Global trophic position comparison of two dominant mesopelagic fish families (Myctophidae, Stomiidae) using amino acid nitrogen isotopic analyses.
Global trophic position comparison of two dominant mesopelagic fish families (Myctophidae, Stomiidae) using amino acid nitrogen isotopic analyses.
复制标题
DOI：
10.1371/journal.pone.0050133
复制
发表时间：
2012
期刊：
影响因子：
3.7
通讯作者：
Sutton TT
中科院分区：
文献类型：
--
作者：
Choy CA;Davison PC;Drazen JC;Flynn A;Gier EJ;Hoffman JC;McClain-Counts JP;Miller TW;Popp BN;Ross SW;Sutton TT
生物体的 δ15N 值通常在不同的生态系统中用于估计营养位置并推断营养连通性。我们利用氨基酸氮同位素组成，对两个生态特征良好且不同的主要中层水域鱼类消费者群体的营养位置进行了新颖的跨流域比较。我们发现，尽管体组织 δ15N 值存在很大差异，但根据单个氨基酸的 δ15N 值估计的营养位置在全球五个区域的这些鱼类的两个科中几乎是一致的。苯丙氨酸 δ15N 值的区域差异证实，大量组织 δ15N 值反映了控制食物网底部 δ15N 值的区域特定水体生物地球化学。根据灯笼鱼（灯笼鱼科）的氨基酸同位素分析（AA-TP）计算出的营养位置（AA-TP～2.9）与胃内容物研究的预期（TP～3.2）基本一致，而龙鱼（Stomiidae科）的AA-TP（AA-TP～3.2）低于胃内容物研究得出的TP（TP～4.1）。我们证明，氨基酸氮同位素分析可以克服生物地球化学不同系统中大量组织同位素分析的缺点，以提供有关海洋食物网结构的全球比较信息。
The δ15N values of organisms are commonly used across diverse ecosystems to estimate trophic position and infer trophic connectivity. We undertook a novel cross-basin comparison of trophic position in two ecologically well-characterized and different groups of dominant mid-water fish consumers using amino acid nitrogen isotope compositions. We found that trophic positions estimated from the δ15N values of individual amino acids are nearly uniform within both families of these fishes across five global regions despite great variability in bulk tissue δ15N values. Regional differences in the δ15N values of phenylalanine confirmed that bulk tissue δ15N values reflect region-specific water mass biogeochemistry controlling δ15N values at the base of the food web. Trophic positions calculated from amino acid isotopic analyses (AA-TP) for lanternfishes (family Myctophidae) (AA-TP ∼2.9) largely align with expectations from stomach content studies (TP ∼3.2), while AA-TPs for dragonfishes (family Stomiidae) (AA-TP ∼3.2) were lower than TPs derived from stomach content studies (TP∼4.1). We demonstrate that amino acid nitrogen isotope analysis can overcome shortcomings of bulk tissue isotope analysis across biogeochemically distinct systems to provide globally comparative information regarding marine food web structure.
登录
查看更多内容
DOI：
10.1016/j.dsr.2010.05.003
发表时间：
2010-08-01
影响因子：
2.4
作者：
Hoffman, Joel C.;Sutton, Tracey T.
通讯作者：
Sutton, Tracey T.
影响因子：
2
作者：
Jennings, Simon;Barnes, Carolyn;Polunin, Nicholas V. C.
通讯作者：
Polunin, Nicholas V. C.
影响因子：
2.4
作者：
ROSECCHI, E;TRACEY, DM;WEBBER, WR
通讯作者：
WEBBER, WR
影响因子：
4.5
作者：
Dore, JE;Brum, JR;Karl, DM
通讯作者：
Karl, DM
影响因子：
5
作者：
DENIRO, MJ;EPSTEIN, S
通讯作者：
EPSTEIN, S