Comparing trophic position of freshwater fish calculated using stable nitrogen isotope ratios (δ15N) and literature dietary data
Comparing trophic position of freshwater fish calculated using stable nitrogen isotope ratios (δ15N) and literature dietary data
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DOI：
10.1139/f97-016
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发表时间：
1997-05
影响因子：
2.4
通讯作者：
M. J. Zanden;G. Cabana;J. Rasmussen
中科院分区：
文献类型：
--
作者：
M. J. Zanden;G. Cabana;J. Rasmussen
稳定氮同位素比值（δ 15 N）通常用于代表水生系统的营养结构，但δ 15 N指示水生消费者的营养位置的能力仍然没有使用传统的饮食方法进行测试。解释三角洲15 N的水生消费者相对于大型，长寿的主要消费者，如蚌类贻贝提供了一个连续的测量生物体的营养位置，调整基线三角洲15 N的系统变化。我们用这种方法来估计8个沿岸的鱼类的营养位置，从36个湖泊在安大略和魁北克。我们验证了这些三角洲15 N营养位置的措施，通过汇编文献饮食数据，从342个人口的这些相同的鱼类，并计算出一个连续的措施，每个人口的营养位置。平均膳食营养位置估计值与15 N估计值密切相关，平均营养位置范围从南瓜籽（Lepomis gobbosus）的3.3到海象（St.
Stable nitrogen isotope ratios ( delta 15N) are commonly used to represent the trophic structure of aquatic systems, yet the ability of delta 15N to indicate the trophic position of aquatic consumers remains untested using traditional dietary methods. Interpreting the delta 15N of aquatic consumers relative to large, long-lived primary consumers such as unionid mussels provides a continuous measure of an organism's trophic position that adjusts for among-system variation in baseline delta 15N. We used this method to estimate the trophic position of eight littoral fish species from 36 lakes in Ontario and Quebec. We validated these delta 15N measures of trophic position by compiling literature dietary data from 342 populations of these same fish species and calculated a continuous measure of trophic position for each population. Mean dietary trophic position estimates corresponded closely to 15N estimates, with mean trophic position ranging from 3.3 for pumpkinseed (Lepomis gobbosus) to 4.4 for walleye (St...