Stable nitrogen isotopes in zooplankton: Some geographic and temporal variations in the North Pacific'
Stable nitrogen isotopes in zooplankton: Some geographic and temporal variations in the North Pacific'
复制标题
浮游动物中的稳定氮同位素：北太平洋的一些地理和时间变化
DOI：
10.4319/lo.1984.29.6.1267
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发表时间：
1984
期刊：
影响因子：
--
通讯作者：
R. Eppley
中科院分区：
文献类型：
--
作者：
M. M. Mullin;G. Rau;R. Eppley
南加利福尼亚湾桡足类和毛齿类动物的15N:14N比值高于北太平洋中央环流。在夜间，当N03-是浮游植物主要的氮养分时，浮游动物在15N下的富集程度高于其他时间。15N的富集与富营养区与深层水体之间的氮交换程度有关，而中心环流中较低的15N:14N比值也可能与固氮作用的重要性有关。相比之下，浮游动物fY3C的地理和时间变化不大。
Copepods and chaetognaths from the Southern California Bight had higher 15N:14N ratios than did those from the North Pacific Central Gyre. Within the bight, zooplankters were more enriched in 15N when N03- was the major nitrogenous nutrient for phytoplankton than at other times. The 15N enrichment is related to the degree of exchange of nitrogen between the euphotic zone and deeper water, and the low 15N:14N ratio in the central gyre is probably also related to the importance of nitrogen fixation. In contrast, little geographic or temporal variation was observed in zooplanktonic fY3C.