| DOI: | 10.2172/1120791
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| 报告题名: | Organic Matter Composition, Recycling Susceptibility, and the Effectiveness of the Biological Pump â An Evaluation Using NMR Spectra of Marine Plankton |
| 作者: | Paytan, Adina
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| 出版年: | 2014
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| 发表日期: | 2014-02-19
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| 总页数: | 3
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| 国家: | 美国
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| 语种: | 英语
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| 英文关键词: | Oceanography
; Nutrients
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| 中文主题词: | 大气科学
; 碳
; 有机物
; 吸收
; 浮游生物
; 微量营养物/微量元素
; 再利用
; 吸附作用
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| 主题词: | ATMOSPHERE
; CARBON
; ORGANIC MATTER
; ABSORPTION
; PLANKTON
; NUTRIENTS
; RECYCLING
|
| 英文摘要: | Carbon (C) sequestration through fertilization of phytoplankton with micronutrients and enhancement of the absorption and retention of atmospheric C by ocean biota heavily depends on the efficiency of the âbiological pumpâ. The long-term effectiveness of this strategy depends on a net transfer of C from the upper ocean-atmosphere system to the deep ocean where the C is removed from contact with the atmosphere for an extended period of time. This C removal can be equated to the amount of C fixation by phytoplankton minus the C cycling and regeneration in the euphotic zone. If the regeneration efficiency is increased, then despite increased C fixation, no net loss (sequestration) of C will result. A reduction in cycling efficiency in the euphotic zone, on the other hand, will increase the effectiveness of the âbiological pumpâ and thus C sequestration. The degree of organic matter biodegradation and recycling depends on the âreactivityâ of compounds synthesized by the biota, which in turn, is controlled by the structural characteristic of these compounds. There is considerable evidence that different phytoplankton taxa differ substantially in their biogeochemical characteristics and it is likely that the relative abundance of different compounds synthesized by these distinct taxa, and even within each group at different growth conditions, will differ too. This variability in biosynthesis and thus abundance of a wide range of organic compounds in the water column would lend itself to different susceptibility for biodegradation and regeneration. Knowledge of the distribution of various organic matter structural groups synthesized by distinct taxa, the dependence of the organic matter compound classes on different growth conditions (temperature, light, nutrients) and the selective susceptibility of these compound to regeneration is crucial for estimating the potential for rapid regeneration in the euphotic zone, and thus the effectiveness of the âbiological pumpâ. |
| URL: | http://www.osti.gov/scitech/servlets/purl/1120791
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| Citation statistics: |
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| 资源类型: | 研究报告
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/41605
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| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
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| 1120791.pdf（74KB） | 研究报告 | -- | 开放获取 | | View
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| Recommended Citation: | |
Paytan, Adina. Organic Matter Composition, Recycling Susceptibility, and the Effectiveness of the Biological Pump â An Evaluation Using NMR Spectra of Marine Plankton. 2014-01-01.
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