Limited sinking of Phaeocystis during a 12 days sediment trap study

Limited sinking of Phaeocystis during a 12 days sediment trap study
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在为期 12 天的沉积物捕集器研究中,棕囊藻的下沉有限

DOI:
10.1111/mec.13697
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发表时间:
2016
期刊:
影响因子:
4.9
通讯作者:
Katja Metfies
Katja Metfies
中科院分区:
生物学1区
文献类型:
--
作者:
C. Wolf;M. Iversen;C. Klaas;Katja Metfies

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关于棕囊藻属在碳垂直输出中的作用,目前存在着支持和反对棕囊藻属沉积的争论。到目前为止,沉物中的棕囊藻的存在进行了调查的方法取决于形态特征(显微镜)和快速降解物质(生化分析)。在这项研究中,我们用454焦磷酸测序和显微镜计数确定了南大洋大西洋部分12天内短期沉积物陷阱和上覆水柱中的南极棕囊藻的发生和丰度。在沉积物捕获器样品中,我们只发现了几个属于棕囊藻的序列,这并不能反映上述水体中的情况。细胞计数显示相同的结果。我们的结论是,棕囊藻细胞一般不向下运输的主动下沉或其他下沉过程。
There is a controversy discussion about the contribution of the genus Phaeocystis to the vertical carbon export with evidence for and against sedimentation of Phaeocystis. So far, the presence of Phaeocystis in sinking matter was investigated with methods depending on morphological features (microscopy) and fast degradable substances (biochemical analyses). In this study, we determine the occurrence and abundance of Phaeocystis antarctica in short‐term sediment traps and the overlying water column during a 12‐day time period in the Atlantic sector of the Southern Ocean with 454‐pyrosequencing and microscopy counting. In the sediment trap samples, we only found few sequences belonging to Phaeocystis, which was not reflecting the situation in the water column above. The cell counts showed the same results. We conclude that Phaeocystis cells are not generally transported downwards by active sinking or other sinking processes.
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