Sources of Enrichment of Dissolved Free and Combined Amino Acids in the Sea Surface Microlayer

海表微层中溶解的游离氨基酸和结合氨基酸的富集来源

• 批准号: 0117208
• 负责人: Cindy Lee
• 金额: $ 30.02万
• 依托单位: SUNY at Stony Brook
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-10-01 至 2005-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0117208&HistoricalAwards=false
• 关键词: Sources; Enrichment; Dissolved; Free; Combined

ABSTRACTOCE-0117208In this study, researchers at the State University of New York at Stony Brook will attempt to identify and describe the various processes that lead to the enrichment of dissolved organic matter in the sea-surface microlayer. The sea-surface microlayer plays a major role in the exchange of matter and energy in the ocean-atmosphere system. Organic matter enriches the surface microlayer and influences its chemical, biological, and physical characteristics. Different constituents concentrate in the microlayer non-uniformly; consequently, the ratios of many dissolved elements and organic compounds therein differ from those in bulk water. These studies will focus on the transfer of dissolved free and combined amino acids between particulate and dissolved pools under the unique conditions of the interfacial laminar layer. A number of factors will be considered: increased physical stress on the biological community at the sea surface (e.g., by UV-radiation, evaporation, entrapment in spray), which causes leaching of organic matter from the resulting dead or injured organisms; dissolved organic matter decomposition by metabolically active neuston (hydrolysis, oxidation, and uptake); adsorption of dissolved matter onto particles which in the microlayer; and bubble scavenging from bulk water to the surface microlayer of proteinaceous matter that is dissolved or weakly associated with particles.

在这项研究中，纽约州立大学石溪分校的研究人员将试图识别和描述导致海面微层中溶解有机物浓缩的各种过程。海面微层在海洋-大气系统的物质和能量交换中起着重要作用。有机质丰富了表面微层，并影响其化学、生物和物理特性。不同的组分不均匀地集中在微层中，因此，许多溶解元素和有机化合物的比例与散体水中的不同。这些研究将侧重于在界面层的独特条件下，溶解的游离氨基酸和结合氨基酸在颗粒池和溶池之间的转移。将考虑一些因素：海面生物群落的实际压力增加(如紫外线辐射、蒸发、被困在喷雾中)，造成死亡或受伤生物体的有机物质淋溶；新陈代谢活性的Neuston分解溶解的有机物(水解、氧化和吸收)；溶解的物质在微粒上的吸附；溶解物质从散装水到表层微层的气泡；溶解或与颗粒弱结合的蛋白质物质的气泡。