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互动问题:自下而上的驱动因素相互依赖性改变了植物浮游生物群落对气候变化的预期反应

Miriam Seifert¹, Cara Nissen¹, Björn Rost^1,2

¹Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Bremerhaven, Germany.

Global change biology

|June 2, 2023

概括

气候变化影响植物浮游生物的生长. 将二氧化碳,温度和光线的交互效应纳入模型,揭示了特定群体的生物质变化,改变了未来的海洋社区组成和生物地化学流.

科学领域:

海洋生物地质化学海洋生物地质化学
气候变化对海洋生态系统的影响
植物浮游生物生态学

背景情况:

植物浮游生物的生长受到多种环境因素的影响,所有这些因素都受到气候变化的影响.
当前的海洋生物地球化学模型经常简化这些相互作用,使用单驱动器反应.
实验研究强调了 CO2,温度和光等驱动因素之间的复杂互动效应.

研究的目的:

改进植物浮游生物生长反应对相互作用的环境驱动因素在全球海洋生物地球化学模型中的表现.
评估结合双驱动相互作用 (CO2温度,CO2光) 对预计植物浮游生物质和社区结构的影响.
在气候变化情景下,为海洋初级生产商提供更现实的未来预测.

主要方法:

修改了一个生物地球化学模型,其中包含双驱动相互作用 (CO2和温度,CO2和光) 的植物浮游生物生长功能.
利用多驱动器实验室实验的元分析数据进行模型参数化.
模拟当前和未来的高排放 (SSP5-8.5) 气候,迫使我们测试模型的响应.

主要成果:

总的全球植物浮游生物质减少与没有相互作用效应相似 (5%-6%).
互动效应导致了特定群体的生物质变化:藻减少了更多,而小型浮游生物减少了更少.
可可利多生物质的反应逆转,显示了相互作用的增加 (+33.2%) 与没有相互作用的减少 (-10.8%).
南大洋在社区组成上显示出最显著的区域差异,藻减少而不是增加.

结论:

环境驱动因素的互动效应显著改变了浮游植物群落结构和生物质预测.
考虑到这些相互作用对于准确预测未来的海洋生物地球化学和生态系统功能至关重要.
这种方法将实验力学理解集成到全球模型中,增强预测能力.

关键词:

生物地质化学建模这种自下而上的效应是自下而上的效应.科利托光体 (coccolithophores) 是一种科利托光体.藻类是一种藻类.互动效应互动效应互动效应多个驱动程序的驱动程序.海洋酸化是指海洋的酸化.气候变暖导致的变暖

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