Life’s a Beach - Tropical Beach Microbiomes in a Changing World

About the project

About the Project Tropical beaches are among the world’s most heavily used and impacted coastal environments and underpin a major tourism industry across Southeast Asia. Despite their ecological and economic importance, their microbial biodiversity and ecosystem functions remain poorly understood compared with other coastal habitats such as mangroves, salt marshes, and rocky shores. This project aims to address that knowledge gap through an ambitious regional study of tropical beach sand microbiomes across contrasting environmental settings. This PhD project will examine how microbial communities in tropical sandy shorelines vary across seasons, sediment types, and gradients of human impact. The work will seek to define the structure and functional potential of healthy tropical beach microbiomes and evaluate their contribution to coastal carbon cycling relative to other coastal habitats. The project will also investigate how anthropogenic pressures influence microbial community structure and ecosystem functionality, with a particular focus on the impacts of tourism-related activities on beach ecosystem health. Finally, the study will explore how simulated climate change scenarios may alter microbial community resilience and ecosystem processes in tropical sandy beaches. The project combines field-based coastal science with modern environmental microbiology and data-driven ecological analysis. Research activities will include extensive field sampling in Singapore and selected coastal sites in Thailand and Malaysia, providing opportunities for regional collaboration and international field experience. The student will work within an interdisciplinary research environment focused on marine sustainability, environmental biotechnology, and microbial ecology. This PhD offers an opportunity to contribute to globally important questions surrounding coastal ecosystem health and climate resilience in rapidly developing tropical regions. The findings are expected to advance scientific understanding of sandy beach ecosystems while also informing future approaches to coastal management, pollution monitoring, and environmental conservation in Southeast Asia. Criteria All applicants must possess at least four years of undergraduate study or three years of undergraduate study with a Masters degree. For Research Scholarships, candidates must have obtained a Bachelor’s degree with at least 2nd Class Upper Honours, or its equivalent. We consider an applicant's Grade Point Average (GPA) an important factor in assessing their suitability. As the medium of instruction at NUS is in English, applicants whose native tongue or medium of undergraduate instruction is not English, should submit TOEFL/IELTS (Academic Test) scores as evidence of their proficiency in the English Language. The minimum TOEFL score is 580 (Paper-based Test), 260 (Computer-based Test) and 85 (Internet-based Test). The minimum IELTS score is 6. Candidates are strongly encouraged to submit GRE (minimum score of 320 [Verbal+ Quantitative] and 3.5 [Analytical Writing]). You may apply via Graduate Admission Systems (GDA3) at https://gradapp.nus.edu.sg/apply . The next intake is for August 2027. Please apply from 16 May 2026 onwards. Please submit the required documents (transcript, TOEFL) via online before 15 November 2026 ((based on Singapore Time (SGT), UTC +8)). We highly encourage you to submit the required documents preferably before the end of October 2026. This will allow us to evaluate your dossier in advance and ensure a smoother process moving forward. Kindly prepare the following documents/item to upload in the application system: Singapore NRIC (for Singapore Citizens or Singapore PRs); Passport information page (for International applicants) Certified true copy of official Bachelor’s or Master’s transcript (with the grading scale provided) Certified true copy of official Bachelor’s or Master’s Degree certificate Other academic certificates (if applicable) Valid TOEFL/IELTS score Applicants whose native tongue and medium of university instruction is not completely in English should upload the official score sheet of TOEFL (≥85) or IELTS (≥ 6.0) as evidence of their proficiency in the English language. TOEFL/ IELTS scores are valid for 2 years from the test date and should not have expired at point of application. Expired scores will not be considered for the application. A certified copy of GRE (Candidates are strongly encouraged to submit GRE) Two academic referee reports CV A summary of your education, work experience, co-curricular activities, community service, etc. Personal Statement of around 2 pages. You may include your broad research interests, previous research accomplishments and personal vision of future career. Financial Statement or Sponsorship Letter (if you have opted for ‘Self-Finance’ at point of application) List of publication details: The number of papers you have published, Whether you are the first author or a co-author for each of your publications, Whether the journals are local, regional or international Passport size photograph following the specifications listed here Information on scholarships and financial aid is available at: https://nusgs.nus.edu.sg/scholarships/ https://nusgs.nus.edu.sg/financial-aid/ Go to 'Staffs', then ‘Faculty by Research” and you will be able to see the research areas of our academic staff. http://www.dbs.nus.edu.sg Tuition Fee: https://www.nus.edu.sg/registrar/administrative-policies-procedures/graduate/graduate-fees Department Code for GRE: https://www.science.nus.edu.sg/admissions/graduates/research-programmes/frequently-asked-questions/

Research areas