Determination of precise nitrogen stable isotopic baselines from heterotrophic organism in coastal ocean environments using compound specific isotope analysis of amino acids

被引：8

作者：

Choi, Bohyung ^{[1
,2
]}

Shin, Kyung-Hoon ^{[1
]}

机构：

[1] Hanyang Univ, Dept Marine Sci & Convergent Technol, Ansan 426791, South Korea

[2] Chonnam Natl Univ, Fisheries Sci Inst, Gwangju, South Korea

来源：

MARINE POLLUTION BULLETIN | 2021年 / 171卷

基金：

新加坡国家研究基金会;

关键词：

Nitrogen isotope; Isotopic baseline; CSIA of amino acids; Trophic position; TROPHIC POSITION; ZOOPLANKTON; DELTA-N-15; FRACTIONATION; NITRATE; RATIOS; PARTICULATE; INDICATORS; POLLUTION; FIXATION;

D O I：

10.1016/j.marpolbul.2021.112777

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

We sampled mussels (Mytilus edulis) along the coast of the Korean peninsula, and determined their trophic position (TP) using the nitrogen isotope ratio of amino acids (TPglu/phe). The TPglu/phe of mussels (2.0 to 2.5) is higher than TP of herbivores, suggesting that TP normalization is required to remove the trophic enrichment effect on basal nitrogen isotope ratio. We found similar trends in spatial variation between nitrogen isotopic baseline based on nitrogen isotope ratio of bulk tissue (delta N-15(base-bulk)) and that of phenylalanine (delta N-15(base-phe)) in mussels, reflecting different nitrogen sources among sampling sites. The present study suggests that delta N-15(base-bulk) and delta N-15(base-phe) are powerful tools to trace nitrogen isotopic baselines from primary consumers as well as higher TP organisms.

引用

页数：6