An experienced marine biologist with a BSc (Hons) degree in Marine Biology, and an MSc in marine resource development and protection.  My current position at Swansea University involves a technical research role working on an EU funded research project (SEACAMS2), and part-time PhD studying environmental drivers of change in seagrass meadows. Over the past 6 years I have gained experience working on a range of projects from marine mammal acoustic monitoring to fish, seagrass and benthic surveys around Wales and UK using a variety of methods.

I also have experience in environmental education having worked at Orielton Field Centre, Field Studies Council, and Academic Treks, teaching marine ecology, and tropical marine biology courses. I currently assist with the Marine biology field course BIO260.

Areas of Expertise

  • Seagrass ecology
  • Benthic survey
  • Benthic taxonomy
  • Rocky shore ecology
  • Fish biology
  • Marine mammal acoustic survey


  1. Bertelli, C., Unsworth, R. Light Stress Responses by the Eelgrass, Zostera marina (L) Frontiers in Environmental Science 6
  2. Bertelli, C., Unsworth, R. Protecting the hand that feeds us: Seagrass (Zostera marina) serves as commercial juvenile fish habitat Marine Pollution Bulletin
  3. Callaway, R., Grenfell, S., Bertelli, C., Mendzil, A., Moore, J. Size, distribution and sediment biodeposition of prolific bivalves in small estuaries Estuarine, Coastal and Shelf Science
  4. Grenfell, S., Callaway, R., Grenfell, M., Bertelli, C., Mendzil, A., Tew, I., Callaway, R., Bertelli, C., Mendzil, A. Will a rising sea sink some estuarine wetland ecosystems? Science of The Total Environment 554-555 276 292
  5. Bertelli, C., Robinson, M., Mendzil, A., Pratt, L., Unsworth, R. Finding some seagrass optimism in Wales, the case of Zostera noltii Marine Pollution Bulletin


  • BIO260 Marine Biology Field Course

    This residential field course comprises practical work employing shore-based techniques to sample littoral and benthic marine habitats. Students will learn techniques for the identification of marine organisms and gain experience in the analysis and presentation of ecological data.

  • BIO327 Tropical marine ecology field course

    This field based module will provide students with an introduction to the ecology of tropical marine systems and teach students the key practical skills required by tropical marine biologists. Students will obtain training in how to design, implement and report scientifically robust marine research. The module will complement the level three marine field course and help develop key skills in field based marine biology. Students will learn skills in marine ecology and taxonomy, in-water marine sampling and surveys, and impact assessment. This module will be mostly practical based but will also include theory lectures, workshops and feedback sessions. It would be structured around seven days of directed practical activities and a three day small group based mini-project. The field course will utilise snorkeling and intertidal walking as the major means of sampling throughout directed practical¿s.

  • BIO346 Professional Skills in Marine Biology

    This field-based module will introduce students to the professional techniques utilised to monitor and study marine life in a variety of marine and coastal habitats and in relation to conservation management and biodiversity monitoring in the United Kingdom. The course places a strong emphasis on marine ecological census techniques. Students will learn key skills relevant to the marine ecology sector including protected and economically-important species (especially marine mammals, fish, shellfish, coastal birds), Phase 1 habitat surveys and water quality surveys. Students will also learn about the biotic and abiotic factors that define different UK habitats and relevant regulations that protect them. The module provides an introduction to the Environmental Impact Assessment (EIA) process and a range of impacts on the marine environment including energy generation and pollution. Participants in this module will work in groups acting as a marine environmental consultancy and the class will be responsible for producing key survey results for an Environmental Impact Assessment (EIA) and public engagement presentation for a proposed commercial development in Carmarthen Bay. Students will gain insider experience about professional techniques in marine (and freshwater) biology through a series of lectures delivered by marine environmental practitioners from environmental consultancies and regulatory organisations in the UK. The course includes a five-day residential field course in September/October which provides the students with the opportunity to practice the key technical skills in a real-world setting