In recent years, blooms of the neurotoxic dinoflagellate Alexandrium catenella have been documented in Pacific Arctic waters, and the paralytic shellfish toxins (PSTs) that this species produces have been detected throughout the food web. These observations have raised significant concerns about the role that harmful algal blooms (HABs) will play in a rapidly changing Arctic. During a research cruise in summer 2022, a massive bloom of A. catenella was detected in real time as it was advected through the Bering Strait region. The bloom was exceptional in both spatial scale and density, extending > 600 km latitudinally, reaching concentrations > 174,000 cells L−1, and producing high‐potency PST congeners. Throughout the event, coastal stakeholders in the region were engaged and a multi‐faceted community response was mobilized. This unprecedented bloom highlighted the urgent need for response capabilities to ensure safe utilization of critical marine resources in a region that has little experience with HABs.

中文翻译：

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追踪大规模且剧毒的北极藻华：快速检测和风险沟通


近年来，在太平洋北极水域中记录了具有神经毒性的链状亚历山大藻的大量繁殖，并且在整个食物网中都检测到了该物种产生的麻痹性贝类毒素（PST）。这些观察结果引起了人们对有害藻华（HAB）在快速变化的北极中所扮演的角色的严重担忧。在 2022 年夏季的一次研究航行中，在平流通过白令海峡地区时，实时检测到了链状藻的大量繁殖。该水华在空间规模和密度上都非常出色，纬度延伸超过 600 公里，浓度达到 > 174,000 个细胞 L−1，并产生高效的 PST 同系物。在整个活动过程中，该地区的沿海利益相关者都参与其中，并动员了多方位的社区响应。这种前所未有的爆发凸显了对响应能力的迫切需求，以确保在一个缺乏HAB经验的地区安全利用关键海洋资源。