Bjarte Hannisdal
Stilling
Førsteamanuensis, iEarth Education Chair, Leder av iEarth fokusområde 1
Tilhørighet
Forskergrupper
Forskning
Kvantitativ paleobiologi og geobiologi
Geosystemer og jordens historie
Kausalitet i dynamiske systemer
Utvikling av høyere utdanning
Undervisning
Jeg er involvert i iEarth, et nasjonalt konsortium av geofaglige institutter som fikk status som Senter for fremragende utdanning i 2020. Jeg er iEarth Education Chair ved Institutt for geovitenskap og leder av iEarth fokusområde 1, som har som mål å skape et nytt rammeverk for utvikling av høyere utdanning. Endringsprosessen er også tema for doktorgradsprosjektet til Dario Blumenschein.
Jeg har utviklet og underviser i følgende emner:
GEOV114 - Innføring i geobiologi
GEOV302 - Dataanalyse i geovitskap
Jeg er også involvert i følgende emner:
GEOV344 - Geobiologi og livets utvikling på jorden
BIO318 - Aktuelle geobiologiske tema
Publikasjoner
Møller TE, Le Moine Bauer S, Hannisdal B, Zhao R, Baumberger T, Roerdink DL, Dupuis A, Thorseth IH, Pedersen RB, Jørgensen SL (2022). Mapping microbial abundance and prevalence to changing oxygen concentration in deep-sea sediments using machine learning and differential abundance. Frontiers in microbiology 13: 804575. [doi]
Diego D, Hannisdal B, Dahle H (2021). On how the power supply shapes microbial survival. Mathematical Biosciences 338: 108615. [doi]
Brendryen J, Haflidason H, Yokoyama Y, Haaga KA, and Hannisdal B (2020). Eurasian ice sheet collapse was a major source of Meltwater Pulse 1A 14,600 years ago. Nature Geoscience 13: 363–368. [doi] [News & Views]
Meinicke N, Ho SL, Hannisdal B, Nürnberg D, Tripati A, Schiebel R, and Meckler AN (2020). A robust calibration of the clumped isotopes to temperature relationship for foraminifers, Geochimica et Cosmochimica Acta 270, 160-183. [doi]
Haaga KA, Diego D, Brendryen J, Hannisdal B (2020). A simple test for causality in complex systems. [arXiv Preprint].
Haaga KA, Diego D, and Hannisdal B (2019). Surrogate data generation using the Perron-Frobenius operator. [OSF Preprint].
Zhao R, Hannisdal B, Mogollon JM, and Jørgensen SL (2019). Nitrifier abundance and diversity peak at deep redox transitions. Scientific Reports 9: 8633. [doi]
Diego D, Haaga KA, and Hannisdal B (2019). Transfer entropy computation using the Perron-Frobenius operator. Physical Review E 99 (4), 042212. [doi]
Piasecki A, Bernasconi SM, Grauel AL, Hannisdal B, Ho SL, Leutert TJ, et al. (2019). Application of Clumped Isotope Thermometry to Benthic Foraminifera. Geochemistry, Geophysics, Geosystems 20, 2082-2090. [doi]
Haaga KA, Brendryen J, Diego D, and Hannisdal B (2018). Forcing of Late Pleistocene ice volume by spatially variable summer energy. Scientific Reports 8, 11520. [doi] [pdf]
Hannisdal B and Liow LH (2018). Causality from palaeontological time series. Palaeontology 61, 495-509. [doi] [pdf]
Dunhill AM, Hannisdal B, Brocklehurst N, and Benton MJ (2018). On formation-based sampling proxies and why they should not be used to correct the fossil record. Palaeontology 61, 119-132. [doi] [pdf]
Pechlivanidou S, Cowie PA, Hannisdal B, Whittaker AC, Gawthorpe RL, Pennos C, and Riiser OS (2018) Source-to-sink analysis in an active extensional setting: Holocene erosion and deposition in the Sperchios rift, central Greece. Basin Research 30, 522-543. [doi] [pdf]
