University of California

What you'll study

This PhD is organised around independent, faculty-supervised research supported by a tailored programme of coursework and professional development. Core themes include evolutionary theory, population genetics, phylogenetics and systematics, community and ecosystem ecology, life-history evolution, behavioural ecology, and conservation biology. Students typically combine fieldwork, laboratory experiments, comparative analyses and quantitative modelling, and are expected to become proficient in statistical methods, programming for ecological and evolutionary analyses, and the use of modern molecular tools.

• Research project: The central component is an original dissertation project developed with one or more faculty advisers. Projects span topics such as speciation, adaptive evolution, population dynamics, invasive species, host–parasite coevolution, and biodiversity responses to environmental change.
• Methodological training: Courses and workshops cover population genetics and genomics, phylogenetic methods, ecological statistics (including Bayesian and hierarchical models), spatial ecology and remote sensing, and laboratory techniques for molecular ecology.
• Seminars and journal clubs: Regular seminars expose students to current literature and external speakers; students present research progress and lead discussion groups.
• Teaching and professional skills: Doctoral students gain teaching experience through assistantships, and receive training in grant writing, science communication, data management, ethical research practice and mentoring.
• Qualifying milestones: The programme typically includes a qualifying examination and an oral dissertation defence, with progression milestones that ensure readiness for independent research and publication.

Entry requirements

Applicants are expected to hold a bachelor’s degree in biology, ecology, evolution, mathematics, statistics, environmental science or a closely related field; many successful applicants also hold a relevant master’s degree. Strong preparation includes coursework in evolution, ecology, genetics, statistics and mathematics, together with demonstrated research experience (published papers, theses or substantial research projects).

• Academic record: A strong undergraduate and, where applicable, postgraduate transcript with evidence of quantitative and biological coursework.
• Research experience: Prior laboratory or field research is essential; applicants should describe specific roles, techniques used and outcomes in the statement of purpose.
• References: Two or three academic references who can assess research potential and readiness for doctoral work.
• Application materials: A statement of research interests, CV, transcripts and writing samples or publications are typically required. Standardised tests (where required) and language proficiency evidence must meet the University of California’s admissions policies.
• Fit with faculty: Successful applicants usually identify potential advisers whose expertise matches their research interests; contacting faculty in advance is recommended but not always required.

Career prospects

Graduates of this PhD programme pursue a wide range of careers that make direct use of their research, analytical and teaching skills. Many follow academic careers as postdoctoral researchers and faculty in ecology, evolutionary biology, systematics and related fields. Others move into research roles in government agencies (wildlife and fisheries services, environmental protection, natural resource management), non-governmental conservation organisations, environmental consultancies, and museums or botanical gardens.

• Research and academia: University faculty, postdoctoral researcher, research scientist positions.
• Conservation and policy: Conservation scientist, population biologist for NGOs, science adviser in policy units, natural resource manager.
• Government and applied science: Ecologist or geneticist in regulatory and management agencies, biodiversity monitoring and restoration roles.
• Industry and data science: Bioinformatics and genomics roles, environmental consulting, ecological forecasting, quantitative ecology roles in private sector and start-ups.
• Public engagement and curation: Science communication, museum or herbarium curator, outreach and education roles.

Why study at University of California

The University of California system offers access to a broad network of research-active faculty, interdisciplinary centres and a diversity of ecosystems across the state that support field-based and laboratory research. Students benefit from well-resourced laboratories, core facilities for genomics and imaging, and institutional links with natural reserves, museums and government agencies.

• Research breadth and collaboration: The UC system fosters collaborations across ecology, evolution, genomics, statistics and environmental science, enabling cross-disciplinary projects and access to specialised expertise.
• Facilities and field networks: Access to ecological field stations, long-term study sites and modern molecular and computational facilities supports ambitious empirical and theoretical research.
• Professional development: Structured support for teaching experience, grant-writing, data stewardship and career preparation prepares graduates for diverse career paths.
• Community and impact: A large, active community of researchers and alumni working in conservation, government and industry offers substantial networking and career opportunities.