Phytoplankton primary production (PhytoPP) underpins the marine foodweb and is a key component of the oceanic carbon cycle. This project will investigate the variable coupling of photosynthetic electron transport estimated using active chlorophyll fluorescence techniques, 碳固定, 以便于对后者进行宽时空尺度的自主测量.
Measurement of PhytoPP has enormous potential for developing our understanding of ocean productivity and validation of biogeochemical models. 从历史上看, direct measurement of PhytoPP has been dominated by incubation-based measurement of 14C assimilation over several hours. 然而, 由于该方法不能直接应用于有意义的空间和时间尺度, 海洋生产力的采样严重不足.
长期合作 切尔西科技有限公司 and the 十大靠谱网投平台 has led to the development of a new generation of Single Turnover Active chlorophyll Fluorometer (STAF) systems for the assessment of photosynthetic electron transport. 然而 the coupling of electron transport to carbon fixation is variable as a result of multiple physiological, 生态和相关环境驱动因素.
This PhD project aims to undertake a comprehensive assessment of the potential for STAF to accurately estimate carbon fixation and investigate drivers of variability in electron to carbon coupling. 测量浮游植物培养在实验室规定的条件下, 包括光线和营养的变化, 是否会与野外自然浮游植物群落的类似测量相结合, 包括在南大洋出海的机会.
You will be trained in the use of active chlorophyll fluorometry for the assessment of phytoplankton physiology and electron transport, 以及使用放射性示踪技术进行微生物率测量. 另外, 你将接受多变量数据分析技术的培训, supporting the development of a mechanistic understanding of variability in electron transport coupling to carbon fixation in the oceans.