Hanna Farnelid

I’m an associate professor in marine ecology. I have a PhD in microbiology and an engineering degree from Chalmers University of Technology in Biotechnology. I study phytoplankton and bacteria with a focus on microbial diversity, distribution and functionality. In my research I use traditional microbial methods in combination with in situ studies and molecular methods. I am particularly interested in genetic microdiversity within microbial lineages and their consequences for ecosystem functioning.

Teaching

I teach in a number of microbiology and marine ecology courses within the BSc program in biology and the MSc program in aquatic ecology. I supervise first, second, and third level thesis students.

Research

My research interests are within aquatic microbial ecology with a focus on microbial diversity and functionality. I study phytoplankton and bacteria interactions with a focus on processes such as carbon and nitrogen fixation. My current research is focusing on microdiversity and econiches of Synechococcus sublineages.

Commissions

Swedish Institute for the Marine Environment (Environmental analyst 10%)

Research group and projects

My research group is a part of

Linnaeus University Centre for Ecology and Evolution in Microbial model Systems The research that is carried out at the Linnaeus University Centre for Ecology and Evolution in Microbial model Systems…

Publications

Article in journal (Refereed)

Gradoville, M.R., Farnelid, H., White, A.E., Turk-Kubo, K.A., Stewart, B., et al. (2020). Latitudinal constraints on the abundance and activity of the cyanobacterium UCYN-A and other marine diazotrophs in the North Pacific. Limnology and Oceanography. 65. 1858-1875.
Farnelid, H., Turk-Kubo, K., Zehr, J.P. (2020). Cell sorting reveals few novel prokaryote and photosynthetic picoeukaryote associations in the oligotrophic ocean. Environmental Microbiology. 1-12.
Sörenson, E., Farnelid, H., Lindehoff, E., Legrand, C. (2020). Resource Partitioning Between Phytoplankton and Bacteria in the Coastal Baltic Sea. Frontiers in Marine Science. 7. 1-19.
Del Carmen Munoz-Marin, M., Shilova, I.N., Shi, T., Farnelid, H., Maria Cabello, A., et al. (2019). The Transcriptional Cycle Is Suited to Daytime N₂ Fixation in the Unicellular Cyanobacterium “Candidatus Atelocyanobacterium thalassa” (UCYN-A). mBio. 10. 1-17.
Sörenson, E., Bertos-Fortis, M., Farnelid, H., Kremp, A., Kruget, K., et al. (2019). Consistency in microbiomes in cultures of Alexandrium species isolated from brackish and marine waters. Environmental Microbiology Reports. 11. 425-433.
Farnelid, H., Turk-Kubo, K., Ploug, H., Ossolinski, J.E., Collins, J.R., et al. (2019). Diverse diazotrophs are present on sinking particles in the North Pacific Subtropical Gyre. The ISME Journal. 13. 170-182.
Cornejo-Castillo, F.M., Del Carmen Munoz-Marin, M., Turk-Kubo, K.A., Royo-Llonch, M., Farnelid, H., et al. (2019). UCYN-A3, a newly characterized open ocean sublineage of the symbiotic N₂-fixing cyanobacterium Candidatus Atelocyanobacterium thalassa. Environmental Microbiology. 21. 111-124.
Turk-Kubo, K.A., Connell, P., Caron, D., Hogan, M.E., Farnelid, H., et al. (2018). In Situ Diazotroph Population Dynamics Under Different Resource Ratios in the North Pacific Subtropical Gyre. Frontiers in Microbiology. 9.
Turk-Kubo, K.A., Farnelid, H., Shilova, I.N., Henke, B., Zehr, J.P. (2017). Distinct ecological niches of marine symbiotic N₂-fixing cyanobacterium Candidatus Atelocyanobacterium thalassa sublineages. Journal of Phycology. 53. 451-461.
Zehr, J.P., Shilova, I.N., Farnelid, H., Muñoz-Marín, M.D.C., Turk-Kubo, K.A. (2017). Unusual marine unicellular symbiosis with the nitrogen-fixing cyanobacterium UCYN-A. Nature Microbiology. 2. 1-10.
Farnelid, H., Turk-Kubo, K.A., Zehr, J.P. (2016). Identification of Associations between Bacterioplankton and Photosynthetic Picoeukaryotes in Coastal Waters. Frontiers in Microbiology. 7.
Bertos-Fortis, M., Farnelid, H., Lindh, M.V., Casini, M., Andersson, A., et al. (2016). Unscrambling Cyanobacteria Community Dynamics Related to Environmental Factors. Frontiers in Microbiology. 7.
Bentzon-Tilia, M., Farnelid, H., Jürgens, K., Riemann, L. (2014). Cultivation and isolation of N2-fixing bacteria from suboxic waters in the Baltic Sea. FEMS Microbiology Ecology. 88. 358-371.
Farnelid, H., Harder, J., Bentzon-Tilia, M., Riemann, L. (2014). Isolation of heterotrophic diazotrophic bacteria from estuarine surface waters. Environmental Microbiology. 16. 3072-3082.
Farnelid, H., Bentzon-Tilia, M., Andersson, A.F., Bertilsson, S., Jost, G., et al. (2013). Active nitrogen-fixing heterotrophic bacteria at and below the chemocline of the central Baltic Sea. The ISME Journal. 7. 1413-1423.
Alonso-Saéz, L., Waller, A.S., Mende, D.R., Bakker, K., Farnelid, H., et al. (2012). Role for urea in nitrification by polar marine Archaea. Proceedings of the National Academy of Sciences of the United States of America. 109. 17989-17994.
Farnelid, H., Andersson, A.F., Bertilsson, S., Al-Soud, W.A., Hansen, L.H., et al. (2011). Nitrogenase gene amplicons from global marine surface waters are dominated by genes of non-cyanobacteria. PLoS ONE. 6. e19223.
Riemann, L., Farnelid, H., Steward, G.F. (2010). Nitrogenase genes in non-cyanobacterial plankton : prevalence, diversity and regulation in marine waters. Aquatic Microbial Ecology. 61. 225-237.
Farnelid, H., Tarangkoon, W., Hansen, G., Hansen, P.J., Riemann, L. (2010). Putative N-2-fixing heterotrophic bacteria associated with dinoflagellate-Cyanobacteria consortia in the low-nitrogen Indian Ocean. Aquatic Microbial Ecology. 61. 105-117.
Farnelid, H., Öberg, T., Riemann, L. (2009). Identity and dynamics of putative N-2-fixing picoplankton in the Baltic Sea proper suggest complex patterns of regulation. Environmental Microbiology Reports. 1. 145-154.

Article, review/survey (Refereed)

Farnelid, H., Turk-Kubo, K., Del Carmen Munoz-Marin, M., Zehr, J.P. (2016). New insights into the ecology of the globally significant uncultured nitrogen-fixing symbiont UCYN-A. Aquatic Microbial Ecology. 77. 125-138.

Chapter in book (Other academic)

Farnelid, H., Riemann, L. (2008). Heterotrophic N2-fixing bacteria: overlooked in the marine nitrogen cycle?. Nitrogen Fixation Research Progress. New York, Nova Science Publishers. 409-423.

Doctoral thesis, comprehensive summary (Other academic)

Farnelid, H. (2013). Distribution and activity of nitrogen-fixing bacteria in marine and estuarine waters. Doctoral Thesis. Växjö, Kalmar, Linnaeus University Press.