Use of compound-specific nitrogen isotope analysis of amino acids in trophic ecology: assumptions, applications, and implications
Use of compound-specific nitrogen isotope analysis of amino acids in trophic ecology: assumptions, applications, and implications
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氨基酸化合物特异性氮同位素分析在营养生态学中的应用：假设、应用和影响
DOI：
10.1007/s11284-018-1616-y
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发表时间：
2018
影响因子：
2
通讯作者：
Ishikawa Naoto F.
中科院分区：
文献类型：
--
作者：
Ishikawa NF;Chikaraishi Y;Takano Y;Sasaki Y;Takizawa Y;Tsuchiya M;Tayasu I;Nagata T;Ohkouchi N;久米 篤;Ishikawa Naoto F.
生物体的食物来源和营养地位是食物网科学的基础。自20世纪80年代以来，13 C和15 N等轻元素的稳定同位素为各种生态系统的食物网结构提供了独特的信息。最近，新的同位素工具，如重元素的稳定同位素，放射性同位素和化合物特异性同位素分析，已被研究人员研究。在这里，我回顾了使用化合物特异性氮同位素分析的氨基酸（CSIA-AA）作为一个有用的膳食示踪剂在食物网生态学。它的三个关键特征-（1）抵消同位素变异;（2）营养歧视因子的普遍性;（3）对源混合的敏感性-与传统的同位素分析生物体的散装组织进行了比较。CSIA-AA的这三个优势将使未来的研究人员能够（1）估计动物群落的综合营养位置（iTP）;（2）推断食物网中的营养转移效率（TTE）;（3）量化不同资源对动物的贡献，所有这些对于理解生物多样性和多营养生态系统功能之间的关系至关重要。营养生态学的进一步发展将促进CSIA-AA的方法改进和更广泛的生物，食物网和生态系统的应用。
Knowledge of the diet source and trophic position of organisms is fundamental in food web science. Since the 1980s, stable isotopes of light elements such as13C and15N have provided unique information on the food web structure in a variety of ecosystems. More recently, novel isotope tools such as stable isotopes of heavy elements, radioisotopes, and compound-specific isotope analysis, have been examined by researchers. Here I reviewed the use of compound-specific nitrogen isotope analysis of amino acids (CSIA-AA) as a useful dietary tracer in food web ecology. Its three key features—(1) offsetting against isotopic variation; (2) universality of the trophic discrimination factor; and (3) sensitivity to source mixing—were compared with conventional isotope analysis for the bulk tissue of organisms. These three advantages of CSIA-AA will allow future researchers to (1) estimate the integrated trophic position (iTP) of animal communities; (2) infer trophic transfer efficiency (TTE) in food webs; and (3) quantify contributions from different resources to animals, all of which are crucial for understanding the relationship between biodiversity and multi-trophic ecosystem functioning. Further development of trophic ecology will be facilitated by both methodological refinement of CSIA-AA and its application to a wider range of organisms, food webs, and ecosystems.