Hannisdal B, Haaga KA, Reitan T, Diego D, and Liow LH (2017). Common species link global ecosystems to climate change: dynamical evidence in the planktonic fossil record. Proceedings of the Royal Society B 284 (1858). [doi] [pdf] [supplement] [code]
Dunhill AM, Hannisdal B, and Benton MJ (2014) Disentangling rock record bias and common-cause from redundancy in the British fossil record. Nature Communications 5: 4818. [doi] [link]
Gittel A, Bárta J, Kohoutová I, Mikutta R, Owens S, Gilbert J, Schnecker J, Wild B, Hannisdal B, Maerz J, Lashchinskiy N, Čapek P, Šantrůčková H, Gentsch N, Shibistova O, Guggenberger G, Richter A, Torsvik VL, Schleper C, and Urich T (2014). Distinct microbial communities associated with buried soils in the Siberian tundra. The ISME Journal 8: 841–853. [doi]
Hannisdal B, Henderiks J, and Liow LH (2012). Long-term evolutionary and ecological responses of calcifying phytoplankton to changes in atmospheric CO2. Global Change Biology 18, 3504–3516. [doi] [pdf] [supplement]
Jorgensen SL, Hannisdal B, Lanzén A, Baumberger T, Flesland K, Fonseca R, Øvreås L, Steen IH, Thorseth IH, Pedersen RB, and Schleper C (2012). Correlating microbial community profiles with geochemical data in highly stratified sediments from the Arctic Mid-Ocean Ridge. PNAS 109 (42), E2846-E2855. [doi] [pdf] [commentary]
Hannisdal B and Peters SE (2011). Phanerozoic Earth system evolution and marine biodiversity. Science 334, 1121-1124. [doi] [pdf] [SOM] [perspective]
Hannisdal B (2011). Non-parametric inference of causal interactions from geological records. American Journal of Science 311, 315-334. [doi]
Hannisdal B (2011). Detecting common-cause relationships with directional information transfer. In A. McGowan and A.B. Smith (eds.), Comparing the Geological and Fossil Records: Implications for Biodiversity Studies. Geological Society London, Special Publications 358, 19-29. [doi] [pdf]
Dahle H, Hannisdal B, Steinsbu BO, Ommedal H, Einen J, Jensen S, Larsen Ø, Øvreås L, and Norland S (2011). Evolution of temperature optimum in Thermotogaceae and the prediction of trait values of uncultured organisms. Extremophiles 15, 509-516.[pdf]
Hannisdal B and Peters SE (2010). On the relationship between macrostratigraphy and geological processes: quantitative information capture and sampling robustness. Journal of Geology 118, 111-130. [pdf]
Hannisdal B (2007). Inferring phenotypic evolution in the fossil record by Bayesian inversion. Paleobiology 33, 98-115. [doi]
Hannisdal B (2006). Phenotypic evolution in the fossil record: numerical experiments. Journal of Geology 114, 133-153. [doi]
Hannisdal B (2004). Clams and brachiopods: chips that pass out of sight. Palaios 19, 507-513. [doi]
Kowalewski M, Carroll M, Casazza L, Gupta N, Hannisdal B, Hendy A, Krause Jr. RA, LaBarbera M, Lazo DG, Messina C, Puchalski S, Rothfus TA, Sälgeback J, Stempien J, Terry RC, Tomasovych A (2003). Quantitative fidelity of brachiopod-mollusk assemblages from modern subtidal environments of San Juan Islands, USA. Journal of Taphonomy 1, 43-65. [pdf]
Hannisdal B (2001). Cladistic analysis of entelophyllid rugose corals from the Silurian of northern Europe: some methodological aspects. In: Ezaki, Y (ed.), Proc. 8th Int. Symp. Fossil Cnidaria and Porifera. Bulletin of the Tohoku University Museum 1, 50-61.
