Trond Reitan

• Wilson, Connor J.; Reitan, Trond & Liow, Lee Hsiang (2024). Unveiling the underlying drivers of Phanerozoic marine diversification. Proceedings of the Royal Society of London. Biological Sciences. ISSN 0962-8452. doi: 10.1098/rspb.2024.0165.
• Saulsbury, James; Parins-Fukuchi, C. Tomomi; Wilson, Connor J.; Reitan, Trond & Liow, Lee Hsiang (2023). Age-dependent extinction and the neutral theory of biodiversity. Proceedings of the National Academy of Sciences of the United States of America. ISSN 0027-8424. 121(1). doi: 10.1073/pnas.2307629121. Fulltekst i vitenarkiv
• Reitan, Trond; Di Martino, Emanuela & Liow, Lee Hsiang (2023). Estimating relative species abundance using fossil data identified to different taxonomic levels. Ecography. ISSN 0906-7590. 2024(1). doi: 10.1111/ecog.06866. Fulltekst i vitenarkiv
• Reinar, William Brynildsen; Greulich, Anne; Stø, Ida Myhrer; Knutsen, Jonfinn Mordekai Blix; Reitan, Trond & Tørresen, Ole K. [Vis alle 9 forfattere av denne artikkelen] (2023). Adaptive protein evolution through length variation of short tandem repeats in Arabidopsis. Science Advances. ISSN 2375-2548. 9(12), s. 1–10. doi: 10.1126/sciadv.add6960. Fulltekst i vitenarkiv
• Kibaja, Mohamed Julius; Mekonnen, Addisu ; Reitan, Trond; Nahonyo, Cuthbert L.; Levi, Matana & Stenseth, Nils Christian [Vis alle 7 forfattere av denne artikkelen] (2023). On the move: Activity budget and ranging ecology of endangered Ashy red colobus monkeys (Piliocolobus tephrosceles) in a savanna woodland habitat. Global Ecology and Conservation. ISSN 2351-9894. 43, s. 1–15. doi: 10.1016/j.gecco.2023.e02440. Fulltekst i vitenarkiv
• Sydenham, Markus A. K.; Venter, Zander; Moe, Stein Ragnar; Eldegard, Katrine; Kuhlmann, M. & Reitan, Trond [Vis alle 15 forfattere av denne artikkelen] (2022). Neutral processes related to regional bee commonness and dispersal distances are important predictors of plant–pollinator networks along gradients of climate and landscape conditions. Ecography. ISSN 0906-7590. 2022(12). doi: 10.1111/ecog.06379. Fulltekst i vitenarkiv Vis sammendrag

  Understanding how niche-based and neutral processes contribute to the spatial varia-tion in plant–pollinator interactions is central to designing effective pollination con-servation schemes. Such schemes are needed to reverse declines of wild bees and other pollinating insects, and to promote pollination services to wild and cultivated plants. We used data on wild bee interactions with plants belonging to the four tribes Loteae, Trifolieae, Anthemideae and either spring- or summer-flowering Cichorieae, sampled systematically along a 682 km latitudinal gradient to build models that allowed us to 1) predict occurrences of pairwise bee–flower interactions across 115 sampling locations, and 2) estimate the contribution of variables hypothesized to be related to niche-based assembly structuring processes (viz. annual mean temperature, landscape diversity, bee sociality, bee phenology and flower preferences of bees) and neutral processes (viz. regional commonness and dispersal distance to conspecifics). While neutral processes were important predictors of plant–pollinator distributions, niche-based processes were reflected in the contrasting distributions of solitary bee and bumble bees along the temperature gradient, and in the influence of bee flower preferences on the distri-bution of bee species across plant types. In particular, bee flower preferences separated bees into three main groups, albeit with some overlap: visitors to spring-flowering Cichorieae; visitors to Anthemideae and summer-flowering Cichorieae; and visitors to Trifolieae and Loteae. Our findings suggest that both neutral and niche-based pro-cesses are significant contributors to the spatial distribution of plant–pollinator inter-actions so that conservation actions in our region should be directed towards areas: Page 2 of 11near high concentrations of known occurrences of regionally rare bees; in mild climatic conditions; and that are surrounded by heterogenous landscapes. Given the observed niche-based differences, the proportion of functionally distinct plants in flower-mixes could be chosen to target bee species, or guilds, of conservation concern. Keywords: ecological networks, machine learning, plant–pollinator interactions, spatial, wild bees

