浮游生物微生物签名的沉没颗粒出口在开放的海洋的内部
Fuyan Li1,2, Andrew Burger1,2, John M Eppley1,2
1Department of Oceanography, University of Hawai'i at Mānoa, Honolulu, HI, USA.
Nature communications
|November 7, 2023
概括
沉没颗粒中的海洋微生物作为碳出口的标记物. 它们的丰度随着深度的变化而变化,揭示了微生物在深海碳捕获中的作用.
科学领域:
- 海洋生物学 海洋生物学
- 海洋学 海洋学 海洋学
- 生物地质化学生物地质化学
背景情况:
- 海洋光合作用通过引力将大量的有机颗粒碳 (POC) 输出到深海.
- 了解深海出口期间的POC转变对于气候模型至关重要.
- 微生物在粒子形成和沉降中的作用尚未完全理解.
研究的目的:
- 调查悬浮 prokaryotes 作为微粒有机碳 (POC) 出口的标记物的作用.
- 了解微生物在沉没颗粒中的携带和殖民过程.
- 为了确定微生物对POC出口的贡献的深度变化.
主要方法:
- 使用太平洋海洋学运动进行的三年时间序列研究.
- 悬浮 prokaryote 在沉没颗粒中的相对丰度的分析.
- 悬浮中的微生物群落与沉没的粒子之间的比较.
主要成果:
- 沉没颗粒中的悬浮 prokaryote 丰富度从 75 到 250m 指数级下降.
- 在250米以下,沉没粒子中的悬浮 prokaryote 丰富度随着深度的增加而增加.
- 微生物的携带,殖民和颗粒形成在中和水区域都很高.
结论:
- 悬浮 prokaryotes 是深海颗粒出口过程的有效标记物.
- 微生物活动显著影响POC出口和在更深处的封存.
- 微生物数据提供了POC出口动态的洞察力,超出了传统的生物地球化学测量.
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