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海洋热浪调节食物网和碳运输过程
Mariana B Bif1,2, Colleen T E Kellogg3, Yibin Huang4
1Monterey Bay Aquarium Research Institute (MBARI), Moss Landing, CA, USA. marianabif@gmail.com.
Nature communications
|October 6, 2025
概括
海洋热浪 (MHWs) 增加了亚北极太平洋的微粒有机碳 (POC),通过丰富碎片和改变浮游生物. 这种碳积聚在半层区域中,减少了长期的碳捕集潜力.
科学领域:
- 海洋学 海洋学 海洋学
- 海洋生态海洋生态学
- 生物地质化学生物地质化学
背景情况:
- 海洋热浪 (MHWs) 显著影响海洋生态系统,但由于数据限制,它们对碳循环的影响尚未完全理解.
- 了解微粒有机碳 (POC) 动态对于评估海洋健康和碳捕获至关重要.
研究的目的:
- 调查MHWs对东北亚北极太平洋的POC生产,转化和运输的影响.
- 在MHW事件期间将物理和生物地球化学数据与浮游生物群落结构联系起来.
主要方法:
- 使用了十多年的自主生物地球化学 (BGC) -Argo浮动数据.
- 集成的BGC-Argo数据与水柱浮游生物群落概况.
- 在相关的海洋尺度上分析物理,化学和生物参数.
主要成果:
- 在2015年和2019年的MHW期间观察到POC度升高,与碎片丰富和浮游生物群落转移有关.
- 较小的颗粒 (<100微米) 积聚在半层水中,而不是快速出口.
- 积累的POC的缓慢重矿化减少了深层颗粒流和碳捕集潜力.
- 生态系统对MHW的反应显示出显著的年际变化,在2014年和2020年没有增强.
结论:
- 海洋海可以通过影响POC动态和减少海洋碳捕获能力来改变海洋碳循环.
- 持续的多平台观测对于准确评估和预测极端热事件对海洋碳循环的影响至关重要.
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