• Reitan, Trond; Ergon, Torbjørn & Liow, Lee Hsiang (2022). Relative species abundance and population densities of the past: Developing multispecies occupancy models for fossil data. Paleobiology. ISSN 0094-8373. 49(1), s. 23–38. doi: 10.1017/pab.2022.17. Fulltekst i vitenarkiv
• Sydenham, Markus A. K.; Venter, Zander; Reitan, Trond; Rasmussen, Claus; Skrindo, Astrid Brekke & Skoog, Daniel Ingvar Jeuderan [Vis alle 12 forfattere av denne artikkelen] (2021). MetaComNet: A random forest-based framework for making spatial predictions of plant–pollinator interactions. Methods in Ecology and Evolution. ISSN 2041-210X. 13(2), s. 500–513. doi: 10.1111/2041-210X.13762. Fulltekst i vitenarkiv Vis sammendrag

  1. Predicting plant–pollinator interaction networks over space and time will improve our understanding of how environmental change is likely to impact the functioning of ecosystems. Here we propose a framework for producing spatially explicit predictions of the occurrence and number of pairwise plant–pollinator interactions and of the species richness, diversity and abundance of pollinators visiting flowers. We call the framework ‘MetaComNet’ because it aims to link metacommunity dynamics to the assembly of ecological networks. 2. To illustrate the MetaComNet functionality, we used a dataset on bee–flower networks sampled at 16 sites in southeast Norway along with random forest models to predict bee–flower interactions. We included variables associated with climatic conditions (elevation) and habitat availability within a 250 m radius of each site. Regional commonness, site-specific distance to conspecifics, social guild and floral preference were included as bee traits. Each plant species was assigned a score reflecting its site-specific abundance, and four scores reflecting the bee species that the plant family is known to attract. We used leave-one-out cross-validations to assess the models' ability to predict pairwise plant–bee interactions across the landscape. 3. The relationship between observed occurrence or absence of interactions and the predicted probability of interactions was nearly proportional (GLMlogistic regression slope = 1.09), matching the data well (AUC = 0.88), and explained 30% of the variation. Predicted probability of interactions was also correlated with the number of observed pairwise interactions (r = 0.32). The sum of predicted probabilities of bee–flower interactions were positively correlated with observed species richness (r = 0.50), diversity (r = 0.48) and abundance (r = 0.42) of wild bees interacting with plant species within sites. 4. Our findings show that the MetaComNet framework can be a useful approach for making spatially explicit predictions and mapping plant–pollinator interactions. Such predictions have the potential to identify areas where the pollination potential for wild plants is particularly high, and where conservation action should be directed to preserve this ecosystem function. interactions, network, plants, pollinators, predict, random forest

• Reinar, William Brynildsen; Olsson, Vilde; Reitan, Trond; Jakobsen, Kjetill Sigurd & Butenko, Melinka Alonso (2021). Length variation in short tandem repeats affects gene expression in natural populations of Arabidopsis thaliana. The Plant Cell. ISSN 1040-4651. 33(7), s. 2221–2234. doi: 10.1093/plcell/koab107. Fulltekst i vitenarkiv
• Hernandez-Aguilar, Raquel Adriana & Reitan, Trond (2020). Deciding Where to Sleep: Spatial Levels of Nesting Selection in Chimpanzees (Pan troglodytes) Living in Savanna at Issa, Tanzania. International Journal of Primatology. ISSN 0164-0291. 41, s. 870–900. doi: 10.1007/s10764-020-00186-z. Fulltekst i vitenarkiv
• Luo, Tian-Tong; Zhu, Jian-Long; Reitan, Trond & Yedid, Gabriel (2020). Alteration of (FrequencyDependent) Fitness in Time-Shift Experiments Reveals Cryptic Coevolution and Uncoordinated Stasis in a Virtual Jurassic Park. Artificial Life. ISSN 1064-5462. 26(2), s. 196–216. doi: 10.1162/artl_a_00305. Fulltekst i vitenarkiv
• Nilsson, Anna L. K.; Skaugen, Thomas; Reitan, Trond; L'Abee-Lund, Jan Henning; Gamelon, Marlène & Jerstad, Kurt [Vis alle 11 forfattere av denne artikkelen] (2020). Hydrology influences breeding time in the white-throated dipper. BMC Ecology. ISSN 1472-6785. 20(70). doi: 10.1186/s12898-020-00338-y. Fulltekst i vitenarkiv Vis sammendrag

