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| DOI | 10.1126/science.286.5449.2485 |
| Oligotrophy and nitrogen fixation during eastern Mediterranean sapropel events | |
| Sachs J.P.; Repeta D.J. | |
| 发表日期 | 1999 |
| ISSN | 0036-8075 |
| 起始页码 | 2485 |
| 结束页码 | 2488 |
| 卷号 | 286期号:5449 |
| 英文摘要 | Nitrogen isotopic measurements in fossil chlorophyll from late Pleistocene organic-rich sediments (sapropels) in the eastern Mediterranean Sea provide geochemical evidence for stratified, nutrient-depleted surface water and extensive nitrogen fixation. This evidence is reconciled with previous indications of high productivity by invoking a model of sapropel formation in which increased river discharge facilitates development of a specialized phytoplankton population whose annual mass sinking provides the organic flux to generate sapropels. This interpretation is consistent with the widespread occurrence of mat-forming diatoms that thrive in stratified water and can harbor diazotrophic bacterial symbionts, but does not support eutrophication of surface waters by enhanced river runoff or a circulation reversal. |
| 英文关键词 | chlorophyll; nitrogen; nitrogen fixation; oligotrophic environment; Pleistocene; sapropel; article; ecology; fossil; geology; Mediterranean Sea; nitrogen fixation; priority journal; sediment; Mediterranean Sea |
| 语种 | 英语 |
| 来源期刊 | Science
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/245315 |
| 作者单位 | Department of Environmental Science, Barnard College, Columbia University, 3009 Broadway, New York, NY 10027, United States; Dept. of Mar. Chem. and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, United States |
| 推荐引用方式 GB/T 7714 | Sachs J.P.,Repeta D.J.. Oligotrophy and nitrogen fixation during eastern Mediterranean sapropel events[J],1999,286(5449). |
| APA | Sachs J.P.,&Repeta D.J..(1999).Oligotrophy and nitrogen fixation during eastern Mediterranean sapropel events.Science,286(5449). |
| MLA | Sachs J.P.,et al."Oligotrophy and nitrogen fixation during eastern Mediterranean sapropel events".Science 286.5449(1999). |
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