植物浮游生物在构建全球海洋溶解有机碳池中的作用
Zhe Lu1,2, Guoming Qin1,2, Lingling Zheng3
1Guangdong Provincial Key Laboratory of Applied Botany, Xiaoliang Research Station for Tropical Coastal Ecosystems, and Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, P. R. China.
Nature communications
|August 20, 2025
概括
植物浮游生物的开花会释放出大量的反弹性溶解有机碳 (DOC) 进入海洋. 考虑到浮游植物类型和季节,可以改进预测海洋DOC度的模型.
科学领域:
- 海洋学 海洋学 海洋学
- 生物地质化学生物地质化学
- 海洋生态海洋生态学
背景情况:
- 植物浮游生物是海洋碳循环的关键参与者,将大气中的二氧化碳转移到海洋溶解有机碳 (DOC) 储库中.
- 当前的模型往往忽略了植物源DOC的分子和季节性变化.
研究的目的:
- 描述不同植物浮游生物种群中DOC的分子特征.
- 通过整合植物浮游生物特定数据,开发改进的模型来预测表面的DOC度.
- 评估浮游植物成分和季节性对海洋DOC动态的全球影响.
主要方法:
- 使用超高分辨率质谱法 (FT-ICR MS) 来分析DOC分子组成.
- 综合的FT-ICR MS数据与卫星衍生,分类解析的叶绿素-a度.
- 开发并验证了机器学习模型,以预测表面的DOC度.
主要成果:
- 在所有研究的藻类群体中,固的DOC占有机碳总量的10%以上.
- 结合特定分类的碳分配的机器学习模型显著优于没有 (R2=0.92/0.80对比0.69/0.46) 的模型.
- 发现,全球表面DOC变异的多达63.8%的原因是藻.
- 在全球范围内,藻类反的DOC产量在生长阶段高于下降阶段.
结论:
- 来自浮游生物的反复性DOC是海洋DOC的实质性和广泛的组成部分.
- 整合植物浮游生物的分类学和季节性数据对于准确的DOC建模至关重要.
- 植物浮游生物花的持续时间和组成显著影响全球海洋DOC动态和长期碳储存.
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