  Background: Earlier breeding is one of the strongest responses to global change in birds and is a key factor determining reproductive success. In most studies of climate effects, the focus has been on large-scale environmental indices or temperature averaged over large geographical areas, neglecting that animals are affected by the local conditions in their home ranges. In riverine ecosystems, climate change is altering the flow regime, in addition to changes resulting from the increasing demand for renewable and clean hydropower. Together with increasing temperatures, this can lead to shifts in the time window available for successful breeding of birds associated with the riverine habitat. Here, we investigated specifically how the environmental conditions at the territory level influence timing of breeding in a passerine bird with an aquatic lifestyle, the white-throated dipper Cinclus cinclus. We relate daily river discharge and other important hydrological parameters, to a long-term dataset of breeding phenology (1978–2015) in a natural river system. Results: Dippers bred earlier when winter river discharge and groundwater levels in the weeks prior to breeding were high, and when there was little snow in the catchment area. Breeding was also earlier at lower altitudes, although the effect dramatically declined over the period. This suggests that territories at higher altitudes had more open water in winter later in the study period, which permitted early breeding also here. Unexpectedly, the largest effect inducing earlier breeding time was territory river discharge during the winter months and not immediately prior to breeding. The territory river discharge also increased during the study period. Conclusions: The observed earlier breeding can thus be interpreted as a response to climate change. Measuring environmental variation at the scale of the territory thus provides detailed information about the interactions between organisms and the abiotic environment. Breeding phenology, Climate change, Environmental heterogeneity, Hydropower, Long-term study, Passerine bird, River discharge, Snow, Spatial scale, Stream

• Nilsson, Anna L.K.; Reitan, Trond; Skaugen, Thomas; L'Abee-Lund, Jan Henning; Gamelon, Marlène & Jerstad, Kurt [Vis alle 11 forfattere av denne artikkelen] (2020). Location is everything, but climate gets a share: analyzing small-scale environmental influences on breeding success in the white-throated dipper. Frontiers in Ecology and Evolution. ISSN 2296-701X. 8. doi: 10.3389/fevo.2020.542846. Fulltekst i vitenarkiv
• Reitan, Trond & Liow, Lee Hsiang (2019). layeranalyzer: inferring correlative and causal connections from time series data in R. Methods in Ecology and Evolution. ISSN 2041-210X. 10(12), s. 2183–2188. doi: 10.1111/2041-210X.13299. Fulltekst i vitenarkiv
• Luo, Tian-Tong; Heier, Lise; Khan, Zaki Ahmad; Hasan, Faraz; Reitan, Trond & Yasseen III, Abdool S. [Vis alle 9 forfattere av denne artikkelen] (2019). Examining Community Stability in the Face of Mass Extinction in Communities of Digital Organisms. Artificial Life. ISSN 1064-5462. 24(4), s. 250–276. doi: 10.1162/artl_a_00272. Fulltekst i vitenarkiv
• Solbakken, Monica Hongrø; Jentoft, Sissel; Reitan, Trond; Mikkelsen, Helene; Gregers, Tone Fredsvik & Bakke, Oddmund [Vis alle 8 forfattere av denne artikkelen] (2019). Disentangling the immune response and host-pathogen interactions in Francisella noatunensis infected Atlantic cod. Comparative Biochemistry and Physiology - Part D:Genomics and Proteomics. ISSN 1744-117X. 30, s. 333–346. doi: 10.1016/j.cbd.2019.04.004. Fulltekst i vitenarkiv
• Solbakken, Monica Hongrø; Jentoft, Sissel; Reitan, Trond; Mikkelsen, Helene; Jakobsen, Kjetill Sigurd & Seppola, Marit (2019). Whole transcriptome analysis of the Atlantic cod vaccine response reveals subtle changes in adaptive immunity. Comparative Biochemistry and Physiology - Part D:Genomics and Proteomics. ISSN 1744-117X. 31:100597, s. 1–12. doi: 10.1016/j.cbd.2019.100597. Fulltekst i vitenarkiv
• Nilsson, Anna; Slagsvold, Tore; Røstad, Ole Wiggo; Knudsen, Endre; Jerstad, Kurt & Cadahia, Luis [Vis alle 10 forfattere av denne artikkelen] (2019). Territory location and quality, together with climate, affect the timing of breeding in the white-throated dipper. Scientific Reports. ISSN 2045-2322. 9, s. 1–11. doi: 10.1038/s41598-019-43792-5. Fulltekst i vitenarkiv Vis sammendrag