Vitenskapelig artikkel
- Blumenschein, Dario; Hannisdal, Bjarte (2024). Social network analysis and educational change: unravelling the role of innovative teaching staff in a higher education environment. (ekstern lenke)
- Møller, Tor Einar; Moine-Bauer, Sven Le; Hannisdal, Bjarte et al. (2022). Mapping Microbial Abundance and Prevalence to Changing Oxygen Concentration in Deep-Sea Sediments Using Machine Learning and Differential Abundance. (ekstern lenke)
- Diego Castro, David; Hannisdal, Bjarte; Dahle, Håkon (2021). On how the power supply shapes microbial survival. (ekstern lenke)
- Brendryen, Jo; Haflidason, Haflidi; Yokoyama, Yusuke et al. (2020). Eurasian Ice Sheet collapse was a major source of Meltwater Pulse 1A 14,600 years ago. (ekstern lenke)
- Meinicke, Niklas; Ho, Sze Ling; Hannisdal, Bjarte et al. (2020). A robust calibration of the clumped isotopes to temperature relationship for foraminifers. (ekstern lenke)
- Piasecki, Alison; Bernasconi, Stefano M.; Grauel, Anna-Lena et al. (2019). Application of Clumped Isotope Thermometry to Benthic Foraminifera. (ekstern lenke)
- Diego Castro, David; Haaga, Kristian Agasøster ; Hannisdal, Bjarte (2019). Transfer entropy computation using the Perron-Frobenius operator. (ekstern lenke)
- Zhao, Rui; Hannisdal, Bjarte; Mogollon, Jose M et al. (2019). Nitrifier abundance and diversity peak at deep redox transition zones. (ekstern lenke)
- Dunhill, Alexander M.; Hannisdal, Bjarte; Brocklehurst, Neil et al. (2018). On formation-based sampling proxies and why they should not be used to correct the fossil record. (ekstern lenke)
- Haaga, Kristian Agasøster ; Brendryen, Jo; Diego Castro, David et al. (2018). Forcing of late Pleistocene ice volume by spatially variable summer energy. (ekstern lenke)
- Hannisdal, Bjarte; Haaga, Kristian Agasøster ; Reitan, Trond et al. (2017). Common species link global ecosystems to climate change: Dynamical evidence in the planktonic fossil record. (ekstern lenke)
- Pechlivanidou, Sofia; Cowie, Patience; Hannisdal, Bjarte et al. (2017). Source-to-sink analysis in an active extensional setting: Holocene erosion and deposition in the Sperchios rift, central Greece. (ekstern lenke)
- Gittel, Antje; Barta, Jiri; Kohoutova, Iva et al. (2014). Distinct microbial communities associated with buried soils in the Siberian tundra. (ekstern lenke)
- Dunhill, Alexander M.; Hannisdal, Bjarte; Benton, Michael J. (2014). Disentangling rock record bias and common-cause from redundancy in the British fossil record. (ekstern lenke)
- Jørgensen, Steffen Leth; Hannisdal, Bjarte; Lanzén, Anders et al. (2012). Correlating microbial community profiles with geochemical data in highly stratified sediments from the Arctic Mid-Ocean Ridge. (ekstern lenke)
- Dahle, Håkon; Hannisdal, Bjarte; Steinsbu, Bjørn Olav et al. (2011). Evolution of temperature optimum in Thermotogaceae and the prediction of trait values of uncultured organisms. (ekstern lenke)
- Hannisdal, Bjarte; Peters, Shanan E. (2011). Phanerozoic Earth System Evolution and Marine Biodiversity. (ekstern lenke)
- Hannisdal, Bjarte (2011). Non-parametric inference of causal interactions from geological records. (ekstern lenke)
- Hannisdal, Bjarte; Peters, Shanan E. (2010). On the relationship between macrostratigraphy and geological processes: quantitative information capture and sampling robustness. (ekstern lenke)
- Hannisdal, Bjarte (2007). Inferring phenotypic evolution in the fossil record by Bayesian inversion. (ekstern lenke)
- Hannisdal, Bjarte (2006). Phenotypic evolution in the fossil record: numerical experiments. (ekstern lenke)
- Hannisdal, Bjarte (2004). Clams and Brachiopods: chips that pass out of sight. (ekstern lenke)
