The Role of Organic Phosphorus in Nutrient Cycling, Early Diagenesis and Burial of Refractory Organic Matter

有机磷在养分循环、早期成岩作用和难熔有机物埋藏中的作用

• 批准号: 9216553
• 负责人: Kathleen Ruttenberg
• 金额: $ 19.78万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-05-01 至 1996-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9216553&HistoricalAwards=false
• 关键词: Role; Organic; Phosphorus; Nutrient; Cycling

This project is designed to redress the scarcity of information on the composition, structure and cycling of compounds of marine sedimentary organic-P. Standard methods for isolating soluble organic-P are being coupled with analytical pyrolysis of the insoluble macromolecular fraction of organic-P, chromatographic (HPLC, GC) and direct spectroscopic (31P-NMR,MS) methods to characterize organic-P compounds in marine pore waters and sediments. Chemical structure and composition dictate whether organic-P compounds are labile or refractory with respect to microbially mediated degradation, and control recycling of sedimentary organic-P into the water column. Composition and chemical structure will therefore, in large part, control the ultimate burial rate of refractory organic-P. Construction of a material balance for the sedimentary organic-P reservoir based on detailed compositional/structural information of constituent organic-P compounds will permit documentation of the remineralization of the labile versus the refractory organic-P reservoirs.

该项目旨在解决以下方面信息缺乏的问题： 海洋生物化合物的组成、结构和循环 沉积有机物P.可溶性分离的标准方法 有机-P正在与分析热解的 有机磷的不溶性大分子级分，色谱法 (HPLC，GC）和直接光谱（31 P-NMR，MS）方法来测定 表征海洋孔隙沃茨中的有机磷化合物， 沉积物 化学结构和组成决定了 有机-P化合物对于以下是不稳定的或难处理的： 微生物介导的降解，并控制回收 沉积有机磷进入水体。 组成和 因此，化学结构将在很大程度上控制 难降解有机物的最终埋藏速率-P. 沉积有机磷储层的物质平衡， 组分的详细组成/结构信息 有机磷化合物将允许文件的 不稳定有机磷与难治有机磷的生物转化 水库