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.

底栖介形类（δ的方解石阀稳定的氧同位素的测量¹⁸ ö _OST从白令海北部和楚科齐海）被用来研究理事介形虫和相关联的海水δ生态和水文过程^18个O值。五个cryophilic类群进行了分析δ ¹⁸ Ø _OST值：Sarsicytheridea bradii; 拟副伞菌; 杂菌山梨; 法氏异形藻; 和北极亚种Normanicythere leioderma。上介形虫方解石的稳定氧同位素组成对照由第一建立物种的重要作用研究，然后比较δ ¹⁸ ö _OST到海水δ ^18个的六个夏季期间在白令海和楚科齐海取样站测量O值（即范围从-2.7至-0.5‰），CTD温度（-1.7〜8.7℃）和盐度（30-34） 2013–2018。从297δ结果¹⁸ ö _OST测量从53位点上白令海和楚科奇海大陆架是一致的时间和空间变化δ ¹⁸的大陆架底水O值，作为影响受到季节，区域水文，和物理过程（即海冰融化程度，垂直混合，沉淀/蒸发）。对于δ回归统计¹⁸ Ø _OST两个品种的价值，N. leioderma和P. pseudopunctillata表现出与温度和盐度的相关性，当应用于沉积物芯记录时，这可能有助于预测水质特征。具体而言，显著线性回归关系δ之间发现¹⁸ ö _OST的值N. leioderma和P. pseudopunctillata和温度（R ²  = 0.67分别和0.52，）。主成分分析证实温度为主要控制因素的δ ¹⁸ ö _OST除了所有种类的值S. bradii，具有鲜明的水团的样本分组在一起。的δ ¹⁸ ö _OST的值在10°C的温度范围内，布拉迪链球菌显示出较窄的值范围（约3至4.5‰）。由于强烈的重要效应和可能的其它未定因子，δ的掺入¹⁸ Ó _OST在S. bradii不是由任何明显的主要环境因素驱动。