  Recent climate change has led to advanced spring phenology in many temperate regions. The phenological response to variation in the local environment, such as the habitat characteristics of the territories birds occupy, is less clear. The aim of this study is to understand how ecological conditions affect breeding time, and its consequences for reproduction, in a white-throated dipper Cinclus cinclus population in a river system in Norway during 34 years (1978–2011). Hatching date advanced almost nine days, indicating a response to higher temperatures and the advanced phenology in the area. Earlier breeding was found in warm springs and at lower altitudes. High population density facilitated earlier breeding close to the coast. Furthermore, when population density was low, breeding was early at territories that were rarely occupied, while in years with high density, breeding was early at territories that were frequently occupied. Also, when population density was low, earlier breeding occurred at territories that on average produced more offspring than other territories, while there was no difference in breeding time in high population years. Selection for early breeding was dependent on spring temperatures and high spring temperatures contributed to higher breeding success during the study period. We found that breeding phenology may have strong effects on fitness in the white-throated dipper, and thus that breeding time is an important ecological factor in a species that feeds mainly on aquatic rather than terrestrial prey.

• Liow, Lee Hsiang; Reitan, Trond; Voje, Kjetil L.; Taylor, Paul D. & Di Martino, Emanuela (2019). Size, weapons, and armor as predictors of competitive outcomes in fossil and contemporary marine communities. Ecological Monographs. ISSN 0012-9615. s. 1–15. doi: 10.1002/ecm.1354.
• Nielsen, Anders; Reitan, Trond; Rinvoll, Andreas & Brysting, Anne Krag (2017). Effects of competition and climate on a crop pollinator community. Agriculture, Ecosystems & Environment. ISSN 0167-8809. 246, s. 253–260. doi: 10.1016/j.agee.2017.06.006. Fulltekst i vitenarkiv
• Reitan, Trond & Liow, Lee Hsiang (2017). An unknown Phanerozoic driver of brachiopod extinction rates unveiled by multivariate linear stochastic differential equations. Paleobiology. ISSN 0094-8373. 43(4), s. 537–549. doi: 10.1017/pab.2017.11.
• Hannisdal, Bjarte; Haaga, Kristian Agasøster ; Reitan, Trond; Diego Castro, David & Liow, Lee Hsiang (2017). Common species link global ecosystems to climate change: Dynamical evidence in the planktonic fossil record. Proceedings of the Royal Society of London. Biological Sciences. ISSN 0962-8452. 284(1858), s. 1–9. doi: 10.1098/rspb.2017.0722. Vis sammendrag

  Common species shape the world around us, and changes in their commonness signify large-scale shifts in ecosystem structure and function. However, our understanding of long-term ecosystem response to environmental forcing in the deep past is centred on species richness, neglecting the disproportional impact of common species. Here, we use common and widespread species of planktonic foraminifera in deep-sea sediments to track changes in observed global occupancy (proportion of sampled sites at which a species is present and observed) through the turbulent climatic history of the last 65 Myr. Our approach is sensitive to relative changes in global abundance of the species set and robust to factors that bias richness estimators. Using three independent methods for detecting causality, we show that the observed global occupancy of planktonic foraminifera has been dynamically coupled to past oceanographic changes captured in deep-ocean temperature reconstructions. The causal inference does not imply a direct mechanism, but is consistent with an indirect, time-delayed causal linkage. Given the strong quantitative evidence that a dynamical coupling exists, we hypothesize that mixotrophy (symbiont hosting) may be an ecological factor linking the global abundance of planktonic foraminifera to long-term climate changes via the relative extent of oligotrophic oceans.

