School of Science Department of Ocean Science 65 Characterising Coral Reef Function across Anthropogenic Gradients Supervisor: WYATT Alex / OCES Student: NANDI Shrinivas / ENVS Course: UROP2100, Spring UROP1000, Summer Coral reefs are facing a grave future as they are exposed to severe environmental stresses due to increasing anthropogenic activities. The rising ocean temperatures every summer has resulted in more frequent and deadly bleaching episodes around the globe. It is a necessity for scientists to utilize regular monitoring techniques to identify early signs of coral bleaching. In this report, we utilize coral colour reference cards, SCUBA, and Symbiodinium cell counting to establish a baseline for bleaching of corals at Sharp Island in Hong Kong. Characterising Coral Reef Function across Anthropogenic Gradients Supervisor: WYATT Alex / OCES Student: CHEUNG Chun Fei / SSCI Course: UROP1100, Summer Coral reefs support many marine organisms and provide ecological services. Through stable isotope analysis of different samples (including sediments, deposit feeders like sea cucumber, filter feeders like bivalves, etc.) from different field sites, the marine food web of Hong Kong can be constructed, and anthropogenic impacts across the East-West gradient could be investigated. Stable isotope analysis can be used to reveal the diet, trophic level and geographic location of samples. However, there are both advantages and limitations. Below the procedures carried out in the project will be discussed. Moreover, the basic principle of stable isotope analysis as a tool in ecological research will be included.