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.

摘要-0117208在这项研究中，斯托尼布鲁克的纽约州立大学的研究人员将试图识别和描述导致海洋表面微层中溶解有机物富集的各种过程。海表微层在海洋-大气系统的物质和能量交换中起着重要作用。 有机物丰富了表面微层，并影响其化学，生物和物理特性。 不同的成分集中在微层不均匀，因此，许多溶解的元素和有机化合物的比例，其中不同于散装水。 这些研究将侧重于在界面层流层的独特条件下，颗粒和溶解池之间溶解的游离氨基酸和结合氨基酸的转移。 将考虑若干因素：对海面生物群落的物理压力增加（例如，通过紫外线辐射、蒸发、喷雾截留），导致有机物从死亡或受伤的生物体中沥滤;溶解的有机物被代谢活性浮游生物分解（水解、氧化和吸收）;溶解物质吸附到微层中的颗粒上;以及气泡从本体水清除到溶解的或与颗粒弱结合的蛋白质物质的表面微层。