Dr. Oskar Hagen, Ph.D, Biodiversity, Research, Science, Biology, Evolution, Ecology, Macroevolution, Macroecology, Conservation Biology, Computational Biology, Theoretical Biology, Informatics, mechanistic model, Eco-evolutionary modelling, eco-evo, process-based, biodiversity modelling, Fireflies, vagalume, Photopollution, Lightpollution, Hermetia, TreeSimGM, gen3sis, gasm, ETHZ, WSL, iDiv, UFZ, UFSCar, Brazil, Germany, Switzerland, Hagen, Oskar.
PostDoc at iDiv, German Centre for Integrative Biodiversity Research
The interdisciplinarity of my interests forged an unusual career path. I first studied informatics in a 2 year formal technical education, then I graduated in Conservation Biology where I investigated and quantified the effects of artificial illumination at firefly’s populations. I proposed fireflies as potential flagship species and bioindicators for artificial ilumination once they can be easily spotted at night and are charismatic. During my master I proposed a generalized model and evaluated the effects of different extinction and speciation processes on phylogenetic trees shape, suggesting an age-dependent speciation with implications from a conservation and macroevolutionary/paleontological perspective. Yielding a few publications, an R-package TreeSimGM (simulates phylogenies) and the expansion of the software PyRate (estimates macroevolutionary rates from fossil data using a Bayesian framework).
After working in the public and private sectors I obtained my Doctor of Science, where I investigated the role of past environmental conditions and eco-evolutionary feedbacks on the emergence of biodiversity. I developed an eco-evolutionary simulation framework called gen3sis, available as an R-package. Combining it with new paleoenvironmental reconstructions and multiple biodiversity data sources, I use it to tackle a few of the many, now unlocked and potentially addressable, scientific questions.
My research focus is on spatial and temporal patterns of biodiversity, particularly using population-based spatially explicit mechanistic eco-evolutionary models (aka MEEMs) to simulate emergent life patterns.
This involves using population and community ecology, macroecology, biogeography, historical ecology, evolution, macroevolution, paleontology, geology and climatology.
Consequently, using MEEMs, I work on quantifying ecological, evolutionary and multiple deep-time dynamic environmental factors such as plate tectonics on shaping Biodiversity.
To access the role of environmental and eco-evolutionary feedbacks in shaping biodiversity, I test and create eco-evolutionary hypothesis by applying computational models, i.e. MEEMs such as gen3sis : General Engine for Eco-Evolutionary Simulations - avaiable as an R-package. In combination with paleo-envirolmental, empirical species distribution, traits and evolutionary histories data, this approach provide us a better understanding of ecological and evolutionary (i.e. speciation and extinction) processes that shape(d) multiple biodiversity patterns.
Ultimately, this can inform on the ecosystem responses to global changes, and especially the loss of diversification potential for biodiversity as well as how macro-dynamics most likely responded in the deep past. This may challenge current conservation practice, and move current concepts toward an increased focus on the conservation of evolutionary potential. For more on the topic see the blogs: Theoretical Ecology, The Century of Biology and 微信. For more on two recent publications, see iDiv press release or some of my latest publications publications.
Doctor of Sciences: Environmental Sciences
Swiss Federal Institute of Technology Zürich, ETH, Switzerland
Swiss Federal Institute for Forest, Snow and Landscape Research, WSL, Switzerland
Master in Environmental Sciences: Ecology and Evolution
Swiss Federal Institute of Technology Zurich, ETH, Switzerland
Bachelor in Biology: Conservation Biology
Federal University of São Carlos - campus Sorocaba, UFSCAR, Brazil
Vocational and Technical Education: Informatics – Communications Networking
SENAI Swiss-Brazilian - Regional Department of São Paulo, SENAI/DR/SP, Brazil
A Skeels, LM Boschman, IR McFadden, EM Joyce, O Hagen, O Jiménez Robles, W Bach, V Boussange, T Keggin, W Jetz, L Pellissier (2023) Paleoenvironments shaped the exchange of terrestrial vertebrates across Wallace’s Line. Science
O Hagen (2023) Coupling eco-evolutionary mechanisms with deep-time environmental dynamics to understand biodiversity patterns. Ecography
X Li, X Xiang, F Jabbour, O Hagen, RC Ortiz, PS Soltis, DE Soltis, W Wang (2022) Biotic colonization of subtropical East Asian caves through time. PNAS
A Skeels, W Bach, O Hagen, W Jetz, L Pellissier (2022) Temperature-dependent evolutionary speed shapes the evolution of biodiversity patterns across tetrapod radiations. Systematic Biology
L Lyu, F Leugger, O Hagen, F Fopp, LM Boschman, JS Strijk, C Albouy, DN Karger, P Brun, Z Wang, NE Zimmermann, L Pellissier (2022) An integrated high‐resolution mapping shows congruent biodiversity patterns of Fagales and Pinales. New Phytologist