- Kowalewski, Michal; Carroll, Monica; Casazza, Lorraine et al. (2003). Quantitative fidelity of brachiopod-mollusk assemblages from modern subtidal environments of San Juan Islands, USA. (ekstern lenke)
Poster
- Brendryen, Jo; Haflidason, Haflidi; Yokoyama, Y. et al. (2019). Temporal evolution of Norwegian Sea radiocarbon content during the last deglaciation, towards a regional 14C calibration curve.. (ekstern lenke)
- Møller, Tor Einar; De Luca Peña, Laura Vittoria; Haaga, Kristian Agasøster et al. (2018). Computational practices in student learning of Earth systems. (ekstern lenke)
- Hannisdal, Bjarte; Brendryen, Jo (2014). Drive-Response Analysis of Global Ice Volume, CO2, and Insolation using Information Transfer. (ekstern lenke)
- Reigstad, Laila Johanne; Baumberger, Tamara; Pedersen, Rolf B. et al. (2014). Potential environmental impacts of CO2 leakage from sub-seafloor CO2 Storage sites.. (ekstern lenke)
- Reigstad, Laila Johanne; Pedersen, Rolf B.; Baumberger, Tamara et al. (2013). Potential environmental impacts of CO2 leakage from sub-seafloor CO2 storage sites. (ekstern lenke)
- Brendryen, Jo; Hannisdal, Bjarte (2013). Disentangling Quaternary Climate System Interactions Using Information-Theoretic Time Series Analysis. (ekstern lenke)
- Henderiks, Jorijntje; Gerecht, Andrea; Hannisdal, Bjarte et al. (2013). PhytoSCALE project: calibrating phytoplankton cell size as a proxy for climatic adaptation. (ekstern lenke)
- Kemp, David B.; Hannisdal, Bjarte (2012). Timescale uncertainty in stratigraphy and cyclostratigraphic consequences. (ekstern lenke)
- Hannisdal, Bjarte (2012). Detecting Causal Interactions in Deep Time. (ekstern lenke)
- Jørgensen, Steffen Leth; Lanzén, Anders; Baumberger, Tamara et al. (2011). High resolution community profiling of stratified sediments associated with Loki’s castle vent field at the Knipovitch spreading ridge. (ekstern lenke)
- Sømme, Tor Oftedal; Helland-Hansen, William; Hannisdal, Bjarte et al. (2010). Factors controlling stratigraphy and the use of uniformitarianism when interpreting the stratigraphic record. (ekstern lenke)
- Hannisdal, Bjarte; Hutton, Eric W.H. (2008). Exploring the impact of bioturbation on seascape evolution using SedFlux-2.0. (ekstern lenke)
- Henderiks, Jorijntje; Hannisdal, Bjarte; Rickaby, R.E. et al. (2008). The Scales of Coccolithophores: Adaptation to Climate Change. (ekstern lenke)
- Hannisdal, Bjarte (2007). Detecting subtle morphological changes in Miocene Pseudononion (foram.) with multimodel inference. (ekstern lenke)
Vitenskapelig foredrag
- Brendryen, Jo; Haflidason, Haflidi; Yokoyama, Y. et al. (2019). Collapse of Eurasian ice sheets 14,600 years ago was a major source of global Meltwater Pulse 1a.. (ekstern lenke)
- Brendryen, Jo; Haflidason, Haflidi; Yokoyama, Y. et al. (2019). Temporal evolution of Norwegian Sea marine 14C reservoir ages 12.5 to 19 kyr ago: implications for deglacial 14C chronologies.. (ekstern lenke)
- Steinsland, Kristine; Brendryen, Jo; Haflidason, Haflidi et al. (2019). Deglacial ice sheet dynamics of the marine based Fennoscandian ice sheet on the Vesterålen margin.. (ekstern lenke)
- Iversen, Einar; Hannisdal, Bjarte (2018). På vei mot mer studentorientert undervisning og læring i geostatistikk. (ekstern lenke)
- Hannisdal, Bjarte; Iversen, Einar (2018). Data Analysis in Geosciences: Fostering Computational Learning. (ekstern lenke)
- Haaga, Kristian Agasøster; Diego, David; Brendryen, Jo et al. (2016). Non-parametric causal assessment in deep-time geological records. (ekstern lenke)
- Hannisdal, Bjarte; Liow, Lee Hsiang (2015). THE POSEIDON ADVENTURE: RICHNESS VERSUS COMMONNESS. (ekstern lenke)
- Jørgensen, Steffen Leth; Hannisdal, Bjarte; Thorseth, Ingunn Hindenes et al. (2014). Correlating abundances of archaeal lineages and geochemical parameters in deep-sea marine sediments. (ekstern lenke)