• Ragulina, Galina & Reitan, Trond (2017). Generalized extreme value shape parameter and its nature for extreme precipitation using long time series and the Bayesian approach. Hydrological Sciences Journal. ISSN 0262-6667. 62(6), s. 863–879. doi: 10.1080/02626667.2016.1260134. Fulltekst i vitenarkiv Vis sammendrag

  Assessing the probability of extreme precipitation events is consequential in civil planning. This requires an understanding of how return values change with return periods, which is essentially described by the generalized extreme value (GEV) shape parameter. Some works in the field suggest a constant shape parameter, while our analysis indicates a non-universal value. We re-analysed an older precipitation dataset (169 stations) extended by Norwegian data (71 stations). We showed that while each set seems to have a constant shape parameter, it differs between the two datasets, indicating regional differences. For a more comprehensive analysis of spatial effects, we examined a global dataset (1495 stations). We provided shape parameter maps for two models and found clear evidence that the shape parameter depends on elevation, while the effect of latitude remains uncertain. Our results confirm an explanation in terms of dominating precipitation systems based on a proxy derived from the Köppen-Geiger climate classification.

• Steinbakk, Gunnhildur Högnadóttir; Thorarinsdottir, Thordis Linda; Reitan, Trond; Schlichting, Lena; Hølleland, Sondre & Engeland, Kolbjørn (2016). Propagation of rating curve uncertainty in design flood estimation. Water Resources Research. ISSN 0043-1397. 52(9), s. 6897–6915. doi: 10.1002/2015WR018516. Vis sammendrag

  Statistical flood frequency analysis is commonly performed based on a set of annual maximumdischarge values which are derived from stage measurements via a stage-discharge rating curve model.Such design flood estimation techniques often ignore the uncertainty in the underlying rating curve model.Using data from eight gauging stations in Norway, we investigate the effect of curve and sample uncertain-ty on design flood estimation by combining results from a Bayesian multisegment rating curve model and aBayesian flood frequency analysis. We find that sample uncertainty is the main contributor to the designflood estimation uncertainty. However, under extrapolation of the rating curve, the uncertainty bounds forboth the rating curve model and the flood frequency analysis are highly skewed and ignoring these featuresmay underestimate the potential risk of flooding. We expect this effect to be even more pronounced in aridand semiarid climates with a higher variability in floods.

