Oskar Hagen, PhD, Biodiversity, Research, Science, Biology, Evolution, Ecology, Macroevolution, Macroecology, Conservation Biology, Computational Biology, Theoretical Biology, Informatics, mechanistic model, modeling, Fireflies, vagalume, Photopollution, Lightpollution, Hermetia, TreeSimGM, GaSM, ETHZ, WSL, UFSCar, Brazil, Switzerland, Hagen, Oskar.


Prof. Thiago Rangel @WSL_research talking about bridging different spatial and temporal specific processes. #mechanisticmodel #processbasedmodel #ecoevo Great talk! Pleasure to colaborate with you! Symposium on process-based models @loic_pellissier [more]
04:09 PM - 22 Oct, 2019
[FW] This scale model shows how mangrove forests protect the coast. Mangrove forests are an essential component of the coastal defense systems in many places in Vietnam. This simple model makes it very easy to understand [paper: [more] [gif: [more] [more]
04:16 PM - 21 Oct, 2019
[RE] @bellwoodlab @MikeMihalitsis @AustSocFishBiol @giulidonati11
09:37 AM - 16 Oct, 2019
[FW] Editorial: As the world continues to grapple with how to respond to climate change, biodiversity loss, persistent poverty, and poor health, Gandhi’s commitment to what we now call sustainability is perhaps more relevant today than in his own time. [more]
09:05 AM - 10 Oct, 2019
Wichtig zu wissen für den Wahlkampf #klimawahl [more]
01:52 PM - 8 Oct, 2019
[FW] Do you find the pictures too fuzzy? They are composed of as many pixels as the numbers of individuals of these #species left in the wild! [more] #wildlife [more]
07:12 AM - 3 Oct, 2019
[FW] Cenozoic climate cooling as well as clade competition for resources increased extinction rates in mackerel sharks, according to a new study that suggests both abiotic and biotic factors can influence the diversity of marine apex predators. In PNAS: [more] [more]
09:00 AM - 1 Oct, 2019
[FW] "Someone finds this new amazing method, and everybody leaps in and starts to use it. Then after a couple of years, people people put their hands up and say, “hang on, maybe we’re not using this new tech the right way”." @BobOHara [more]
08:08 PM - 26 Sep, 2019
[FW] Plate tectonics not only explains hopping hotspots in tropical marine biodiversity but also predicts the prevalence of species traits in tropical reef fish assemblages. New study! @giulidonati11 @hagen_oskar @loic_pellissier @CamilleAlbouy [more]
05:34 PM - 26 Sep, 2019
[FW] "We Don’t Need All the Answers to Make #Climate Policy Decisions" - ETH Zurich Professor Sonia Seneviratne @SISeneviratne Read more about this topic in the following @diplocourier article. [more] #UNGA [more]
09:00 PM - 25 Sep, 2019
The future of #Swiss Landscape Services. A 2081 projection under business as usual scenario show strong urbanization and it's trade-offs. Political and applied work, excited! @WSL_research @usys_ethzh @VMUSYS_ETH @StatSchweiz @UVEK #landscapeservices [more]
09:44 PM - 24 Sep, 2019
Finally some quantification! YouTube and user radicalization... consequences came faster than we could foresee.... and there might be more! [more] #YouTube #FarRight #FarLeft #outreach
01:42 PM - 28 Aug, 2019
[RE] @ClaudeAGarcia Place a link between international and national gov/media... this is having the biggest impact at the moment on national gov. doing something.
01:35 PM - 23 Aug, 2019
Bad News for Science. And how we say in Portuguese: "A coisa tá feia". Sad to see the short term policy increasing even more in Brazil.... [more]
08:55 AM - 21 Aug, 2019
[FW] Editorial: Researchers should draw inspiration from those who fought against nuclear weapon proliferation in the 1950s by asserting that supporting science is “not an issue of left versus right, but of the very survival and prosperity of humanity itself.” [more]
01:33 PM - 9 Aug, 2019
Why polyploid exceptionalism is not accompanied by reduced extinction rates. [more]
05:07 PM - 6 Aug, 2019
[FW] Our mixed Brownian motion -- Ornstein-Uhlenbeck model of brain and body mass evolution in mammals has now been published: Automatic generation of evolutionary hypotheses using mixed Gaussian phylogenetic models [more]
07:59 PM - 5 Aug, 2019
[RE] @elisabarretop @loic_pellissier @CamilleAlbouy @StoufferLab @tpoi @Fortin_LELab @KCazelles @WrdAppltns @sjleroux @Araujo_lab Congrats @CamilleAlbouy @loic_pellissier
08:01 AM - 30 Jul, 2019
Accomplished 1 week #sELDIG meeting in Prague hosted by David Storch. It was a honor to be part of it and looking forward to the work still to be done. Image: modelers subgroup at the Centre for Theoretical Studies @CharlesUniPRG Tks to @idiv coordinators and colaboradors. #GaSM [more]
07:06 PM - 28 Jul, 2019
[RE] @JBiogeography @LE_group_ETHWSL @loic_pellissier @WSL_research @ETH_en @usys_ethzh
05:34 PM - 28 Jul, 2019
[FW] joint work with Juliano Sarmento Cabral, @hagen_oskar @loic_pellissier, @squirrelbert, Mikael Pontarp and David Storch
05:29 PM - 28 Jul, 2019
[FW] From where the cold adapted flora of the Northern Hemisphere? Hagen et al. compiled evidences supporting an origination in the mid-latitude mountain ranges followed by a later colonization of the Arctic @LE_group_ETHWSL @loic_pellissier @hagen_oskar [more] [more]
05:29 PM - 28 Jul, 2019
[FW] #Humboldt special issue in @JBiogeography out now! - I briefly introduce the three publications I contributed to in a blog post here: [more] @SuzetteFlantua @hagen_oskar, special issue available here: [more] [more]
12:50 AM - 27 Jul, 2019
First paper from my PhD is out! 🙌 #geology #biology #paleoclimate #interdiciplinarity Mountain building, climate cooling and the richness of cold‐adapted plants in the Northern Hemisphere Big thanks to all collaborators ❤️ [more]
12:23 AM - 24 Jul, 2019
Reading [more] … brought me to a very neat blog explaining quickly the behind the scenes of colorful feathers: [more] @CornellBirds #birds [more]
02:54 AM - 28 Apr, 2019


