Phosphorus Regeneration in the Ocean ? An Evaluation Using P and C NMR and Sequential Leaching of Marine Particulate Matter

海洋中磷的再生？

• 批准号: 0352756
• 负责人: Adina Paytan
• 金额: $ 6.31万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-09-01 至 2005-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0352756&HistoricalAwards=false
• 关键词: Phosphorus; Regeneration; Ocean; Evaluation; Using

ABSTRACTOCE-0352756An investigator from Stanford University proposes to utilize fresh suspended matter samples recovered from sediment traps in September 2003 at two sites in Monterey Bay (S2-300m and 1200m; S3-300m and 2400m) to study the composition of particulate organic carbon (POC) and particulate organic phosphorus (POP) using 13C and 31P-NMR (nuclear magnetic resonance) spectra. The investigator also plans to determine the P content in different operationally defined fractions (e.g., exchangeable P, Fe-bound P, apatite, carbonate bound P, detrital/inorganic P and organic P) of the suspended matter samples using SEDEX sequential leaching. The goals of the study are to evaluate the utility of NRM spectra to determine the composition of particulate organic matter (POM) in sediment traps, as well as investigate the seasonal and depth variability of the molecular composition of POM and P associations. Results from the project will be related to the availability and regeneration rates of P, as well as biological productivity and ecosystem structure in the water column.

美国斯坦福大学研究人员拟利用2003年9月在蒙特雷湾（Monterey Bay）两个地点（S2-300m和1200m； S2-300m和2400m）从沉积物捕集器中回收的新鲜悬浮物样品，利用13C和31P-NMR（核磁共振）谱研究颗粒有机碳（POC）和颗粒有机磷（POP）的组成。研究人员还计划使用SEDEX顺序浸出法测定悬浮物样品中不同操作定义组分（例如，交换性磷、铁结合磷、磷灰石、碳酸盐结合磷、碎屑/无机磷和有机磷）中的磷含量。该研究的目的是评估NRM光谱在确定沉积物陷阱中颗粒物有机物质（POM）组成方面的效用，并研究POM和P相关分子组成的季节和深度变化。该项目的结果将与水柱中磷的有效性和再生率以及生物生产力和生态系统结构有关。