Ciguatera (fish poisoning), El Nino, and Pacific sea surface temperatures
Ciguatera (fish poisoning), El Nino, and Pacific sea surface temperatures
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DOI：
10.1046/j.1526-0992.1999.09903.x
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发表时间：
1999-03-01
期刊：
影响因子：
--
通讯作者：
Woodward, A
中科院分区：
文献类型：
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作者：
Hales, S;Weinstein, P;Woodward, A
雪卡毒（鱼类中毒）是人类因摄入海洋毒素而患病的最常见原因。这些毒素被以海藻为食的草食性鱼类摄入，然后通过食物链传递给食用珊瑚鱼的人类。我们使用了一个独特的数据库，在南太平洋岛屿报告的鱼中毒案件调查鱼中毒和厄尔尼诺南方涛动之间的关系，周期性的全球气候的破坏，与降雨量，温度和洋流的显着变化。这提供了一个机会，研究强气候信号对一个敏感生态系统的影响，该区域比大多数其他区域更少受到当地人类干扰。使用混合生态研究设计，我们计算了在个别太平洋岛屿的鱼中毒，估计当地海表温度，和南方涛动指数的报告之间的相关性。在厄尔尼诺现象期间经历变暖的一组岛屿中，发现鱼类中毒的年度发病率与当地海面变暖之间存在强正相关。在另一组岛屿，在厄尔尼诺现象期间，海洋表面冷却，鱼中毒与当地海洋表面温度之间的负相关性较弱。研究结果与其他证据一致，表明海洋生态系统和气候之间存在密切的相互依赖关系。如果温室效应增强导致气候继续变暖，雪卡毒可能会增加。近年来，珊瑚礁受到来自人口的越来越大的压力;雪卡毒素可能是热带海洋生态系统环境扰动的一个敏感指标。
Ciguatera (fish poisoning) is the most frequent cause of human illness caused by ingestion of marine toxins. The toxins are ingested by herbivorous fish which feed on marine algae and are then passed up the food chain to humans eating reef fish. We have used a unique database of reported fish poisoning cases in the South Pacific islands to investigate the relationship between fish poisoning and El Nino Southern Oscillation, a periodic disruption of global climate that is associated with marked changes in rainfall, temperatures, and ocean currents. This provides an opportunity to study the effects of a strong climate signal on a sensitive ecosystem in a region that has been less subject to local human disturbance than most others. Using a mixed ecological study design, we calculated correlations between reports of fish poisoning in individual Pacific Islands, estimates of local sea surface temperature, and the Southern Oscillation Index. Strong positive correlations between the annual incidence of fish poisoning and local warming of the sea surface were found in a group of islands which experience warming during EI Nino conditions. In another group of islands, which experience cooling of the sea surface during El Nino events, there were weaker negative correlations between fish poisoning and local sea surface temperature. The results are consistent with other evidence suggesting a close interdependence of marine ecosystems and climate. Increases in ciguatera may result if the climate continues to warm as a result of the enhanced greenhouse effect. Coral reefs have been under increasing pressure from human populations in recent years; ciguatera may be a sensitive indicator of environmental disturbance in tropical marine ecosystems.