Nitrogen isotope fractionation during nitrate, ammonium and urea uptake by marine diatoms and coccolithophores under various conditions of N availability
文献类型：期刊论文
| 作者 | Waser, NA; Yin, KD; Yu, ZM ; Tada, K; Harrison, PJ; Turpin, DH; Calvert, SE
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| 刊名 | MARINE ECOLOGY PROGRESS SERIES
 |
| 出版日期 | 1998 |
| 卷号 | 169页码:29-41 |
| 关键词 | Isotope Fractionation N-15/n-14 Nitrogen Uptake Diatoms Coccolithophores Nitrate Ammonium Urea |
| ISSN号 | 0171-8630 |
| 文献子类 | Article |
| 英文摘要 | Stable isotopes of N provide a new approach to the study of algal production in the ocean, yet knowledge of the isotope fractionation (epsilon) in various oceanic regimes is lacking. Here we report large and rapid changes in isotope composition (delta(15)N) of 2 coastal diatoms and 2 clones (open and coastal) of a coccolithophore grown in the simultaneous presence of nitrate, ammonium and urea under varying conditions of N availability (i.e. N-sufficiency and N-starvation followed by N-resupply) and hence different physiological states, During N-sufficiency, the delta(15)N of particulate organic N (PON) was well reproduced, using a model derived from Rayleigh distillation theory, with constant epsilon similar to that for growth on each individual N source. However, following N-resupply, the variations in delta(15)N(PON) could be well explained only in the case of the open ocean Emiliania huxleyi, with epsilon similar to N-sufficient conditions. It was concluded that the mechanism of isotope fractionation changed rapidly with N availability for the 3 coastal clones. However, in the case of E. huxleyi isolated from the Subarctic Pacific Ocean, no evidence of a change in mechanism was found, suggesting that perhaps open ocean species can quickly recover from N-depleted conditions.; Stable isotopes of N provide a new approach to the study of algal production in the ocean, yet knowledge of the isotope fractionation (epsilon) in various oceanic regimes is lacking. Here we report large and rapid changes in isotope composition (delta(15)N) of 2 coastal diatoms and 2 clones (open and coastal) of a coccolithophore grown in the simultaneous presence of nitrate, ammonium and urea under varying conditions of N availability (i.e. N-sufficiency and N-starvation followed by N-resupply) and hence different physiological states, During N-sufficiency, the delta(15)N of particulate organic N (PON) was well reproduced, using a model derived from Rayleigh distillation theory, with constant epsilon similar to that for growth on each individual N source. However, following N-resupply, the variations in delta(15)N(PON) could be well explained only in the case of the open ocean Emiliania huxleyi, with epsilon similar to N-sufficient conditions. It was concluded that the mechanism of isotope fractionation changed rapidly with N availability for the 3 coastal clones. However, in the case of E. huxleyi isolated from the Subarctic Pacific Ocean, no evidence of a change in mechanism was found, suggesting that perhaps open ocean species can quickly recover from N-depleted conditions. |
| 学科主题 | Ecology ; Marine & Freshwater Biology ; Oceanography |
| 语种 | 英语 |
| WOS记录号 | WOS:000075589000003 |
| 公开日期 | 2010-12-22 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/2861]  |
| 专题 | 海洋研究所_海洋生态与环境科学重点实验室 |
| 作者单位 | 1.Univ British Columbia, Dept Earth & Ocean sci, Vancouver, BC V6T 1Z4, Canada 2.Chinese Acad Sci, Inst Oceanol, Shandong 266071, Peoples R China 3.Kagawa Univ, Fac Agr, Dept Bioresource Sci, Miki, Kagawa 76107, Japan 4.Queens Univ, Dept Biol, Kingston, ON K7L 3N6, Canada |
| 推荐引用方式 GB/T 7714 | Waser, NA,Yin, KD,Yu, ZM,et al. Nitrogen isotope fractionation during nitrate, ammonium and urea uptake by marine diatoms and coccolithophores under various conditions of N availability[J]. MARINE ECOLOGY PROGRESS SERIES,1998,169:29-41. |
| APA | Waser, NA.,Yin, KD.,Yu, ZM.,Tada, K.,Harrison, PJ.,...&Calvert, SE.(1998).Nitrogen isotope fractionation during nitrate, ammonium and urea uptake by marine diatoms and coccolithophores under various conditions of N availability.MARINE ECOLOGY PROGRESS SERIES,169,29-41. |
| MLA | Waser, NA,et al."Nitrogen isotope fractionation during nitrate, ammonium and urea uptake by marine diatoms and coccolithophores under various conditions of N availability".MARINE ECOLOGY PROGRESS SERIES 169(1998):29-41. |
入库方式： OAI收割
来源：海洋研究所
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