Postdoctoral scientist



Georgina Brennan

I am Marie Curie research fellow working on the ‘WildE’ research project. I am molecular ecologist and evolutionary biologist interested how environmental drivers shape populations at the phenotypic and molecular level. I received my PhD and the University of Edinburgh (Institute of Evolutionary Biology) in 2016 and I have since completed two postdoctoral positions. During my first postdoc at Bangor University, in collaboration with  PollerGEN, I used eDNA methods to measure the biodiversity and quantity of airborne pollen, with a special focus on grasses and allergy (2016 – 2019). I recently completed a short project at Lund University measuring the biodiversity of fish and invertebrates in streams in southern Sweden, using eDNA metabarcoding (2019 -2020).

I am now working at ICM-CSIC on the MSCA funded research ‘WildE’. This project uses molecular tools to directly measure the rate of microevolution of ecologically important marine microbes to explore how globally important microbes will respond to climate change.


Shifts in honeybee foraging reveal historical changes in floral resources (2021)

L. Jones, G.L. Brennan, A. Lowe, S. Creer, C.R. Ford, N. de Vere

Communications Biology, 4, 37. DOI:

Key questions for next-generation biomonitoring (2020)

A. Makiola, Z.G. Compson, D.J. Baird, M.A. Barnes, S.P. Boerlijst, A. Bouchez, G.L. Brennan et al.

Frontiers in Environmental Science, 7, 1-14. DOI:

Temperate airborne grass pollen defined by spatio-temporal shifts in community composition (2019)

G.L. Brennan, C. Potter, N. de Vere, G.W. Griffith, C.A. Skjøth, N.J. Osborne, B.W. Wheeler, R.N. McInnes, Y. Clewlow, A. Barber, H.M. Hanlon, M. Hegarty, L. Jones, A. Kurganskiy, F.M. Rowney, C Armitage, B. Adams-Groom, C.R. Ford, G.M. Petch, The PollerGEN Consortium, and S. Creer.

Nature Ecology and Evolution, 3, 750–754, DOI:  

The intrinsic predictability of ecological time series and its potential to guide forecasting (2019)

F. Pennekamp, A. Iles, J. Garland, G. Brennan, U. Brose, U. Gaedke, U. Jacob, P. Kratina, B. Matthews, S. Munch, M. Novak, G.M. Palamara, B. Rall, B. Rosenbaum, A. Tabi, C. Ward, R. Williams, H. Ye, O. Petchey

Ecological Monographs, 89(2), DOI:  

Ocean acidification increases iodine accumulation in kelp-based coastal food webs (2018)

D. Xu*, G. Brennan*, L. Xu, X.W. Zhang, X. Fan, W.T. Han, T. Mock, A. McMinn, D.A. Hutchins, N. Ye (* These authors contributed equally)

Global Change Biology, 25, 629-639. DOI: 10.1111/gcb.14467


Evolutionary consequences of multidriver environmental change in an aquatic primary producer (2017)

G. Brennan, N. Colegrave, S. Collins

Proceedings of the National Academy of Sciences of the United States of America, 114(37), 9930-9935. DOI:

Growth responses of a green alga to multiple environmental drivers (2015)

G. Brennan, S. Collins

Nature Climate Change, 5, 892–897. DOI:

Understanding macroalgal dispersal in a complex hydrodynamic environment: a combined population genetic and physical modelling approach (2014)

G. Brennan, L. Kregting, G.E. Beatty, C. Cole, B. Elsäßer, G. Savidge, G., Provan

Journal of the Royal Society, Interface / the Royal Society, 11(95), 20140197. DOI:


PollerGEN: Linking grass pollen biodiversity and human health: an environmental genomics approach. Funding entity: Natural Environment Research Council (NERC) Start: 01/03/2016 End: 31/08/2019


Exploring the persistence of fish eDNA using a mesocosm approach (MsC Thesis). Distinction

Author: Theophine Ottosson

Supervisor: Georgina Brennan

Institution: Lund University, Sweden

Year: 2021


Aerobiological Sampling for DNA Sequencing: using the MinION to Identify Distinct Species of Allergenic Tree Pollen (MsC Thesis)

Author: Anna Egerton

Supervisor: Georgina Brennan

Institution: Bangor University, UK

Year: 2020