O Hagen*, A Skeels*, RE Onstein, W Jetz, L Pellissier (2021) Earth history events shaped the evolution of uneven biodiversity across tropical moist forests. PNAS
GFA Donati, N Zemp, S Manel, M Poirier, T Claverie, F Ferraton, T Gaboriau, R Govinden, O Hagen, S Ibrahim, D Mouillot, J Leblond, P Julius, L Velez, I Zareer, A Ziyad, F Leprieur, C Albouy, L Pellissier (2021) Species ecology explains the spatial components of genetic diversity in tropical reef fishes. Proceedings of the Royal Society B: Biological sciences
LM Boschman, FAS Cassemiro, L Carraro, J deVries, F Altermatt, O Hagen, C Hoorn, L Pellissier (2021) South American freshwater fish diversity shaped by Andean uplift since the Late Cretaceous. bioRxiv
O Hagen, B Flueck, F Fopp, JS Cabral, F Hartig, M Pontarp, TF Rangel, L Pellissier (2021) gen3sis: A general engine for eco-evolutionary simulations of the processes that shape Earth’s biodiversity. PLoS biology
A Eyres, JT Eronen, O Hagen, K Böhning‐Gaese, SA Fritz (2021) Climatic effects on niche evolution in a passerine bird clade depend on paleoclimate reconstruction method. Evolution
G Yannic, O Hagen, F Leugger, D.N. Karger, L Pellissier (2020) Harnessing paleo-environmental modeling and genetic data to predict intraspecific genetic structure. Evolutionary Applications
GFA Donati, V Parravicini, F Leprieur, O Hagen, T Gaboriau, C Heine, M Kulbicki, J Rolland, N Salamin, C Albouy, L Pellissier (2019) A process‐based model supports an association between dispersal and the prevalence of species traits in tropical reef fish assemblages. Ecography
M Gerecke*, O Hagen*, J Bolliger, AM Hersperger, F Kienast, B Price, L Pellissier (2019) Assessing potential landscape service trade-offs driven by urbanization in Switzerland. Palgrave Communications
O Hagen, L Vaterlaus, C Albouy, A Brown, F Leugger, RE Onstein, C Novaes de Santana, CR Scotese, L Pellissier (2019) Mountain building, climate cooling and the richness of cold‐adapted plants in the Northern Hemisphere. Journal of Biogeography
RS Etienne, JS Cabral, O Hagen, F Hartig, AH Hurlbert, L Pellissier, M Pontarp, D Storch (2019) A minimal model for the latitudinal diversity gradient suggests a dominant role for ecological limits. The American Naturalist
M Pontarp, L Bunnefeld, JS Cabral, RS Etienne, SA Fritz, R Gillespie, CH Graham, O Hagen, F Hartig, S Huang, R Jansson, O Maliet, T Münkemüller, L Pellissier, TF Rangel, D Storch, T Wiegand, AH Hurlbert (2019) The latitudinal diversity gradient: Novel understanding through mechanistic eco-evolutionary models. Trends in Ecology and Evolution
BH Warren, O Hagen, F Gerber, C Thébaud, E Paradis, E Conti (2018) Evaluating alternative explanations for an association of extinction risk and evolutionary uniqueness in multiple insular lineages. Evolution
L Pellissier, P Descombes, O Hagen, L Chalmandrier, G Glauser, A Kergunteuil, E Defossez, S Rasmann (2018) Growth-competition-herbivore resistance trade-offs and the responses of alpine plant communities to climate change. Functional Ecology
O Hagen, T Andermann, TB Quental, A Antonelli, D Silvestro (2017) Estimating age-dependent extinction: contrasting evidence from fossils and phylogenies. Systematic Biology
EO Hagen, O Hagen, JD Ibáñez-Álamo, OL Petchey, KL Evans (2017) Impacts of urban areas and their characteristics on avian functional diversity. Frontiers in Ecology and Evolution
O Hagen, T Stadler (2017) TreeSimGM: Simulating phylogenetic trees under general Bellman-Harris models with lineage-specific shifts of speciation and extinction in R. Methods in Ecology and Evolution
O Hagen, K Hartmann, M Steel, T Stadler (2015) Age-dependent speciation can explain the shape of empirical phylogenies. Systematic Biology
O Hagen, RM Santos, MN Schlindwein, VR Viviani (2015) Artificial night lighting reduces firefly (Coleoptera: Lampyridae) occurrence in Sorocaba, Brazil. Advances in Entomology
VR Viviani, MY Rocha, O Hagen (2010) Bioluminescent beetles (Coleoptera: Elateroidea: Lampyridae, Phengodidae, Elateridae) in the municipalities of Campinas, Sorocaba-Votorantim and Rio Claro-Limeira (SP, Brazil): biodiversity and influence of urban sprawl. Biota Neotropica
Member of Fireflyers International Network
Nature Ecology and Evolution;
Proceedings of the National Academy of Sciences of the United States of America (PNAS);
Bulletin of Mathematical Biology;
Global Change Biology;
Geoscientific Model Development;
Global Ecology and Biogeography;
Journal of Biogeography;
Methods in Ecology and Evolution;
Director and Founder of Academic Journal (Jornal OCASO)
Director of information at the Academic Center
Above and Below Laos 2014
Rock and Ice Heart Switzerland 2012
Tarzan and Jane Portugal 2016
The in and out side Zambia 2013
Brown Laos 2014
Rainbow Switzerland 2013
Red Laos 2013
Berg Dragonsaur Switzerland 2018
Calm Forest Laos 2013
Climby Switzerland 2017
Float Laos 2013
Lost and Found Tanzania 2017
Small is Beautiful Brazil 2015