REU: The Kinetics of Organic Matter Diagenesis: Control byBiomass Dynamics or Polymer Lability

REU：有机质成岩动力学：由生物质动力学或聚合物不稳定性控制

• 批准号: 8912433
• 负责人: Lawrence Mayer
• 金额: $ 12.49万
• 依托单位: University of Maine
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-09-01 至 1991-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8912433&HistoricalAwards=false
• 关键词: REU; Kinetics; Organic; Matter; Diagenesis

Although microorganisms have often been considered the catalysts of organic matter mineralization in sediments, little consideration has been given to the relative significance of microbial biomass, either from a static or dynamic perspective. In fact, microbial biomass is regarded as a negligible or inconsequential component of total sediment organic matter. This view has not been substantiated and may well be incorrect. Several lines of experimental evidence suggest that biomass may have been previously underestimated, that biomass and biosynthesis may be significant compared to annual organic inputs, and that to a large extent, sedimentary organic matter may be an intermediate or endproduct of biomass formed during the mineralization of inputs from phytoplanktonic or other sources. This view is substantially different from accepted dogma which treats mineralization solely as a function of the lability of different fractions of a the original algal detritus inputs. This lability hypothesis will be tested by determining 1) the kinetics of downcore mineralization and 2) the extent of organic burial or preservation.

尽管微生物通常被认为是沉积物中有机物矿化的催化剂，但从静态或动态的角度来看，微生物生物量的相对重要性几乎没有考虑。 实际上，微生物生物量被认为是总沉积物有机物的微不足道或无关紧要的成分。 这种观点尚未得到证实，可能是不正确的。 几条实验证据表明，生物量可能先前被低估了，与年度有机输入相比，生物量和生物合成可能是显着的，并且在很大程度上，沉积有机物可能是从植物植物矿物质或其他源矿化矿物矿化过程中形成的中间或最终生物量的中间或最终产物。 这种观点与接受的教条大不相同，该教条仅作为原始藻类碎屑输入的不同分数的不稳定的函数。 该假设将通过确定1）下层矿化的动力学以及2）有机埋葬或保存的程度来检验。