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海洋热浪对生态系统运作的巨大潜在影响
Vianney Guibourd de Luzinais1,2, Didier Gascuel1, Gabriel Reygondeau3
1UMR Dynamics and Sustainability of Ecosystems: From Source to Sea (DECOD), Institut Agro, Ifremer, INRAE, Rennes, France.
Global change biology
|July 26, 2024
概括
海洋热浪 (MHWs) 显著减少了消费者生物质,而更高的热量水平则进一步下降. 恢复时间因生物群而异,突出显示了极端事件对海洋生态系统的影响.
科学领域:
- 海洋生态海洋生态学
- 气候变化生物学 气候变化生物学
- 生态系统建模 生态系统建模
背景情况:
- 海洋变暖正在改变海洋生态系统,影响物种分布,现象学和食物网动态.
- 海洋热浪 (MHWs) 的频率和强度正在增加,造成广泛的生态损害,如珊瑚漂白和库存减少.
研究的目的:
- 通过使用动态热流动力学模型,研究 MHW 对海洋生态系统运作的级联影响.
- 探索不同的MHW强度和物种死亡率假设如何影响食物网.
主要方法:
- 开发和应用一个动态的EcoTroph trofhodynamic建模方法.
- 在不同的MHW场景和死亡率下模拟理论生态系统.
- 分析生物质变化在热带层和生物群之间的变化.
主要成果:
- MHWs在消费者中造成显著的生物质减少,对更高的热量水平产生更大的影响.
- 生态系统结构因热带层间差异性生物量下降而发生变化.
- 热带生态系统对低强度的MHW敏感,而极地和温带生态系统需要更强烈的事件来产生重大影响.
结论:
- 人类海对海洋生态系统的影响是巨大的,并因食量级和生物群而异.
- 与热带地区相比,极地和温带地区的MHW恢复时间较长.
- 极端天气事件必须纳入对海洋生态系统健康的气候变化评估.
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