Ocean warming since 1982 has expanded the niche of toxic algal blooms in the North Atlantic and North Pacific oceans
Ocean warming since 1982 has expanded the niche of toxic algal blooms in the North Atlantic and North Pacific oceans
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DOI：
10.1073/pnas.1619575114
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发表时间：
2017-05-09
影响因子：
11.1
通讯作者：
Litaker, R. Wayne
中科院分区：
文献类型：
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作者：
Gobler, Christopher J.;Doherty, Owen M.;Litaker, R. Wayne
全球海洋温度正在上升，但这种变化对有害藻华的影响尚未完全了解。在这里，我们使用高分辨率海面温度记录（1982年至2016年）和两种产生强效生物毒素的藻类（芬迪亚历山大藻和尖鳍藻）的温度依赖性生长率来评估这些有害生物的最新变化。对于这两个物种，潜在的平均年增长率和开花季节的持续时间显着增加，在许多沿海大西洋地区之间的40度和60度N，这些有害生物的事件已经出现，并在最近几十年扩大。在整个北太平洋，广泛的趋势不太明显，尽管在萨利希海和沿着阿拉斯加海岸线的地区最近出现了水华，而且这些赤潮事件的潜在增长率和持续时间都有显著增加。我们的结论是，海洋温度的上升是促进这些和其他可能的有害藻华加剧的一个重要因素，从而有助于扩大人类健康威胁。
Global ocean temperatures are rising, yet the impacts of such changes on harmful algal blooms (HABs) are not fully understood. Here we used high-resolution sea-surface temperature records (1982 to 2016) and temperature-dependent growth rates of two algae that produce potent biotoxins, Alexandrium fundyense and Dinophysis acuminata, to evaluate recent changes in these HABs. For both species, potential mean annual growth rates and duration of bloom seasons significantly increased within many coastal Atlantic regions between 40 degrees N and 60 degrees N, where incidents of these HABs have emerged and expanded in recent decades. Widespread trends were less evident across the North Pacific, although regions were identified across the Salish Sea and along the Alaskan coastline where blooms have recently emerged, and there have been significant increases in the potential growth rates and duration of these HAB events. We conclude that increasing ocean temperature is an important factor facilitating the intensification of these, and likely other, HABs and thus contributes to an expanding human health threat.