Nitrogen isotopic fractionation during a simulated diatom spring bloom: importance of N-starvation in controlling fractionation
文献类型：期刊论文
| 作者 | Waser, NA; Yu, ZM ; Yin, KD; Nielsen, B; Harrison, PJ; Turpin, DH; Calvert, SE
|
| 刊名 | MARINE ECOLOGY PROGRESS SERIES
 |
| 出版日期 | 1999 |
| 卷号 | 179页码:291-296 |
| 关键词 | n Isotope Fractionation N-15/n-14 Nitrate Uptake Ammonium Uptake Diatoms Spring Bloom |
| ISSN号 | 0171-8630 |
| 文献子类 | Article |
| 英文摘要 | N isotope fractionation (epsilon) was first determined during ambient NO3- depletion in a simulated diatom spring bloom. After 48 h of N-starvation, NH4+ was resupplied to the diatoms in small pulses to simulate grazer-produced N and then epsilon was determined. Large variations in epsilon values were observed: from 2.0-3.6 to 14-0 parts per thousand during NO3- and NH4+ uptake, respectively. This is the first study reporting an epsilon value as low as 0 to 2 parts per thousand for NH4+ uptake and we suggest that greater N demand after N-starvation may have drastically reduced NH3 efflux out of the cells. Thus the N status of the phytoplankton and not the ambient NH4+ concentration may be the important factor controlling epsilon, because, when N-starvation increased, epsilon values for NH4+ uptake decreased within 30 h. This study may thus have important implications for interpreting the delta(15)N of particulate N in nutrient-depleted regimes in temperate coastal oceans.; N isotope fractionation (epsilon) was first determined during ambient NO3- depletion in a simulated diatom spring bloom. After 48 h of N-starvation, NH4+ was resupplied to the diatoms in small pulses to simulate grazer-produced N and then epsilon was determined. Large variations in epsilon values were observed: from 2.0-3.6 to 14-0 parts per thousand during NO3- and NH4+ uptake, respectively. This is the first study reporting an epsilon value as low as 0 to 2 parts per thousand for NH4+ uptake and we suggest that greater N demand after N-starvation may have drastically reduced NH3 efflux out of the cells. Thus the N status of the phytoplankton and not the ambient NH4+ concentration may be the important factor controlling epsilon, because, when N-starvation increased, epsilon values for NH4+ uptake decreased within 30 h. This study may thus have important implications for interpreting the delta(15)N of particulate N in nutrient-depleted regimes in temperate coastal oceans. |
| 学科主题 | Ecology ; Marine & Freshwater Biology ; Oceanography |
| 语种 | 英语 |
| WOS记录号 | WOS:000080261400025 |
| 公开日期 | 2010-12-22 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/2849]  |
| 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, Qingdao 266071, Shandong, Peoples R China 3.Queens Univ, Dept Biol, Kingston, ON K7L 3N6, Canada |
| 推荐引用方式 GB/T 7714 | Waser, NA,Yu, ZM,Yin, KD,et al. Nitrogen isotopic fractionation during a simulated diatom spring bloom: importance of N-starvation in controlling fractionation[J]. MARINE ECOLOGY PROGRESS SERIES,1999,179:291-296. |
| APA | Waser, NA.,Yu, ZM.,Yin, KD.,Nielsen, B.,Harrison, PJ.,...&Calvert, SE.(1999).Nitrogen isotopic fractionation during a simulated diatom spring bloom: importance of N-starvation in controlling fractionation.MARINE ECOLOGY PROGRESS SERIES,179,291-296. |
| MLA | Waser, NA,et al."Nitrogen isotopic fractionation during a simulated diatom spring bloom: importance of N-starvation in controlling fractionation".MARINE ECOLOGY PROGRESS SERIES 179(1999):291-296. |
入库方式： OAI收割
来源：海洋研究所
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