Hanna Farnelid

Docent

Institutionen för biologi och miljö Fakulteten för hälso- och livsvetenskap

hanna.farnelid@lnu.se

0480-44 62 96

072-594 98 20

Jag är universitetslektor och docent i marin ekologi. Jag arbetar med bakterier och växtplankton i akvatiska miljöer. Jag är intresserad av att förstå utbredning, artsammansättning och funktion hos några av de allra minsta men mest betydelsefulla organismerna i världshaven. Jag använder traditionella mikrobiologiska metoder kombinerat med molekylärbiologi för att identifiera och undersöka hur dessa mikroorganismer reagerar och anpassar sig till olika miljöförhållanden.

Undervisning

Jag undervisar i mikrobiologi och marin ekologi i ett flertal kurser på biologiprogrammet och inom masters programmet i akvatisk ekologi. Jag är kursansvarig och examinator på kursen biologi bas-breddning inom naturvetenskapligt basår. Jag handleder studenter vid projektkurser och examensarbeten på kandidat-, magister- och mastersnivå.

Forskning

Jordens yta består till 70% av hav. Bakterier och växtplankton har en betydande roll för det marina ekosystemet både genom att de producerar och bryter ner organiskt material. I min forskning utforskar jag frågor som rör mikroorganismers utbredning, artsammansättning och funktion. Kunskap om dessa organismer är av stor vikt för att förstå vilka konsekvenser framtida miljöförhållanden kommer att få och hur de påverkar näringskedjor i havet.

Uppdrag

Analytiker vid Havsmiljöinstitutet (10%)

Mina forskargrupper

Mina pågående forskningsprojekt

Publikationer

Artikel i tidskrift (Refereegranskat)

Mollica, T., Farnelid, H., Lindehoff, E., Legrand, C. (2025). Smaller phytoplankton size-groups control the stoichiometry of the autotrophic community. Limnology and Oceanography.
Status: Epub för tryck
Aguilera, A., Lundin, D., Charalampous, E., Churakova, Y., Tellgren-Roth, C., et al. (2025). The evaluation of biogenic silica in brackish and freshwater strains reveals links between phylogeny and silica accumulation in picocyanobacteria. Applied and Environmental Microbiology.
Status: Epub för tryck
Vermassen, F., Bird, C., Weitkamp, T.M., Darling, K.F., Farnelid, H., et al. (2025). The distribution and abundance of planktonic foraminifera under summer sea ice in the Arctic Ocean. Biogeosciences. 22 (9). 2261-2286.
Status: Publicerad
Fontela, M., Fernandez-Roman, D., Broullon, E., Farnelid, H., Fernandez-Carrera, A., et al. (2025). Puzzling out the ecological niche construction for nitrogen fixers in a coastal upwelling system. ISME Communications. 5 (1).
Status: Publicerad
Weissenbach, J., Aguilera, A., Bas Conn, L., Pinhassi, J., Legrand, C., et al. (2024). Ploidy levels in diverse picocyanobacteria from the Baltic Sea. Environmental Microbiology Reports. 16 (5).
Status: Publicerad
Lindehoff, E., Mattsson, L., Olofsson, M., Svensson, F., Farnelid, H., et al. (2024). Biomass performance and stability of 5-year outdoor microalgal cultivation for CO₂ removal from cement flue gas. Bioresource Technology Reports. 25.
Status: Publicerad
Hylander, S., Farnelid, H., Fridolfsson, E., Hauber, M.M., Todisco, V., et al. (2024). Thiamin (vitamin B1, thiamine) transfer in the aquatic food web from lower to higher trophic levels. PLOS ONE. 19 (12).
Status: Publicerad
Alegria Zufia, J., Laber, C.P., Legrand, C., Lindehoff, E., Farnelid, H. (2024). Growth and mortality rates of picophytoplankton in the Baltic Sea Proper. Marine Ecology Progress Series. 735. 63-76.
Status: Publicerad
Dutkiewicz, S., Follett, C.L., Follows, M.J., Henderikx-Freitas, F., Ribalet, F., et al. (2024). Multiple biotic interactions establish phytoplankton community structure across environmental gradients. Limnology and Oceanography. 69 (5). 1086-1100.
Status: Publicerad
Laber, C.P., Alegria Zufia, J., Legrand, C., Lindehoff, E., Farnelid, H. (2024). Colony-forming and single-cell picocyanobacteria nitrogen acquisition strategies and carbon fixation in the brackish Baltic Sea. Limnology and Oceanography. 69 (9). 1955-1969.
Status: Publicerad
Mattsson, L., Farnelid, H., Hirwa, M., Olofsson, M., Svensson, F., et al. (2024). Seasonal nitrogen removal in an outdoor microalgal polyculture at Nordic conditions. Water environment research. 96 (10).
Status: Publicerad
Aguilera, A., Alegria Zufia, J., Bas Conn, L., Gurlit, L., Śliwińska‐wilczewska, S., et al. (2023). Ecophysiological analysis reveals distinct environmental preferences in closely related Baltic Sea picocyanobacteria. Environmental Microbiology. 25 (9). 1674-1695.
Status: Publicerad
Fridolfsson, E., Bunse, C., Lindehoff, E., Farnelid, H., Pontiller, B., et al. (2023). Multiyear analysis uncovers coordinated seasonality in stocks and composition of the planktonic food web in the Baltic Sea proper. Scientific Reports. 13 (1).
Status: Publicerad
Churakova, Y., Aguilera, A., Charalampous, E., Conley, D.J., Lundin, D., et al. (2023). Biogenic silica accumulation in picoeukaryotes : Novel players in the marine silica cycle. Environmental Microbiology Reports. 15 (4). 282-290.
Status: Publicerad
Pinhassi, J., Farnelid, H., Garcia, S.M., Teira, E., Galand, P.E., et al. (2022). Functional responses of key marine bacteria to environmental change - toward genetic counselling for coastal waters. Frontiers in Microbiology. 13.
Status: Publicerad
Alegria Zufia, J., Legrand, C., Farnelid, H. (2022). Seasonal dynamics in picocyanobacterial abundance and clade composition at coastal and offshore stations in the Baltic Sea. Scientific Reports. 12 (1).
Status: Publicerad
Laber, C.P., Pontiller, B., Bunse, C., Osbeck, C.M.G., Pérez Martínez, C., et al. (2022). Seasonal and Spatial Variations in Synechococcus Abundance and Diversity Throughout the Gullmar Fjord, Swedish Skagerrak. Frontiers in Microbiology. 13.
Status: Publicerad
Farnelid, H., Turk-Kubo, K., Zehr, J.P. (2021). Cell sorting reveals few novel prokaryote and photosynthetic picoeukaryote associations in the oligotrophic ocean. Environmental Microbiology. 23 (3). 1469-1480.
Status: Publicerad
Alegria Zufia, J., Farnelid, H., Legrand, C. (2021). Seasonality of Coastal Picophytoplankton Growth, Nutrient Limitation, and Biomass Contribution. Frontiers in Microbiology. 12.
Status: Publicerad
Mattsson, L., Sörenson, E., Capo, E., Farnelid, H., Hirwa, M., et al. (2021). Functional Diversity Facilitates Stability Under Environmental Changes in an Outdoor Microalgal Cultivation System. Frontiers in Bioengineering and Biotechnology. 9.
Status: Publicerad
Izabel-Shen, D., Albert, S., Winder, M., Farnelid, H., Nascimento, F.J.A. (2021). Quality of phytoplankton deposition structures bacterial communities at the water-sediment interface. Molecular Ecology. 30 (14). 3515-3529.
Status: Publicerad
Sörenson, E., Capo, E., Farnelid, H., Lindehoff, E., Legrand, C. (2021). Temperature Stress Induces Shift From Co-Existence to Competition for Organic Carbon in Microalgae-Bacterial Photobioreactor Community – Enabling Continuous Production of Microalgal Biomass. Frontiers in Microbiology. 12 (11 February). 1-17.
Status: Publicerad
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 (8). 1858-1875.
Status: Publicerad
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.
Status: Publicerad
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). 1-17.
Status: Publicerad
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 (1). 170-182.
Status: Publicerad
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 (1). 111-124.
Status: Publicerad
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 (3). 425-433.
Status: Publicerad
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.
Status: Publicerad
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 (2). 451-461.
Status: Publicerad
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). 1-10.
Status: Publicerad
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.
Status: Publicerad
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.
Status: Publicerad
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 (2). 358-371.
Status: Publicerad
Farnelid, H., Harder, J., Bentzon-Tilia, M., Riemann, L. (2014). Isolation of heterotrophic diazotrophic bacteria from estuarine surface waters. Environmental Microbiology. 16 (10). 3072-3082.
Status: Publicerad
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 (7). 1413-1423.
Status: Publicerad
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 (44). 17989-17994.
Status: Publicerad
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 (4). e19223.
Status: Publicerad
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.
Status: Publicerad
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 (2). 105-117.
Status: Publicerad
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.
Status: Publicerad