- Jørgensen, Steffen Leth; Hannisdal, Bjarte; Thorseth, Ingunn Hindenes et al. (2014). Linking prokaryotes and geochemical parameters in Deep sea marine sediments. (ekstern lenke)
- Jørgensen, Steffen Leth; Lanzén, Anders; Baumberger, Tamara et al. (2013). Correlating microbial community structure with geochemical data in sediments from the Arctic Mid-Ocean Ridge. (ekstern lenke)
- Gittel, Antje; Barta, Jiri; Kohoutova, Iva et al. (2013). Microbial communities associated with buried carbon in cryoturbated soils of the Siberian Arctic, and their response to a warming climate. (ekstern lenke)
- Hannisdal, Bjarte (2013). Earth Systems Interactions in Deep Time. (ekstern lenke)
- Hannisdal, Bjarte (2013). Phanerozoic Earth System Evolution: Paleozoic vs. post-Paleozoic Interactions. (ekstern lenke)
- Jørgensen, Steffen Leth; Pedersen, Rolf B.; Thorseth, Ingunn Hindenes et al. (2012). Correlating geochemical data with microbial community structure in highly stratified sediments from the Arctic mid-ocean ridge. (ekstern lenke)
- Hannisdal, Bjarte (2012). How Low Can You Go? Causality Detection in Incomplete Records. (ekstern lenke)
- Košler, Jan; Hannisdal, Bjarte (2012). Information transfer analysis of laser-induced elemental fractionation in ICP-MS. (ekstern lenke)
- Hannisdal, Bjarte (2012). Geobiology. (ekstern lenke)
- Hannisdal, Bjarte (2012). Detecting Earth systems interactions in deep time. (ekstern lenke)
- Hannisdal, Bjarte (2012). Detecting Earth systems interactions in deep time. (ekstern lenke)
- Hannisdal, Bjarte; Peters, Shanan E. (2011). Phanerozoic Earth system evolution and marine biodiversity. (ekstern lenke)
- Henderiks, Jorijntje; Hannisdal, Bjarte; Liow, Lee Hsiang (2010). Calcifying phytoplankton biomass and CO2: A striking balance. (ekstern lenke)
- Henderiks, Jorijntje; Hannisdal, Bjarte; Rickaby, Rosalind E. M. et al. (2010). Phytoplankton size: climatic adaptation and long-term evolution. (ekstern lenke)
- Henderiks, Jorijntje; Hannisdal, Bjarte; Liow, Lee Hsiang (2010). Calcifying phytoplankton biomass and CO2: a striking balance. (ekstern lenke)
- Hannisdal, Bjarte; Henderiks, Jorijntje; Liow, Lee Hsiang (2010). Cenozoic reduction in cell size and abundance of marine calcifying phytoplankton driven by a decline in atmospheric pCO2. (ekstern lenke)
- Helland-Hansen, William; Sømme, Tor Oftedal; Hannisdal, Bjarte et al. (2010). Partitioning and preservation of sediment over multiple time-scales. (ekstern lenke)
- Hannisdal, Bjarte (2010). Inferring causal relationships between geological and fossil records. (ekstern lenke)
- Hannisdal, Bjarte (2010). Coupling between marine calcifying phytoplankton and atmospheric pCO2 over the Cenozoic. (ekstern lenke)
- Hannisdal, Bjarte (2009). The role of life in Earth surface dynamics. (ekstern lenke)
- Liow, Lee Hsiang; Hannisdal, Bjarte (2009). Inferring climatic and biotic forcing of diversity and the global rise of species. (ekstern lenke)
- Hannisdal, Bjarte; Henderiks, Jorijntje (2009). Climatic forcings on algal cell size through the Cenozoic. (ekstern lenke)
- Hannisdal, Bjarte; Henderiks, Jorijntje (2009). Cenozoic climatic forcing of algal cell size. (ekstern lenke)
- Hannisdal, Bjarte (2008). The impact of bioturbation on seascape evolution. (ekstern lenke)
- Hannisdal, Bjarte (2008). The role of life in Earth surface dynamics. (ekstern lenke)
- Hannisdal, Bjarte; Hutton, Eric W.H. (2008). Exploring the impact of bioturbation on seascape evolution. (ekstern lenke)
- Hannisdal, Bjarte; Mcloughlin, Nicola (2008). BGB-01: General Contributions to biogeosciences. (ekstern lenke)
- Peters, Shanan E.; Hannisdal, Bjarte (2007). The effect of depositional sequence asymmetry on origination and extinction rates: insights from modeling. (ekstern lenke)
