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（bivalve）物种Arthritica helmsi壳体中的分馏效应，研究人员于该物种的栖息水域采集活体双壳类壳体。样本采集于澳大利亚南澳大利亚州的库龙潟湖（Coorong Lagoon）与亚历山德里纳湖（Lake Alexandrina）沿岸站点——该区域为澳大利亚墨累河（Murray River）入海口处的河口湾系统。研究于2016年11月至2018年5月期间开展，期间共完成6次采样，对所获样本开展氧、碳同位素全壳体分析，有效样本量为135（n=135）；同期每月对水体开展氧、氢同位素分析，并同步测定盐度与温度，有效样本量为137（n=137）。