Mortality of sea lions along the central California coast linked to a toxic diatom bloom
Mortality of sea lions along the central California coast linked to a toxic diatom bloom
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DOI：
10.1038/47481
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发表时间：
2000-01-06
期刊：
影响因子：
64.8
通讯作者：
Van Dolah, FM
中科院分区：
文献类型：
--
作者：
Scholin, CA;Gulland, F;Van Dolah, FM
在1998年5月和6月期间，超过400只加利福尼亚海狮（Zalophus California）死亡，许多其他海狮在加利福尼亚中部海岸表现出神经功能障碍的迹象。在同一时期，蒙特利湾地区还发现了南方假硅藻（pseudonitzschia australis）的爆发。这种藻华与软骨藻酸（DA）的产生有关，这是一种神经毒素(1)，在浮游鱼类中也被检测到，包括北凤尾鱼（Engraulis mordax），以及海狮的体液。这些和其他同时进行的观察表明，DA的营养转移导致海洋哺乳动物死亡。与鱼类相比，在DA爆发期间收集的蓝贻贝（Mytilus edulus）不含DA或仅含有微量DA。这些发现表明，仅对贻贝毒性进行监测并不一定能提供足够的警告，警告DA进入食物网的水平足以危害海洋野生动物，甚至可能危害人类。
Over 400 California sea lions (Zalophus californianus) died and many others displayed signs of neurological dysfunction along the central California coast during May and June 1998. A bloom of Pseudo-nitzschia australis (diatom) was observed in the Monterey Bay region during the same period. This bloom was associated with production of domoic acid (DA), a neurotoxin(1) that was also detected in planktivorous fish, including the northern anchovy (Engraulis mordax), and in sea lion body fluids. These and other concurrent observations demonstrate the trophic transfer of DA resulting in marine mammal mortality. In contrast to fish, blue mussels (Mytilus edulus) collected during the DA outbreak contained no DA or only trace amounts. Such findings reveal that monitoring of mussel toxicity alone does not necessarily provide adequate warning of DA entering the food web at levels sufficient to harm marine wildlife and perhaps humans.