Pacific Arctic Stable Isotope Synthesis [Dunton]

This dataset is a synthesis of carbon and nitrogen stable isotope data from several studies collected into a single GIS feature class. The data cover the Pacific-influenced coastal shelf ecosystem of the Arctic Ocean. Data points include isotopic ratios of del C-13 and del N-15. Additional metadata such as the names of the original data collectors are included as attributes of the feature class when available. Carbon isotope ratios are a good indicator of carbon sources of the food web because of their small enrichment steps between consecutive consumers (0-1 0/00) and nitrogen isotope ratios are good indicators of trophic level (TL) because of the larger enrichment step of 3-4 0/00 between TL. This dataset is part of the Pacific Marine Arctic Regional Synthesis (PacMARS) Project.

本数据集整合了多项研究中的碳、氮稳定同位素数据，并将其整合为单个地理信息系统要素类（GIS feature class）。数据集覆盖受太平洋影响的北冰洋沿岸陆架生态系统，数据点包含δ碳-13（δ¹³C）与δ氮-15（δ¹⁵N）的同位素比值。若可获取，原始数据采集者姓名等附加元数据将作为该要素类的属性字段予以保留。碳同位素比值可有效指示食物网的碳源，因其在相邻消费者间的同位素富集增量仅为0~1‰；氮同位素比值则可较好反映营养级（Trophic Level, TL）水平，这是由于不同营养级间的同位素富集增量可达3~4‰。本数据集隶属于太平洋-北极海洋区域综合研究（Pacific Marine Arctic Regional Synthesis, PacMARS）项目。