异质性生产在寡质性海洋水中的流动
Afrah Alothman1,2, Carlos M Duarte1, Mohammed Ali Qurban2
1Marine Science Program, Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia.
Frontiers in microbiology
|March 27, 2025
概括
细菌生产是红海碳转移的关键途径,放牧显著促进细菌生长和碳流向更高的热带水平,特别是在更温暖的水域.
科学领域:
- 海洋微生物生态学
- 生物地质化学循环过程
- 食物网的动态 食物网的动态
背景情况:
- 细菌生产 (BP) 对于寡质生态系统中的碳转移 (CT) 是至关重要的.
- 从细菌到海洋食物网的CT量化仍然具有挑战性.
- 微生物循环在营养循环和能量转移中起着至关重要的作用.
研究的目的:
- 为了量化红海微生物循环中的碳转移.
- 评估放牧对细菌生产和碳循环的影响.
- 为了研究温度对细菌碳转移的影响.
主要方法:
- 使用了13C-同位素标记器和腔环降光谱.
- 测量初级生产 (PP),细菌生产 (BP),细菌呼吸 (BR) 和碳转移 (CT).
- 采用预过技术来评估放牧者的作用.
主要成果:
- 细菌生产率明显低于总初级生产.
- 移除牧场导致BP增加9.5倍,这表明牧场压力很大.
- 碳转移到更大尺寸的微小部分 (>1.2或>3微米) 平均占细菌净产量的72.7%.
- 随着气温的上升,碳转移增加,突出显示微生物循环在更温暖的条件下发挥的作用.
- 观察到高细菌呼吸率和低细菌生长效率 (BGE).
结论:
- 细菌生产有效地将碳转移到红海的寡质和温暖水域的更高的热量级.
- 放牧是推动红海微生物食物网内的碳转移的关键过程.
- 温度显著影响碳循环中的微生物循环的效率.
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