• Reitan, Trond & Nielsen, Anders (2016). Do not divide count data with count data; a story from pollination ecology with implications beyond. PLOS ONE. ISSN 1932-6203. 11(2). doi: 10.1371/journal.pone.0149129. Fulltekst i vitenarkiv
• Wolff, Mareile Astrid; Isaksen, Ketil; Petersen-Øverleir, Asgeir; Ødemark, Karianne; Reitan, Trond & Brækkan, Ragnar (2015). Derivation of a new continuous adjustment function for correcting wind-induced loss of solid precipitation: results of a Norwegian field study. Hydrology and Earth System Sciences (HESS). ISSN 1027-5606. 19(2), s. 951–967. doi: 10.5194/hess-19-951-2015.
• Liow, Lee Hsiang; Reitan, Trond & Harnik, Paul G. (2015). Ecological interactions on macroevolutionary time scales: clams and brachiopods are more than ships that pass in the night. Ecology Letters. ISSN 1461-023X. 18(10), s. 1030–1039. doi: 10.1111/ele.12485.
• Nygård, Ståle; Reitan, Trond; Clancy, Trevor; Nygaard, Vegard; BJØRNSTAD, JOHANNES & Skrbic, Biljana [Vis alle 9 forfattere av denne artikkelen] (2014). Identifying pathogenic processes by integrating microarray data with prior knowledge. BMC Bioinformatics. ISSN 1471-2105. 15(1). doi: 10.1186/1471-2105-15-115. Fulltekst i vitenarkiv
• Nielsen, Anders; Dauber, Jens; Kunin, William E.; Lamborn, Ellen; Jauker, Birgit & Moora, Mari [Vis alle 18 forfattere av denne artikkelen] (2012). Pollinator community responses to the spatial population structure of wild plants: A pan-European approach. Basic and Applied Ecology. ISSN 1439-1791. 13(6), s. 489–499. doi: 10.1016/j.baae.2012.08.008.
• Reitan, Trond; Schweder, Tore & Henderiks, Jorijntje (2012). Phenotypic evolution studied by layered stochastic differential equations. Annals of Applied Statistics. ISSN 1932-6157. 6, s. 1531–1551. doi: 10.1214/12-AOAS559. Fulltekst i vitenarkiv
• Natvig, Bent; Gåsemyr, Jørund Inge & Reitan, Trond (2012). Bayesian Assessment of Availabilities and Unavailabilities of Multistate Monotone Systems. Methodology and Computing in Applied Probability. ISSN 1387-5841. 14(4), s. 1075–1095. doi: 10.1007/s11009-011-9221-3.
• Reitan, Trond & Aas, Kjersti (2011). A new robust importance-sampling method for measuring value-at-risk and expected shortfall allocations for credit portfolios. The Journal of Credit Risk. ISSN 1744-6619. 6(4).
• Price, Katie; Jackson, C. R.; Parker, A. J.; Reitan, Trond; Dowd, J. & Cyterski, Mike (2011). Effects of watershed land use and geomorphology on stream low flows during severe drought conditions in the southern Blue Ridge Mountains, Georgia and North Carolina, United States. Water Resources Research. ISSN 0043-1397. 47. doi: 10.1029/2010WR009340.
• Reitan, Trond & Petersen-Øverleir, Asgeir (2011). Dynamic rating curve assessment in unstable rivers using Ornstein-Uhlenbeck processes. Water Resources Research. ISSN 0043-1397. 47. doi: 10.1029/2010WR009504. Vis sammendrag

  We use a simple stochastic differential equation model known as the Ornstein-Uhlenbeck model to deal if unstable stage-discharge relationships in hydraulics. Rating curves parameters used for relating stage and discharge are now allowed to change as stochastic processes in time.

• Reitan, Trond & Aas, Kjersti (2010). A new robust importance-sampling method for measuring value-at-risk and expected shortfall allocations for credit portfolios. The Journal of Credit Risk. ISSN 1744-6619. 6(4), s. 113–149.
• Reitan, Trond & Aas, Kjersti (2010). A New Robust Importance Sampling Method for Measuring VaR and ES Allocations for Credit Portfolios. The Journal of Credit Risk. ISSN 1744-6619. 6(4). Vis sammendrag

  The paper explores different ways to estimate Value-at-Risk and similar financial measures using normal copula assumptions. We made a new method based on Markov chain Monte Carlo (MCMC), which we compared to the existing estimation methods and which turned out to work well. We also tried our method on t distribution copulas, and it still seemed to work well.

