国际最新气候变化研究:鲸鱼粪便可记录与变暖相关有毒藻华|麻豆一区二区99久久久久

  中新网北京7月10日电 (记者 孙自法)国际知名学术期刊《自然》最新发表一篇气候变化论文称,研究人员通过分析弓头鲸的粪便样本,发现食物链中藻华毒素增加与海洋温度升高的关联。

  这一研究发现建立在北极地区近20年数据的基础上,或有助于深入理解变暖的海洋如何导致藻类毒素浓度升高,进而影响当地社区的食品安全。

  该论文介绍,过去20年间,北极经历了海洋变暖和海冰损失,这改变了海洋的环境。这类改变可能为有害藻华提供了适宜生长条件,这些藻华产生的毒素对野生动物和人类可能造成不利影响。但关于北极地区这些有害毒素的暴露水平变化,相关数据还很有限。

  在本项研究中,论文第一作者兼通讯作者、美国国家海洋渔业局Kathi A. Lefebvre和同事及合作者一起,调查了波弗特海205头弓头鲸肠道样本,其数据收集超过19年,随后进行了详细的毒素定量分析,以评估北极食物网中藻类毒素的存在情况。

  他们发现,藻类毒素浓度与海洋温度变化明显相关,其他相关因素还有开放水域面积(即无冰水域大小)、风速以及大气压力。结果显示,较高的毒素水平与海洋变暖加剧、海冰覆盖减少有关。

  论文作者总结说,这项研究发现表明,有更多毒素进入食物链,影响海洋生物,并潜在地影响那些依赖海洋来源食物的人类。他们建议持续监测海洋生物中有毒藻华情况,以保护依赖这些食物来源的北极社区。(完)

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发布于:北京市