- Hannisdal, Bjarte (2007). Inferring evolutionary patterns in the fossil record by Bayesian inversion. (ekstern lenke)
Vitenskapelig oversiktsartikkel/review
Faglig foredrag
- Hannisdal, Bjarte (2016). Species commonness in deep time. (ekstern lenke)
- Hannisdal, Bjarte (2016). Detecting causality in geological records: problems and prospects. (ekstern lenke)
- Brendryen, Jo; Hannisdal, Bjarte; Haaga, Kristian Agasøster et al. (2016). Ocean-Ice Sheet Interactions in the Norwegian Sea and Teleconnections to Low Latitude Hydrology and Atmospheric Circulation. (ekstern lenke)
- Hannisdal, Bjarte (2014). Detecting Earth system interactions in geological records. (ekstern lenke)
- Hannisdal, Bjarte (2014). Macroevolution in the microfossil record: commonness or richness?. (ekstern lenke)
- Liow, Lee Hsiang; Hannisdal, Bjarte (2014). How important (and easy) is counting taxa through time?. (ekstern lenke)
- Pechlivanidou, Sofia; Cowie, Patience; Hannisdal, Bjarte et al. (2014). Controls on deltaic sedimentation in an active rift setting: a source-to-sink approach from the Sperchios delta, central Greece. (ekstern lenke)
- Dunhill, AM; Hannisdal, Bjarte; Benton, MJ (2014). Disentangling rock record bias, common-cause and redundancy in the fossil record. (ekstern lenke)
- Hannisdal, Bjarte; Liow, LH (2014). Cenozoic macroevolution in the deep-sea microfossil record: can we let go of species richness?. (ekstern lenke)
- Gittel, Antje; Bárta, Jiří; Lacmanova, Iva et al. (2014). Distinct microbial communities associated with buried soils in the Siberian tundra. (ekstern lenke)
Populærvitenskapelig foredrag
- Hannisdal, Bjarte (2015). The Co-Evolution of Earth and Life. (ekstern lenke)
- Hannisdal, Bjarte (2015). The Co-Evolution of Earth and Life. (ekstern lenke)
- Hannisdal, Bjarte (2010). Darwin's Last Idea - from walrus feeding to astrobiology. (ekstern lenke)
- Hannisdal, Bjarte (2009). Coupling between global climate change and marine planton macroecology over the Cenozoic. (ekstern lenke)
- Hannisdal, Bjarte (2009). Quantitative stratigraphy: relating stratigraphic architecture to geological processes. (ekstern lenke)
- Hannisdal, Bjarte (2008). Om Darwin, hvalross-geologi og karbonsyklusen. (ekstern lenke)
Intervju
- Hannisdal, Bjarte (2014). How good is the fossil record? New study casts doubt on their usefulness. (ekstern lenke)
- Hannisdal, Bjarte (2014). Is The Fossil Record Too Incomplete?. (ekstern lenke)
- Hannisdal, Bjarte (2014). How good is the fossil record?. (ekstern lenke)
- Hannisdal, Bjarte (2014). How good is the fossil record?. (ekstern lenke)
- Hannisdal, Bjarte (2014). How Good is the Fossil Record and Does it Give a Balanced History of Life?. (ekstern lenke)
- Hannisdal, Bjarte (2013). Bergen forskningsstiftelse stipend til Bjarte Hannisdal. (ekstern lenke)
- Hannisdal, Bjarte (2013). Gir 20 millioner til unge forskere. (ekstern lenke)
- Hannisdal, Bjarte (2013). Milliondryss over unge forskere. (ekstern lenke)
- Hannisdal, Bjarte (2013). Geologidag i Steinparken. (ekstern lenke)
- Hannisdal, Bjarte (2013). Gir 20 millioner til unge forskere. (ekstern lenke)
- Hannisdal, Bjarte (2013). Verdenshavenes tilstand. (ekstern lenke)
- Hannisdal, Bjarte (2013). Stein, regn og paraply. (ekstern lenke)
- Hannisdal, Bjarte (2013). Lokale nyhende. (ekstern lenke)
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Prosjekter
Se prosjektsidene for Earth System Evolution
Se også iEarth fokusområde 1: Shaping the Future
Utdanning
2006: Ph.D., Geophysical Sciences, University of Chicago, USA
Thesis title: Inferring phenotypic evolution in the fossil record by Bayesian inversion.
2000: Cand. scient., Geology, University of Bergen
Thesis title: Cladistic analysis of entelophyllid rugose corals from the Silurian of Northern Europe.