浮游生物网络在寡量海洋中推动碳出口
Lionel Guidi1,2, Samuel Chaffron3,4,5, Lucie Bittner6,7,8
1Sorbonne Universités, UPMC Université Paris 06, CNRS, Laboratoire d'oceanographie de Villefranche (LOV), Observatoire Océanologique, Villefranche-sur-Mer, France.
Nature
|February 11, 2016
概括
生物碳在深海中封存碳. 特定的浮游生物群落和微生物基因与缺乏营养的水域的碳出口相关, 揭示了这一过程的关键驱动因素.
科学领域:
- 海洋生物学
- 海洋学
- 生物地质化学
背景情况:
- 生物碳 (BCP) 将大气中的二氧化碳转化为有机碳,并将其输送到深海.
- 浮游生物群的组成影响了BCP的强度,但驱动这一过程的特定生态系统结构尚不清楚.
研究的目的:
- 研究浮游生物群体结构与寡量海洋碳出口之间的关系.
- 确定与碳出口相关的关键类型和微生物基因.
主要方法:
- 使用来自塔拉海洋探险的环境和基因组数据.
- 从表面和深层叶绿素最大层分析了浮游生物群落.
- 相关的社区组成和基因丰富性与碳出口在150m.
主要成果:
- 特定的浮游生物群落,包括放射菌,状寄生虫,Synechococcus及其菌体,与碳出口密切相关.
- 某些细菌和病毒基因的相对丰富性显著地预测了寡质地区的碳出口变异性.
结论:
- 浮游生物群体的组成和特定的微生物基因是寡质海洋碳出口效率的关键决定因素.
- 意想不到的种类在生物碳中起着重要作用.
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