The aim of this study was to determine the amount of organic and inorganic carbon in foraminifera specimens and to provide quantitative data on the contribution of foraminifera to the sedimentary carbon pool in Adventfjorden. The investigation was based on three calcareous species that occur commonly in Svalbard fjords: Cassidulina reniforme, Elphidium excavatum and Nonionellina labradorica. Our results show that the species investigated did not contribute substantially to the organic carbon pool in Adventfjorden, because they represented only 0.37% of the organic carbon in the sediment. However, foraminiferal biomass could have been underestimated as it did not include arenaceous or monothalamous taxa. Foraminiferal carbonate constituted up to 38% of the inorganic carbon in the sediment, which supports the assumption that in fjords where non‐calcifying organisms dominate the benthic fauna foraminifera are among the major producers of calcium carbonate and that they play crucial roles in the carbon burial process. The results presented in this study contribute to estimations of changes in foraminiferal carbon levels in contemporary environments and could be an important reference for palaeoceanographic studies.

中文翻译：

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底栖有孔虫对峡湾现代碳库的贡献：斯匹次卑尔根Adventfjorden的季节性研究。

这项研究的目的是确定有孔虫标本中有机碳和无机碳的含量，并提供有孔虫对Adventfjorden沉积碳库的贡献的定量数据。调查基于斯瓦尔巴特群岛峡湾中常见的三种钙质物种：Cassidulina reniforme，Elphidium excavatum和Nonionellina labradorica。我们的结果表明，所研究的物种对Adventfjorden的有机碳库没有实质性贡献，因为它们仅代表沉积物中有机碳的0.37％。但是，有孔虫生物量可能被低估了，因为它不包括砂质或单孔类群。有孔虫碳酸盐占沉积物中无机碳的38％，这支持以下假设：在非钙化生物主导底栖动物有孔虫的峡湾中，碳酸钙的主要生产者之一，并且它们在埋葬碳中起关键作用过程。这项研究中提出的结果有助于估计当代环境中有孔虫碳水平的变化，并且可能是古海洋学研究的重要参考。