有所增加。但是，在整个盆地范围内，发生封闭的趋势非常明显在今年早些时候。贻贝毒性的年度指数与当地和大规模气候方面之间没有显着相关性。对导致异常毒性事件的当地环境因素的每日变化进行的案例研究确定了从1993年至2007年大多数关闭之前普遍存在的各种条件。这些结果表明，在亚季节时间尺度上，温暖的空气和水温以及低流量是可能的。促进贻贝中毒素的积累。在水在表层的停留时间与水流或贻贝毒性之间未发现任何关系。针对未来的监测提出了建议，以改善对普吉特海湾（Puget Sound）的PST风险的预测，该地区是休闲，商业和部落生活贝类捕捞的重要区域。

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