• Petersen-Øverleir, Asgeir & Reitan, Trond (2009). Bayesian analysis of stage-fall-discharge models for gauging stations affected by variable backwater. Hydrological Processes. ISSN 0885-6087. 23(21), s. 3057–3074. doi: 10.1002/hyp.7417.
• Petersen-Overleir, A & Reitan, Trond (2009). Accounting for rating curve imprecision in flood frequency analysis using likelihood-based methods. Journal of Hydrology. ISSN 0022-1694. 366(1-4), s. 89–100. doi: 10.1016/j.jhydrol.2008.12.014.
• Petersen-Øverleir, Asgeir; Soot, André & Reitan, Trond (2009). Bayesian Rating Curve Inference as a Streamflow Data Quality Assessment Tool. Water resources management. ISSN 0920-4741. 23(9), s. 1835–1842. doi: 10.1007/s11269-008-9354-5.
• Reitan, Trond & Petersen-Øverleir, Asgeir (2009). Bayesian methods for estimating multi-segment discharge rating curves. Stochastic environmental research and risk assessment (Print). ISSN 1436-3240. 23(5), s. 627–642. doi: 10.1007/s00477-008-0248-0.
• Reitan, Trond & Petersen-Øverleir, Asgeir (2008). Bayesian power-law regression with a location parameter, with applications for construction of discharge rating curves. Stochastic environmental research and risk assessment (Print). ISSN 1436-3240. 22. doi: 10.1007/s00477-007-0119-0.
• Burgess, Mark & Reitan, Trond (2007). A risk analysis of disk backup or repository maintenance. Science of Computer Programming. ISSN 0167-6423. 64, s. 312–331. doi: 10.1016/j.scico.2006.06.003.
• Reitan, Trond & Petersen-Overleir, A (2006). Existence of the frequentistic estimate for power-law regression with a location parameter, with applications for making discharge rating curves. Stochastic environmental research and risk assessment (Print). ISSN 1436-3240. 20, s. 445–453.
• Petersen-Øverleir, Asgeir & Reitan, Trond (2005). Objective Segmentation in Compound Rating Curves. Journal of Hydrology. ISSN 0022-1694. 311(1-4), s. 188–201.
• Petersen-Overleir, A & Reitan, Trond (2005). Uncertainty in flood discharges from urban and small rural catchments due to inaccurate head measurement. Nordic Hydrology. ISSN 0029-1277. 36.
• Burgess, Mark; Reitan, Trond; Haugerud, Hårek & Straumsnes, Sigmund (2002). Measuring system normality. ACM Transactions on Computer Systems. ISSN 0734-2071. 20(2), s. 125–160.

Se alle arbeider i Cristin

• Wilson, Connor J.; Reitan, Trond & Liow, Lee Hsiang (2023). Using linear stochastic differential equations to guide the search for the drivers of marine origination and extinction.
• Liow, Lee Hsiang; Reitan, Trond & Di Martino, Emanuela (2023). ESTIMATING COMPETITION AND ITS EFFECTS OVER MACROEVOLUTIONARY TIME SCALES.
• Reitan, Trond & Liow, Lee Hsiang (2022). ESTIMATING CHANGING RELATIVE ABUNDANCE IN FOSSIL COMMUNITIES.
• Saulsbury, James Gabriel; Parins-Fukuchi, Caroline; Reitan, Trond; Wilson, Connor J. & Liow, Lee Hsiang (2022). AGE-DEPENDENT EXTINCTION AND THE NEUTRAL THEORY OF BIODIVERSITY.
• Sydenham, Markus A. K.; Chipperfield, Joseph; Dupont, Yoko L.; Eldegard, Katrine; Hegland, Stein Joar & Madsen, Henning Bang [Vis alle 13 forfattere av denne artikkelen] (2022). Spatial predictions of pairwise plant-pollinator interactions.
• Tscheulin, Thomas; Tatas, Ch; Reitan, Trond & Nielsen, Anders (2018). Spatiotemporal variation in the visitation of melon flowers by bees.
• Nielsen, Anders; Reitan, Trond & Heiberg, Nina (2018). Optimal temperatur for honningbier i tunnel. Gartner Tidende. ISSN 0106-8393. 2018(4), s. 48–49.
• Nielsen, Anders; Reitan, Trond & Heiberg, Nina (2017). Optimal temperatur for honningbier i tunnel. Norsk frukt og bær. ISSN 1501-4584. 20(2), s. 20–21.
• Nielsen, Anders; Reitan, Trond & Tscheulin, Thomas (2017). Understanding the Unexplainable Nature of an Ecosystem Service.
• Nielsen, Anders; Reitan, Trond & Garratt, Michael (2016). The nature of unexplained variation in flower visitation data. If it wasn't complicated enough .
• Nielsen, Anders & Reitan, Trond (2016). Proper use of flower visitation data.
• Nielsen, Anders & Reitan, Trond (2016). The nature of unexplained variation in flower visitation data. If it wasn't complicated enough!
• Steinbakk, Gunnhildur Högnadóttir; Thorarinsdottir, Thordis Linda; Reitan, Trond; Schlichting, Lena; Hølleland, Sondre & Engeland, Kolbjørn (2016). Propagation of rating curve uncertainty in design flood estimation.
• Reitan, Trond & Nielsen, Anders (2015). The nature of unexplained variation in flower visitation data.
• Reitan, Trond & Nielsen, Anders (2015). The nature of unexplained variation in flower visitation data.
• Reitan, Trond (2015). The nature of unexplained variation in flower visitation data.
• Reitan, Trond (2015). Further revisiting the bivalve and brachiopod saga; beyond pairwise analysis.
• Reitan, Trond & Nielsen, Anders (2015). Do not divide count data with count data; a story from pollination ecology.
• Nygård, Ståle; Reitan, Trond; Clancy, Trevor; Nygaard, Vegard; BJØRNSTAD, JOHANNES & Tønnessen, Theis [Vis alle 8 forfattere av denne artikkelen] (2011). Identifying pathogenic signaling and regulatory networks by integrating microarray data with prior knowledge.
• Nygård, Ståle; Reitan, Trond; Clancy, Trevor; Nygaard, Vegard; BJØRNSTAD, JOHANNES & Tønnessen, Theis [Vis alle 8 forfattere av denne artikkelen] (2011). Identifying pathogenic signaling and regulatory networks by integrating microarray data with prior knowledge.
• Reitan, Trond; Schweder, Tore & Henderiks, Jorijntje (2010). Modelling Phenotypic Evolution by Stochastic Differential Equations. Vis sammendrag

