Stable oxygen isotope measurements on calcitic valves of benthic ostracodes (δ¹⁸O_ost) from the northern Bering and Chukchi Seas were used to examine ecological and hydrographic processes governing ostracode and associated seawater δ¹⁸O values. Five cryophilic taxa were analyzed for δ¹⁸O_ost values: Sarsicytheridea bradii; Paracyprideis pseudopunctillata; Heterocyprideis sorbyana; Heterocyprideis fascis; and the subarctic species Normanicythere leioderma. Controls on the stable oxygen isotope composition of ostracode calcite were investigated by first establishing species' vital effects and then comparing δ¹⁸O_ost to seawater δ¹⁸O values (that ranged from −2.7 to −0.5‰), CTD temperature (−1.7 to 8.7 °C) and salinity (30–34) measured at sampling stations in the Bering and Chukchi Seas during the six summers of 2013–2018. Results from 297 δ¹⁸O_ost measurements from 53 sites on the Bering and Chukchi Sea continental shelves are consistent with the temporal and spatial variation in δ¹⁸O values of continental shelf bottom water, as impacted by seasonality, regional hydrography, and physical processes (i.e., sea-ice melt and extent, vertical mixing, precipitation/evaporation). Regression statistics for δ¹⁸O_ost values of two species, N. leioderma and P. pseudopunctillata, showed correlations to temperature and salinity that may facilitate prediction of water-mass characteristics when applied to sediment core records. Specifically, a significant linear regression relationship was found between δ¹⁸O_ost values of N. leioderma and P. pseudopunctillata and temperature (R² = 0.67 and 0.52, respectively). A principal component analysis confirmed temperature as the main controlling factor in the δ¹⁸O_ost values of all species except S. bradii, with samples of distinct water masses grouping together. The δ¹⁸O_ost values of S. bradii exhibited a narrow range of values (~3 to 4.5‰) across a temperature range of 10 °C. Due to strong vital effects and possibly other undetermined factors, the incorporation of δ¹⁸O_ost in S. bradii was not driven by any obvious predominant environmental factors.

对来自北白令海和楚科奇海的底栖介形动物 (δ ¹⁸ O _{ost ) 的方解石阀门进行的稳定氧同位素测量用于检查控制介形动物和相关海水 δ} ¹⁸ O 值的生态和水文过程。分析了五个低温分类群的 δ ¹⁸ O _ost值：Sarsicytheridea bradii；Paracyprideis pseudopunctillata; 山梨杂环草；Heterocyprideis fascis; 和亚北极物种Normanicythere leioderma。首先确定物种的生命效应，然后比较δ ¹⁸ O _{ost ，研究了对介形方解石稳定氧同位素组成的控制。}海水 δ ¹⁸ O 值（范围从 -2.7 到 -0.5‰）、CTD 温度（-1.7 到 8.7 °C）和盐度（30-34）在白令海和楚科奇海的采样站在 6 个夏季期间测量2013-2018 年。来自白令海和楚科奇海大陆架 53 个地点的297 次 δ ¹⁸ O _ost测量结果与受季节性、区域水文和物理过程影响的大陆架底水δ ¹⁸ O 值的时空变化一致。即海冰融化和范围、垂直混合、降水/蒸发）。^{两个物种的 δ 18} O _ost值的回归统计， N. leioderma和P. pseudopunctillata显示出与温度和盐度的相关性，当应用于沉积物岩心记录时，这可能有助于预测水体特征。具体而言，发现在N. leioderma和P. pseudopunctillata的 δ ¹⁸ O _ost值与温度之间存在显着的线性回归关系（R ²  = 0.67 和 0.52，分别）。主成分分析证实温度是除S. bradii之外的所有物种的 δ ¹⁸ O _ost值的主要控制因素，不同水团的样品组合在一起。的 δ ¹⁸ O _ost值S. bradii在 10 °C 的温度范围内表现出窄范围的值（~3 到 4.5‰）。由于强烈的生命效应和可能的其他未确定因素，δ ¹⁸ O _ost在S. bradii中的掺入不是由任何明显的主要环境因素驱动的。