Supplementary Data to: "Organic Phases in Bivalve (Arctica islandica) Shells: Their Bulk and Amino Acid Nitrogen Stable Isotope Compositions" in Geochemistry, Geophysics, Geosystems

This dataset contains the data generated for publication "Organic Phases in Bivalve (Arctica islandica) Shells: Their Bulk and Amino Acid Nitrogen Stable Isotope Compositions", including the following files: Specimen_ID_shell_morphology_measurement: Description of locality of collection, shell ID, shell working ID and the shell morphology measurement which can be referred to Section 2.1 of the manuscript. EA_IRMS_raw_error_propagate: This file contains data showing the m/z 28 signal intensities of all measurements and the error propagation that mentioned in Section 2.3 of the manuscript. It also includes the calculation of analytical accuracy and precision. Statistics: The file contains the summary of statistical analyses performed in this manuscript. Refer to Section 2.7 and 3.3. Recovery: It contains the recovery of the total nitrogen contents or amino acid concentrations after different treatments and this was mentioned in Section 4.1 of the manucript. Mass_balance: The computation procedure that showed in Section 3.4 and discussed in Section 4.3 can be traced in this file. GC-C-IRMS_long_term_sd: The file shows the long-term precision of GC-C-IRMS computed from the mixed standard of amino acids BSIA_d15N: The file contains all the bulk d15N data that used in this manuscript. CSIA_d15N: The file contains all the amino acid d15N data that used in this manuscript. AA_Composition: The file shows AA percent data that used in this manuscript. For details see main text of the manuscript.本数据集对应已发表学术论文《双壳类（北极蛤 *Arctica islandica*）贝壳中的有机相：其整体及氨基酸氮稳定同位素组成》所生成的实验数据，包含以下文件： Specimen_ID_shell_morphology_measurement：该文件记录采样地点、贝壳标识编号、贝壳工作编号及贝壳形态测量数据，具体可参见论文手稿第2.1节。 EA_IRMS_raw_error_propagate：本文件包含所有测量的m/z 28信号强度，以及手稿第2.3节提及的误差传播计算过程，同时涵盖分析准确度与精密度的计算结果。 Statistics：本文件包含本研究手稿中开展的全部统计分析汇总结果，可参见手稿第2.7节与第3.3节。 Recovery：本文件收录经不同实验处理后测得的总氮含量或氨基酸（AA）浓度的回收率数据，对应手稿第4.1节内容。 Mass_balance：本文件包含手稿第3.4节展示、第4.3节讨论的质量平衡计算流程。 GC-C-IRMS_long_term_sd：本文件展示了基于氨基酸混合标准品计算得到的气相色谱-燃烧-同位素比值质谱（GC-C-IRMS）长期精密度。 BSIA_d15N：本文件包含本研究手稿中使用的所有整体氮稳定同位素比值（δ¹⁵N）数据。 CSIA_d15N：本文件包含本研究手稿中使用的所有氨基酸氮稳定同位素比值（δ¹⁵N）数据。 AA_Composition：本文件展示了本研究手稿中使用的氨基酸百分比组成数据。 详细内容请参见论文手稿正文。