Carl Sayer is an aquatic ecologist with interests in the chemistry, ecology, palaeoecology and the management of shallow lakes and ponds. He has specialist expertise in the study and identification of aquatic macrophytes, diatoms and fishes. He is interested particularly in lake, pond and river restoration. He has published extensively on shallow lake ecology and he is an enthusiastic communicator of his work to landowners, farmers and the general public.

Current Position

Research Consultant (ENSIS Ltd), Senior Lecturer (UCL)

Professional Affiliations

  • Member of Norfolk Biodiversity Partnership
  • Secretary of the London Freshwater Group
  • Member of the Wild Trout Trust
  • Founder and Committee member of the River Glaven Conservation Group
  • Member of the Freshwater Biological Association
  • Member of the Norfolk Wildlife Trust
  • Member of the Freshwater Biological Association Meetings Committee
  • Member of the UK and Ireland Lakes Network
  • Advisor to the Broads Authority on lake restoration
  • Advisor to the National Trust on freshwater conservation and restoration

Selected Publications

Sayer, C.D., Andrews K., Shilland E., Axmacher, J.A., Edmonds-Brown, R., Edmonds, N., Patmore, I. & Emson, D. (in press) The role of pond management for biodiversity conservation in an agricultural landscape. Aquatic Conservation: Marine and Freshwater Ecosystems.

Sayer, C.D., Bennion, H., Davidson, T.A., Burgess, A., Clarke, G., Hoare, D., Frings, P & Hatton-Ellis, T. (2012) The application of palaeolimnology to evidence-based lake management and conservation: examples from UK lakes. Aquatic Conservation: Marine and Freshwater Ecosystems 22, 165–180.

Almeida, D., Copp G., Masson, L., Miranda, R., Murai, M. & Sayer, C.D. (2012) Changes in the diet of a recovering Eurasian otter population between the mid-1970s and 2010. Aquatic Conservation: Marine and Freshwater Ecosystems 22, 26–35.

Sayer, C.D., Copp, G.H., Emson, D., Godard, M.J., Zięba, G. & Wesley K.J. (2011) Towards the conservation of crucian carp Carassius carassius: understanding the extent and causes of decline within part of its native English range. Journal of Fish Biology 79, 1608–1624.

Madgwick, G., Emson D., Sayer, C.D., Willby N.J., Rose N., Jackson M.J. & Kelly A. (2011) Centennial-scale changes to the aquatic vegetation structure of a shallow eutrophic lake and implications for restoration. Freshwater Biology 56, 2620–2636.

Holmes J., Sayer, C.D., Liptrott E., & Hoare D.J. (2010) Complex controls on ostracod faunal palaeoecology in a shallow, coastal brackish-water lake: implications for palaeosalinity reconstruction. Freshwater Biology 55, 2484–2498.

Salgado, J., Sayer C.D., Carvalho, L., Davidson, T.A. & Gunn, I. (2010) Assessing aquatic macrophyte community change through the integration of palaeolimnological and historical data at Loch Leven, Scotland. Journal of Paleolimnology 43, 191–204.

Sayer, C.D., Burgess, A., Kari, K., Peglar, S., Davidson, T.A., Yang, H. & Rose, N. (2010) Long-term dynamics of submerged macrophytes and algae in a small and shallow, eutrophic lake: implications for the stability of macrophyte-dominance. Freshwater Biology 55, 565–583.

Sayer, C.D., Davidson, T.A., Jones, I.J. & Langdon, P.G. (2010) Combining contemporary ecology and palaeolimnology to understand shallow lake ecosystem change. Freshwater Biology 55, 487–499.

Sayer, C.D., Davidson, T.A. & Jones, J.I. (2010) Seasonal dynamics of macrophytes and phytoplankton in shallow lakes: a eutrophication-driven pathway from plants to plankton. Freshwater Biology 55, 500–513.