转基因分析显示,在气候变暖下,有毒的伪尼茨基亚和增强的神经毒素产生的全球分布和增强的神经毒素产量
Dong Xu1,2, Zhuonan Wang3, Georgina L Brennan4
1State Key Laboratory of Mariculture Biobreeding and Sustainable Goods, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, Shandong, China.
Global change biology
|July 27, 2025
概括
产生神经毒素 domoic acid (DA) 的 Pseudo-nitzschia 等有害藻在全球范围内比以前所知的更为广泛. 预计气温上升将大大增加它们的数量和毒性,影响海鲜的安全性.
科学领域:
- 海洋生物学 海洋生物学
- 生态毒理学 生态毒理学
- 气候变化科学 气候变化科学
背景情况:
- 有害的藻 Pseudo-nitzschia 产生多米酸 (DA),这是一个强大的神经毒素.
- 人们对伪尼茨基亚和DA生产的全球分布和环境驱动因素知之甚少.
- 这种知识差距阻碍了在气候变化下对人类健康和海产品安全的影响的准确预测.
研究的目的:
- 调查关键有毒的伪尼茨基亚物种的全球分布.
- 确定环境驱动因素,特别是温度,影响伪尼茨基亚丰度和DA生产.
- 在气候变化情景下预测伪尼茨基亚流行率和毒性的未来变化.
主要方法:
- 利用了来自塔拉海洋的全球元组学数据.
- 来自中国海岸和南大洋的综合现场调查数据.
- 在SSP2-4.5气候场景下使用全球建模来预测未来的变化.
主要成果:
- 四种有毒的伪尼茨基亚物种 (P. multiseries,P. multistriata,P. delicatissima,P. pungens) 在全球范围内普遍存在,从沿海到公开海洋环境.
- 温度上升被确定为伪尼茨基亚空间分布,DA产生和代谢途径的关键驱动因素.
- 全球模型预测,在SSP2-4.5.5下,到2100年,P. multiseries的丰富度将增加约75%,其毒素产量将增加多达200%,在SSP2-4.5.5下.
结论:
- 这项研究显著扩大了主要的神经毒素产生藻的已知全球分布.
- 气温上升是推动伪尼茨基亚的流行率和毒性增加的关键因素.
- 预计未来的气候变化将加剧与伪尼茨基亚花和酸污染相关的风险.
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