Organic Matter Composition, Recycling Susceptibility, and the Effectiveness of the Biological Pump â An Evaluation Using NMR Spectra of Marine Plankton

doi:10.2172/1120791

GSTDTAP > 地球科学

DOI	10.2172/1120791
来源ID	OSTI ID: 1120791
	Organic Matter Composition, Recycling Susceptibility, and the Effectiveness of the Biological Pump â An Evaluation Using NMR Spectra of Marine Plankton
	Paytan, Adina
	2014-02-19
出版年	2014
页数	3
语种	英语
国家	美国
领域	地球科学
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.
英文关键词	Oceanography Nutrients
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来源平台	US Department of Energy (DOE)
引用统计
文献类型	科技报告
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/6647
专题	地球科学
推荐引用方式 GB/T 7714	Paytan, Adina. Organic Matter Composition, Recycling Susceptibility, and the Effectiveness of the Biological Pump â An Evaluation Using NMR Spectra of Marine Plankton,2014.