The present study investigated the relationship of sediment attributes to meiofaunal composition pattern and its food source in the Kongsfjord. Sediment in the fjord is dominated with silty clay fractions. Ten meiofaunal groups contributed to the meiofaunal composition in the fjord with the dominance of foraminiferans, nematodes and tintinnids. The total density of fauna ranged from 1 ind./10 cm² to 1,560 ind./10 cm² whereas the biomass ranged from 0.06 ± 0.002 μg/10 cm² to 605.1 ± 7.19 μg/10 cm². On comparing with previous studies, our data exhibited a significant decrease in the overall density and biomass of the meiofauna. Sediment δ¹³C values were relatively low in the fjord that varied from −21.6‰ to −22.9‰, and this could be due to low CO₂ concentrations in the ambient environment. The isotopic value proves that the carbon supply in the fjord sediment is linked to the marine source largely from single-celled phytoplankton in the photic zones. Isotope value of δ¹⁵N increases in the fjord system when marine productivity is relatively high; that also varies from 4.6‰ to 6.8‰, further suggesting that the origin of fjord sediment nitrogen is supplied from the nutrient-rich warm Atlantic water masses contributing to high marine production in the fjord. TOC/TN values in the fjord were lower than 10%, which also supports our hypothesis that Kongsfjord sediment organic matter was received mainly from marine source.

中文翻译：

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北极孔峡湾沉积物碳源和氮源的稳定同位素特征及其与底栖小型动物分布的关系

本研究调查了孔斯峡湾中沉积物属性与小型动物组成模式及其食物来源的关系。峡湾中的沉积物以粉质粘土成分为主。10 个小型动物群构成了峡湾的小型动物群，其中有孔虫、线虫和丁丁目动物占主导地位。动物群的总密度介于 1 ind./10 cm ²至 1,560 ind./10 cm ^{2 之间，}而生物量介于 0.06 ± 0.002 μg/10 cm ²至 605.1 ± 7.19 μg/10 cm ^{2 之间}。与之前的研究相比，我们的数据显示小型动物的整体密度和生物量显着下降。沉积物δ ¹³峡湾中的 C 值相对较低，从 -21.6‰ 到 -22.9‰ 不等，这可能是由于周围环境中的CO ₂浓度较低。同位素值证明峡湾沉积物中的碳供应与主要来自光区的单细胞浮游植物的海洋来源有关。当海洋生产力相对较高时，峡湾系统中δ ¹⁵ N 的同位素值增加；这也从 4.6‰ 到 6.8‰ 不等，进一步表明峡湾沉积物氮的来源来自营养丰富的温暖大西洋水团，有助于峡湾的高海洋产量。峡湾中的 TOC/TN 值低于 10%，这也支持了我们的假设，即孔斯峡湾沉积物有机质主要来自海洋。