Effect of lipid extraction on the interpretation of fish community trophic relationships determined by stable carbon and nitrogen isotopes
Effect of lipid extraction on the interpretation of fish community trophic relationships determined by stable carbon and nitrogen isotopes
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DOI：
10.1139/f06-116
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发表时间：
2006-10
影响因子：
2.4
通讯作者：
B. Murry;J. M. Farrell;M. Teece;Peter M. Smyntek
中科院分区：
文献类型：
--
作者：
B. Murry;J. M. Farrell;M. Teece;Peter M. Smyntek
碳（C）和氮（N）的稳定同位素通常用于评估营养关系和食物网结构;然而，是否提取脂质的决定可能会影响结果的解释。脂质提取不是一种普遍的做法，因此汇总或比较不同研究的结果可能并不总是合适的。此外，常见的脂质提取技术不仅去除脂质，而且去除可能改变样品δ 15 N值的含N化合物。我们研究了不同的鱼类群落营养结构的解释来自δ 13 C和δ 15 N稳定同位素数据的基础上脂质提取和非提取样品从9种淡水鱼类。脂肪提取显著增加了δ 13 C和δ 15 N，导致整体食物网位置的正向转变。同位素变化的幅度没有，但是，物种之间的差异，这样的鱼类群落结构的整体解释没有改变。碳和氮同位素的一致增加...
Stable isotopes of carbon (C) and nitrogen (N) are commonly used to evaluate trophic relationships and food web structure; however, the decision to extract lipids or not may influence the interpretation of results. Lipid extraction is not a universal practice, thus pooling or comparing results across studies may not always be appropriate. Additionally, common lipid extraction techniques remove not only lipids, but also N-containing compounds that may alter the δ15N value of a sample. We examined differences in the interpretation of fish community trophic structure derived from δ13C and δ15N stable isotope data based on lipid-extracted and nonextracted samples from nine freshwater fish species. Lipid extraction significantly increased δ13C and δ15N, causing a positive shift in overall food web placement. The magnitude of isotopic change did not, however, differ among species, such that the overall interpretation of the fish community structure was not altered. The consistent increase in both C and N isotop...