Oskar Hagen

PhD candidate in Environmental Sciences at WSL and ETH Zürich

Areas of Expertise: Environmental Sciences, Conservation Biology and Informatics

Interests: I’m a Swiss-Brazilian citizen with a family divided by the Atlantic, born in Venezuela and raised in the countryside of Brazil. This background suits the nature of my interdisciplinary interests, which also forged an unusual career path. I first studied informatics in a 2 year formal technical education, then I graduated in Conservation Biology in Brazil. Later, I came to Switzerland and pursued my Master in Environmental Sciences at ETH. My master thesis was conducted at the theoretical biology group, with major in Ecology and Evolution at the department of integrative biology. After the Master’s I left Switzerland and worked on public and private sectors. Now I am back in the land as a PhD candidate in landscape ecology.

During my bachelor at UFSCar I collaborated with several research groups and gained experience on teaching, field work, data analysis and population dynamics modelling. At that point, 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 (a rare characteristic among insects). While monitoring firefly populations in Atlantic rain forests over the years I fell in love with these lightning bugs and became engaged in communicating and tackling Photopollution.

Throughout my Master`s at ETH, I enhanced my mathematical and modelling skills, specifically regarding speciation and extinction processes. We proposed a generalized model and evaluated the effects of different extinction and speciation processes on phylogenetic trees shape, trying to better understand macroevolutionary forces. Our results suggested an age-dependent speciation, and we also briefly discussed motivations and plausible biological implications of our findings. This research project developed to other scientific collaborations towards extinction processes 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). These projects strengthened my interest in better understanding biodiversity dynamics and consolidated my interest towards applied ecology and computational biology (still in love with the fireflies though!).

Away from academia, I conducted an internship at the forestry department of the Federal Office for the Environment in Switzerland (BAFU) and worked as a consultant in a conservation project in Laos. The project targeted the implementation of SN-REDD in two national protected areas in the South and was the first public-private partnership in the country. Later, in Belize, I got involved with a Swiss and a Belizean NGO. There I looked at conectivity and finantial independence of a mosaic of protected and sustainable use natural areas. Early 2015 I dove into an insect farm start-up project in Brazil, which is still operational with my partial involvement. Our plans are to reduce waste from other industrial sectors while providing organic fertilizer and alternative protein sources to fish and chicken production. I dream of a more sustainable and environmentally friendly animal feed production in comparison to the current soya and overexploited fishmeal production systems.

