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, gen3sis, gasm, ETHZ, WSL, UFSCar, Brazil, Switzerland, Hagen, Oskar.


#r tip 740. Change variable names in scope in #rstudio Code>Rename in Scope or CTRL+ALT+SHITT+M [more]
10:57 AM - 28 Apr, 2020
[RE] @fabian_fopp @jea9brant and another one, indoors with R [more]
12:18 PM - 22 Apr, 2020
[RE] @fabian_fopp @jea9brant Here we go! A picture from this day! [more]
12:16 PM - 22 Apr, 2020
[RE] @fabian_fopp @jea9brant Let's see what I find from this day
05:26 PM - 9 Apr, 2020
I know this place <3 Amazing picture man. Let's do it again after covid ;)
05:25 PM - 9 Apr, 2020
This home office time is making me rethink eating and sport habits. Use this time to reorganize projects and schedules if you can. #stayhealthy #covid19 #shareEGU20 #StayHome
02:57 PM - 9 Apr, 2020
[FW] Tanja Stadler and her research group at @BSSE_ETH have developed a statistical model to analyse the genetic genealogy of pathogens. She thus gained new insights into the beginnings of the #coronaepidemic in China. #coronavirus #covid19 [more]
10:27 PM - 12 Mar, 2020
PSI has issued a priority access call for work on combating COVID-19. [more] NSF has issued a special call for rapid support for research into coronaviruses and their impact. Deadline 25 March. [more] #CODVID19 #CODVID19switzerland
03:14 PM - 11 Mar, 2020
[RE] @elisabarretop Aewwwwwww
08:46 AM - 11 Mar, 2020
Soil bacterial #diversity mechanistically modeled. Huge work going deeper into the why's and how's of soil diversity. Diversity is highest at intermediate water contents (disconnected habitats) with carrying capacity determining occupancy [more] #model #soil
11:43 AM - 31 Jan, 2020
Allopathy for small spatial but large temporal #scale. The case of tinny #bugs #speciation 🐞⛰️ Nice paper about speciation within islands! @Brent_C_Emerson [more]
07:28 PM - 27 Nov, 2019
Nice read. Great perspective on observed "ongoing" speciation. Partial reproductive isolation as a selective optimum and thus stable under certain conditions! @servedio1 #biology [more]
09:12 AM - 20 Nov, 2019
Nice 15 min read summary on deep learning... this example is scary: [more] [more]
09:09 AM - 15 Nov, 2019
Simple model for big questions! 🌎 💻 🧮 @WSL_research @ETH_en #modeling #ecoevo #ldg #biodiversity [more]
12:10 PM - 14 Nov, 2019
More on biodiversity loss, its consequences and the importance of scale. #science #biodiversity [more]
10:24 PM - 13 Nov, 2019
[RE] @saraloefqvist @JabouryGhazoul @NatureEcoEvo Congrats!!! *.*
10:03 PM - 13 Nov, 2019
The ancestors of fireflies observed by a unknown and now extinct reptile about 140 Ma (million years ago) #drawing #drawingsketch #firefly #dinosaurs #insects #palentology #paleo #science #evolution #MRCA [more]
09:12 PM - 12 Nov, 2019
[RE] @SerpenIllus Beautiful art. Nice and funny to see the “freeriders”, they play with the proportions nicely
09:08 AM - 31 Oct, 2019
[RE] @RangerNutkin @BBCSpringwatch 🤦🏻‍♂️
10:29 PM - 30 Oct, 2019
[FW] My latest: The judge who laid down the legal architecture needed to establish Israel's settlements has just died. But his legacy has inspired a fresh generation of jurists to create new mechanisms for dispossessing the Palestinians [more]
08:08 AM - 28 Oct, 2019
[FW] Can peer review keep up? [more]
07:44 PM - 27 Oct, 2019
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


Oskar Hagen

PhD candidate
Environmental Systems Science
WSL and ETH Zürich

Areas of Expertise: Environmental Sciences, Conservation Biology and Informatics

Background: I’m a Swiss-Brazilian citizen with a family divided by the Atlantic, born in Venezuela and raised in the countryside of Brazil. The interdisciplinary 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 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 gen3sis (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 gen3sis 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, gen3sis 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


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

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

cc Oskar Hagen

Rock and Ice Heart Switzerland 2012

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Tarzan and Jane Portugal 2016

cc Oskar Hagen

The in and out side Zambia 2013

cc Oskar Hagen

Brown Laos 2014

cc Oskar Hagen

Rainbow Switzerland 2013

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Red Laos 2013

cc Oskar Hagen

Berg Dragonsaur Switzerland 2018

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Calm Forest Laos 2013

cc Oskar Hagen

Climby Switzerland 2017

cc Oskar Hagen

Float Laos 2013

cc Oskar Hagen

Lost and Found Tanzania 2017

cc Oskar Hagen

Small is Beautiful Brazil 2015


Book Spillover (2012) D Quammen 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 Publons AAD-9453-2019 TwitterOskarHagen@hagen_oskar MastodonOskarHagen@hagen_oskar e-mailOskarHagen oskar@hagen.bio