Data Paper. Data Paper

File List SIA_N_C_Atlantic_marine_fishes_squids_20150105_v1.csv (MD5: 727079426b7882df65f92a6eeaf5d756) Description Nitrogen and carbon stable isotope data are frequently used to describe the origins and transformations of organic matter. Nitrogen stable isotopes (δ15N) in tissue are used to estimate species’ trophic levels, the extent of omnivory, food chain length, and community-wide relationships between body size and trophic level; the latter leading to estimates of predator–prey mass ratios for parameterization, calibration, and validation of food web models. Carbon stable isotopes (δ13C) are used to identify pathways linking producers and consumers and for studies of migration and movement. Collectively, δ15N and δ13C, often with other stable isotopes such as δ34S, may be used to define the contribution of different producers and pathways to consumer production, to assess the trophic impacts of invasive species and habitat modification, and to predict past habitat use, movements, and migrations. Stable isotope data often complement dietary data (e.g., from stomach contents) in food web studies, because stable isotope composition is indicative of assimilated diet over months to years, depending on species, size, environment, and tissue type. There are relatively few large-scale compilations of δ15N and δ13C data for marine species from offshore habitats, but such data facilitate comparative analysis and research into food web structure and function. The data provided comprise 5535 records for individuals of 62 species of fish and squid weighing 0.3 g to 17920 g and sampled from the northeast Atlantic shelf seas (Celtic Sea, North Sea, Irish Sea, Channel) from 2002 to 2010. For every sampled individual the record lists: species name, date of sampling, position of sampling, body mass, percentage nitrogen in muscle tissue, percentage carbon in muscle tissue, and δ15N and δ13C natural abundance in muscle tissue. Awareness of, and access to, these data should catalyze and facilitate new research with stable isotopes, to improve understanding of marine biology, food web ecology, and human impacts on the environment. Key words: body size; cephalopod; consumer; elasmobranch; food chain; food web; marine; producer; teleost; trophic position; stable isotopes.

文件列表：SIA_N_C_Atlantic_marine_fishes_squids_20150105_v1.csv（MD5：727079426b7882df65f92a6eeaf5d756）
数据集描述：氮与碳稳定同位素（stable isotope）常被用于解析有机质的来源与转化过程。生物体组织中的氮稳定同位素（δ¹⁵N）可用于估算物种的营养级（trophic level）、杂食性程度、食物链长度，以及群落内体型与营养级间的关联；基于该关联可推算捕食者-猎物质量比，用于食物网模型的参数化、校准与验证。碳稳定同位素（δ¹³C）则可用于识别生产者与消费者间的营养通路，同时支持物种迁移与移动相关研究。
通常可联合使用δ¹⁵N、δ¹³C及其他稳定同位素（如δ³⁴S），明确不同生产者及营养通路对消费者生物量的贡献，评估入侵物种与生境改造的营养效应，还可预测物种过往的生境利用、移动与迁徙模式。稳定同位素数据常可补充食物网研究中的饮食数据（例如基于胃含物（stomach contents）的饮食数据），这是因为稳定同位素组成能够反映物种在数月至数年尺度上的同化饮食特征，具体时长取决于物种、体型、生存环境与组织类型。
目前针对近海生境海洋物种的δ¹⁵N与δ¹³C数据大规模汇编成果相对匮乏，但这类数据可有效助力食物网结构与功能的比较分析及相关研究。本数据集涵盖2002年至2010年间，从东北大西洋陆架海域（凯尔特海、北海、爱尔兰海、英吉利海峡）采集的62种鱼类与头足类（cephalopod）个体共计5535条记录，个体体质量范围为0.3 g至17920 g。每条采样个体的记录包含以下信息：物种名称、采样日期、采样点位、体质量、肌肉组织氮含量百分比、肌肉组织碳含量百分比，以及肌肉组织中δ¹⁵N与δ¹³C的自然丰度。
本数据集的公开与获取将推动并助力稳定同位素相关的全新研究，助力深化学界对海洋生物学、食物网生态学以及人类活动对环境影响的认知。
关键词：体型（body size）；头足类（cephalopod）；消费者；板鳃类（elasmobranch）；食物链；食物网；海洋；生产者；硬骨鱼（teleost）；营养位置（trophic position）；稳定同位素（stable isotope）