Dynamics and Energetics of Nitrogen Uptake by Marine Bacteria in Continuous Culture

这是对伍兹霍尔海洋研究所戈德曼博士的两年持续资助。这一新奖项将支持他关于海洋细菌在表层海洋氮循环中的作用的研究。在这项实验室研究中，选定的细菌将在不同氮素营养条件下的恒化器中生长。通过改变基质的碳氮组成，确定氨基酸、氨氮、硝酸盐和尿素对细菌组成、生长效率和氮素再生的影响。尽管氮的有效性似乎控制着表层海水的生物生产力，但这种限制营养物质持续提供给植物生长(再生)的机制尚不清楚。这是得到支持的研究之一，将有助于更清楚地了解微生物环路及其在海洋生产力中的作用。

This is a two year continuing grant to Dr. Goldman of the Woods Hole Oceanographic Institute. This new award will support his studies on the the role of marine bacteria in the surface ocean nitrogen cycle. In this laboratory study, selected bacteria will be grown in chemostats under varying nitrogenous nutrient regimes. The carbon : nitrogen compostition of the substrate will be varied to ascertain the effect on bacterial composition, growth efficiency and nitrogen regeneration using amino acids, ammonium, nitrate and urea. Although it appears that nitrogen availability controls the biological productivity of surface ocean water, the mechanisms by which this limiting nutrient is continually made available for plant growth (regenerated) remain unclear. This is one of the supported studies that will contribute to a clearer understanding of the microbial loop and its role in ocean productivity.