Artikel, forskningsöversikt (Refereegranskat)

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 (3). 125-138.
Status: Publicerad

Kapitel i bok, del av antologi (Övrigt vetenskapligt)

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.

Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)

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

Manuskript (Övrigt vetenskapligt)

Mattsson, L., Sörenson, E., Capo, E., Farnelid, H., Hirwa, M., et al. Functional diversity facilitates resilience to environmental changes in long-term microalgal cultivation system.
Sörenson, E., Farnelid, H., Lindehoff, E., Legrand, C. Resource partitioning between phytoplankton and bacteria in the coastal Baltic Sea.
Amnebrink, D., Pontiller, B., Bunse, C., Lundin, D., Farnelid, H., et al. Genome-resolved analysis reveals transcriptional transitions across seasons in Baltic Sea prokaryotes.
Amnebrink, D., Pontiller, B., González, J., Lundin, D., Andersson, A., et al. Seasonal dynamics and life cycle strategies of the cyanobacterium Aphanizomenon in the Baltic proper.
Mollica, T., Farnelid, H., Lindehoff, E., Lundin, D., Pinhassi, J., et al. Phosphorus acquisition strategies among phytoplankton and free-living bacterial communities in the Baltic Proper.
Lindehoff, E., Mattsson, L., Olofsson, M., Svensson, F., Farnelid, H., et al. Performance and biomass stability of 5-year outdoor microalgal cultivation for CO₂ removal from cement flue gas.
Mattsson, L., Farnelid, H., Hirwa, M., Olofsson, M., Svensson, F., et al. Seasonal nitrogen removal in an outdoor polyculture at Nordic conditions.
Mollica, T., Lindehoff, E., Lundin, D., Pinhassi, J., Olofsson, M., et al. Seasonal phosphorus acquisition among pelagic microbial communities across the Gulf of Bothnia, Baltic Sea.