Licenses: Car and motorbike (international license); scuba diving (PADI advanced open water).

Hobbies: Photographing, observing nature (e.g. landscapes, wildlife and human beings), playing ukulele, painting/drawing, handcrafting and exploring new technologies.

Current Research

Currently I investigate the role of past environmental conditions and eco-evolutionary feedbacks in shaping biodiversity gradients. For this, I am developing a macroevolutionary computational mechanistic model called GaSM (stands for General Allele Simulation Model) in order to infer biodiversity patterns from historical environmental dynamics and better understand ecological and evolutionar (i.e. speciation and extinction) processes. With GaSM it is possible, for the first time, to test and create new hypothesis under a general framework (i.e. acting mutually at evolutionary and ecological temporal resolution) and quantify processes shaping the biodiversity patterns we observe today. For that I must additionaly compile and recreate paleoenvirolmental conditions as well as obtain empirical species distribution, traits and evolutionary histories. Ultimately, GaSM will inform on the ecosystem responses to global changes, and especially the loss of diversification potential for biodiversity. This may challenge current conservation practice, and move current concepts toward an increased focus on the conservation of evolutionary potential.


Portuguesemother tongue






Formal Education

07.2016 Now

PhD candidate in Environmental Sciences: Landscape Ecology

Swiss Federal Institute for Forest, Snow and Landscape Research, WSL, Switzerland
Swiss Federal Institute of Technology Zürich, ETH, Switzerland

  • Advisor: Prof. Dr. Loïc Pellissier

09.2010 09.2013

Master in Environmental Sciences: Ecology and Evolution

Swiss Federal Institute of Technology Zurich, ETH, Switzerland

03.2006 12.2009

Bachelor in Biology: Conservation Biology

Federal University of São Carlos - campus Sorocaba, UFSCAR, Brazil

01.2005 12.2007

Vocational and Technical Education: Informatics – Communications Networking

SENAI Swiss-Brazilian - Regional Department of São Paulo, SENAI/DR/SP, Brazil

Complementary Formation

03.2010 08.2010

Obligatory Swiss Military Service

Schweizer Armee

  • Function: ABC Korporal
  • Defense of Atomic, Biological and Chemical weapons and formation as Sub-official

01.1999 06.2004

Classical Guitar, Rhythmic and Musical theory

Municipal Music School of Porto Feliz, EMM, Brazil


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

Extracurricular Activities

06.2019 Now

Reviewer of journal Proceedings of the National Academy of Sciences of the United States of America (PNAS)

08.2018 Now

Reviewer of journal Ecography

02.2018 Now

Reviewer of journal Global Change Biology

06.2017 Now

05.2014 Now

Reviewer of journal Methods in Ecology and Evolution

10.2007 12.2009

Director and Founder of Academic Journal (Jornal OCASO)

Federal University of São Carlos - campus Sorocaba, UFSCAR, Brazil

  • Under the guidance of Prof. Dr. Monica Caron

05.2006 12.2009

Director of information at the Academic Center

Federal University of São Carlos - campus Sorocaba, UFSCAR, Brazil


cc Oskar Hagen

Above and Below Laos 2014

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Rock and Ice Heart Switzerland 2012

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Tarzan and Jane Portugal 2016

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The in and out side Zambia 2013

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Brown Laos 2014

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Rainbow Switzerland 2013

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Red Laos 2013

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Berg Dragonsaur Switzerland 2018

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Calm Forest Laos 2013

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Climby Switzerland 2017

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Float Laos 2013

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Lost and Found Tanzania 2017

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Small is Beautiful Brazil 2015


Movie Requiem for the American Dream (2015) PD Hutchison, K Nyks, JP Scott Movie Merchants of Doubt (2014) R Kenner Movie The Century of the Self (2002) A Curtis Movie The Light Bulb Conspiracy (2010) A Gibney Movie Zero Days (2016) C Dannoritzer Book The Enigma of Reason (2017) H Mercier, D Sperber Book The Code Book (1999) S Singh
ORCID iD icon 0000-0002-7931-6571 TwitterOskarHagen@hagen_oskar e-mailOskarHagen oskar@hagen.bio