Gulf of Maine bulk and amino acid nitrogen isotope data from 1783-2010 measured from Arctica islandica shells

The data presented here are bulk and amino acid nitrogen isotopes and amino acid concentrations measured in Arctica islandica shells collected from the Gulf of Maine between 2009 and 2014. The samples are dated between 1783 and 2010 C.E. using cross-dating techniques. Three different tissue types were analyzed: periostracum, calcium carbonate shell, and adductor muscle. Carbon isotopes of periostracum are also presented. Isotope data were analyzed using an isotope ratio mass spectrometer coupled with a Gas Chromatograph and an Elemental Analyzer for amino acid and bulk analyses, respectively. Amino acid concentration data were analyzed using a Flame Ionization Detector and concentration curves. Trophic position of Arctica islandica through time was determined using a trophic position equation gleaned from the literature.

本数据集呈现了自2009年至2014年间从缅因湾采集的环斑海豹(Arctica islandica)贝壳中测定的 bulk 和氨基酸氮同位素以及氨基酸浓度。样本年代介于1783年至公元2010年之间，通过交叉定年技术进行测定。分析了三种不同的组织类型：贝壳外层、碳酸钙贝壳和闭壳肌。此外，还展示了贝壳外层的碳同位素数据。同位素数据通过质谱仪与气相色谱和元素分析仪耦合进行测定，分别用于氨基酸和bulk分析。氨基酸浓度数据通过火焰电离检测器和浓度曲线进行分析。利用文献中摘录的摄食位方程，确定了环斑海豹随时间的摄食位置。