School of Science Department of Ocean Science 57 Department of Ocean Science Biogeochemistry of Wetlands and Coastal Seas in Hong Kong Supervisor: LI Jiying / OCES Student: KAN Man Hei / OST Course: UROP 1000, Summer Phosphorus is an essential nutrient that supports all living things and is a big component of structural and genetic materials. In Mai Po Nature Reserve, it is more crucial to understand how phosphorus is distributed vertically in the area as it collects nutrient-rich runoffs from the adjacent Pearl River Estuary as to better understand its nutrient demands. In the following report, the methodology for extracting solid phosphorus in a fractionated manner is discussed in detail. Next, there will be a brief discussion of the results focusing on the fraction of total solid phosphorus, iron-bound phosphorus, and the effect the iron reduction process has on the phosphorus speciation with the support of graphs. Biogeochemistry of Wetlands and Coastal Seas in Hong Kong Supervisor: LI Jiying / OCES Student: WONG Ching Yee / BIOT Course: UROP 1000, Summer This report consists of the details of the experiments conducted in the Summer UROP1000 project, “Biochemistry of Wetlands and Coastal Seas in Hong Kong”: Variations of iron compounds are found throughout marine sediment and are linked to how carbon is preserved in sediment by carbon remineralization. Extracting and measuring via colorimetry the content of such iron compounds may lead to a better understanding of the phenomenon and highlight the differences of marine sediment in various locations throughout Hong Kong. The motivations of joining this project and reflection upon the completion of the course are also included, along with the expression of hopes for future personal development from experiences gained from the project. Study on the Adaptation and Physiological Responses of Synechococcus Isolates from Different Oceans Supervisor: LIU Hongbin / OCES Student: HUNG Man Ching / OST Course: UROP 1100, Fall Synechococcus are some of the most widespread photosynthetic organisms in the marine environment. These unicellular Picocyanobacteria contribute greatly to global marine primary production by striving in diverse environments through their multiple clades. Synechococcus distribution is greatly influenced by temperature, this infers that long-term thermal acclimation could significantly influence the growth rate of a strain. Better understanding of the effects of long-term thermal acclimation on the growth rate could offer insight to the effects of long-term thermal acclimation on Synechococcus. In this extended study, a strain of Synechococcus L11 is subject to long-term thermal acclimation at 23˚C and 31˚C to find out the effects of long-term thermal acclimation to growth rate. In addition to culturing different strains of Synechococcus to examine their growth and development in controlled conditions.
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