  In this presentation, we described how to use layered linear stochastic differential equations to model evolutionary processes. This model family was used in order to analyse microfossil data spanning several tens of millions of years.

• Aas, Kjersti & Reitan, Trond (2009). A new robust importance sampling method for measuring VaR and ES allocations for credit portfolios.
• Reitan, Trond (2008). Reasoning Under Uncertainty. Vis sammendrag

  In this video series I describe probabilistic reasoning, or as I call it, reasoning under uncertainty. Several basic principles are described as well as the mathematical foundation and a few mathematical as well as categorical results are shown.

• Thorarinsdottir, Thordis Linda; Engeland, Kolbjørn; Lawrence, Deborah; Pedersen, Øyvind; Tveito, Ole Einar & Hellton, Kristoffer Herland [Vis alle 27 forfattere av denne artikkelen] (2018). Nytt rammeverk for flomestimering i Norge: Sluttrapport fra forskningsprosjektet FlomQ. Energi Norge. ISSN 978-82-436-1048-4.
• Steinbakk, Gunnhildur Högnadóttir; Thorarinsdottir, Thordis Linda; Reitan, Trond; Schlichting, Lena; Hølleland, Sondre & Engeland, Kolbjørn (2016). Progagation of rating curve uncertainty in design flood estimation. Norsk Regnesentral.
• Natvig, Bent; Gåsemyr, Jørund Inge & Reitan, Trond (2010). Bayesian assessment of availabilities and unavailabilities of multistate monotone systems. Matematisk institutt, Universitetet i Oslo. ISSN 0806-3842. Vis sammendrag

  In the present paper we consider a multistate monotone system of multistate components. Following a Bayesian approach, the ambition is to arrive at the posterior distributions of the system availabilities and unavailabilities to the various levels in a fixed time interval based on both prior information and data on both the components and the system. We argue that a realistic approach is to start out by describing our uncertainty on the component availabilities and unavailabilities to the various levels in a fixed time interval, based on both prior information and data on the components, by the moments up till order m of their marginal distributions. From these moments analytic bounds on the corresponding moments of the system availabilities and unavailabilities to the various levels in a fixed time interval are arrived at. Applying these bounds and prior system information we may then fit prior distributions of the system availabilities and unavailabilities to the various levels in a fixed time interval. These can in turn be updated by relevant data on the system. This generalizes results given in (Natvig and Eide 1987) considering a binary monotone system of binary components at a fixed point of time. Furthermore, considering a simple network system, we show that the analytic bounds can be slightly improved by straightforward simulation techniques.

• Reitan, Trond & Aas, Kjersti (2008). A new robust IS method for measuring VaR and ES allocations for credit portfolios. Norsk Regnesentral.

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