The Role of Benthic Organisms in the Degradation and Preservation of Planktonic Lipids in Coastal Sediments

底栖生物在沿海沉积物中浮游脂质的降解和保存中的作用

• 批准号: 9503760
• 负责人: Ming-Yi Sun
• 金额: $ 29.57万
• 依托单位: SUNY at Stony Brook
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-05-15 至 1996-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9503760&HistoricalAwards=false
• 关键词: Role; Benthic; Organisms; Degradation; Preservation

9503760 SUN Degradation rate constants for several planktonic lipid compound will be investigated under controlled laboratory conditions. Activity of benthic animals was the most likely factor causing the difference observed between rate constants in oxic and anoxic sediments profiles measured in the field. Animals can alter oxic/anoxic boundaries, control material transport processes, directly or indirectly affect microbial populations, and directly consume organic detritus. Differences under oxic versus anoxic conditions in remineralization efficiency and formation of intermediate products show that degradation follows different pathways. Research will specially consider the effects on degradation and preservation of planktonic lipids of grazing, bioturbation and oscillation between oxic and anoxic conditions caused by benthic animals. Radiolabelled tracers degradation rates and pathways under various influences of benthic animals. Further intensive study of the structure of metabolites produced during incubation experiments will provide a more detailed picture of the degradation of these important compounds.

小行星9503760 将在受控实验室条件下研究几种浮游脂质化合物的降解速率常数。 底栖动物的活动是造成实地测量的好氧和缺氧沉积物剖面中观察到的速率常数之间差异的最可能因素。动物可以改变好氧/缺氧边界，控制物质运输过程，直接或间接影响微生物种群，并直接消耗有机碎屑。在好氧条件下与缺氧条件下的差异，在厌氧效率和形成的中间产品表明，降解遵循不同的途径。研究将特别考虑放牧、生物扰动和底栖动物造成的有氧和缺氧条件之间的波动对营养性脂质的降解和保存的影响。底栖动物不同影响下放射性示踪剂的降解速率和途径。进一步深入研究孵育实验期间产生的代谢物的结构，将提供这些重要化合物降解的更详细的情况。