Sea-ice meiofauna biodiversity from the Nansen Legacy joint cruise JC2-2 (cruise number: 2021710)

The data was collected during the Nansen Legacy joint cruise (JC2-2, cruise number: 2021710) from 24.08 - 25.09.2021 onboard the research vessel RV Kronprins Haakon, along a transect in the Arctic Basin from 81N to 87N. The dataset contains abundance and biomass of sea-ice meiofauna (> 20 µm) including large protists such as foraminifers and ciliates and metazoans eggs. Sea-ice meiofauna were identified and counted with stereo microscopy and result are given as Individuals per liter (cells/L) and Individuals per square meter (Ind/m2). Biomass (μg C Ind.-1) was only determined for alive individuals according to carbon contents for ice meiofauna taxa based on literature summarized in Ehrlich et al. (2021, doi: https://doi.org/10.1525/elementa.2020.00169), and carbon values for foraminifers were provided by de Freitas et al. (2021) for benthic species (Bolivinia sp.: 0.00875 μg C Ind.-1; Elphidium sp.: 0.126 μg C Ind.-1, https://doi.org/10.2113/gsjfr.51.4.249) and Anglada-Ortiz et al. (submitted to PiO) for the pelagic species Neogloboquadrina pachyderma (0.0013 μg C Ind.-1).

本数据集收录了在纳森遗产联合航次（JC2-2，航次编号：2021710）期间，于2021年8月24日至9月25日搭载研究船RV克朗普林斯哈康，在北冰洋海域81N至87N经度范围内进行横断面调查所收集的数据。数据集涵盖了海冰中微动物群（> 20 µm）的丰度和生物量，包括大型原生生物如有孔虫和纤毛虫以及无脊椎动物卵。海冰中微动物群通过立体显微镜进行鉴定和计数，结果以每升（细胞/L）和每平方米（个体/m²）的个体数给出。生物量（μg C Ind.-1）仅对活体个体进行测定，依据Ehrlich等人（2021年，DOI：https://doi.org/10.1525/elementa.2020.00169）总结的文献中冰中微动物群类群的碳含量进行估算，而有孔虫的碳值由de Freitas等人（2021年）提供，针对底栖物种（Bolivinia sp.：0.00875 μg C Ind.-1；Elphidium sp.：0.126 μg C Ind.-1，DOI：https://doi.org/10.2113/gsjfr.51.4.249）以及Anglada-Ortiz等人（投稿至PiO）针对浮游物种Neogloboquadrina pachyderma（0.0013 μg C Ind.-1）提供。