藻类与各种未培养的掠食性前列腺一起消耗了丰富的开放海洋蓝藻 prochlorococcus
Susanne Wilken1,2,3, Charmaine C M Yung4, Camille Poirier4
1Department of Ocean Sciences, University of California Santa Cruz, Santa Cruz, CA 95064.
概括
藻类和其他原生体是Prochlorococcus的主要捕食者,这是一个重要的海洋蓝藻细菌. 这项研究揭示了以前被忽视的海洋食物网关键联系和碳转移途径.
科学领域:
- 海洋微生物生态学
- 海洋学 海洋学 海洋学
- 食物网的动态 食物网的动态
背景情况:
- 普罗克洛科克 (Prochlorococcus) 是一种全球丰富的海洋蓝藻细菌,是初级生产的核心.
- 了解Prochlorococcus捕食对海洋食物网动态至关重要,但捕食者识别仍然有限.
- 之前的研究往往忽略了Prochlorococcus在大规模调查中的关键放牧者.
研究的目的:
- 在一系列海洋条件下识别Prochlorococcus的主要捕食者.
- 阐明特定原生态系在Prochlorococcus食物网中的作用.
- 为了解决从Prochlorococcus转移到更高的食物营养水平的碳转移途径.
主要方法:
- 通过使用标记的Prochlorococcus猎物进行RNA稳定同位素探测 (SIP) 实验.
- 在Prochlorococcus丰富度梯度 (加利福尼亚沿海到北太平洋旋转) 的实地社区分析.
- 将SIP结果与传统的18S rRNA基因片调查数据进行比较.
主要成果:
- 查诺鞭状体被确定为Prochlorococcus最活跃的捕食者.
- 其他重要的捕食者包括放射性虫,虫,虫和特定的MAST血统.
- 传统的18S rRNA基因调查低估了这些关键的Prochlorococcus捕食者的丰富性和活性.
结论:
- 藻类和其他已识别的原生体在消耗Prochlorococcus生物质方面发挥着关键作用.
- 这项研究解决了从初级生产者那里直接的食品网络联系和碳转移路径.
- 准确识别放牧动物对于了解海洋微生物食物网的结构和功能至关重要.
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