Oxygen isotopes of waters and bivalves from the Coorong Lagoon, South Australia, from 2016-2018

To assess the fractionation of oxygen isotopes into the bivalve species Arthritica helmsi, live bivalve shells were collected alongside the waters in which they inhabit. Samples were collected at sites along the Coorong Lagoon and Lake Alexandrina in South Australia – the estuarine system at the terminus of Australia’s Murray River. Whole shell analyses of oxygen and carbon isotopes (n = 135) were measured on samples collected on 6 occasions from November 2016 to May 2018. Oxygen and hydrogen isotope analyses of waters were measured along with salinity and temperature monthly over the same time period (n = 137).

为探究氧同位素在双壳类物种Arthritica helmsi中的分馏效应，研究人员采集了该物种栖息水域内的活体双壳类壳体。样本采集于澳大利亚南澳州的库龙潟湖（Coorong Lagoon）与亚历山德里娜湖（Lake Alexandrina）沿岸站点——该区域为澳大利亚墨累河入海口处的河口湾系统。2016年11月至2018年5月期间，共开展6次采样，对其中135份样品完成了全壳体氧、碳同位素分析；同期每月同步采集水样，开展氧、氢同位素分析并测定盐度与温度，累计获取137组水环境数据。