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.


Well done Dr. Descombes! @patrice_des you did it by far. @WSL_research @usys_ethzh [more]
02:53 PM - 21 Jun, 2018
Esse curso promete! 🌎☄️💥 [more]
02:50 PM - 21 Jun, 2018
Science as for art itself, should not always be beautiful. N.B.: beauty is subjective and context dependend 😉 [more]
06:07 PM - 20 Jun, 2018
[FW] Ecology mainly studied at small scales using traditional methods. They found a "large gulf between the scales at which phenomena are actually observed and the scales those observations ostensibly represent" interesting thoughts on scale issues in ecology [more]
11:59 AM - 16 Jun, 2018
[RE] @loic_pellissier @zwang2013 @NEZimmermann_ @GruenigMarc I love these pictures! 💪🏻
11:39 PM - 13 Jun, 2018
[FW] In further @KirstyMEdgar collaboration news, delighted our @NatureComms paper on using evolutionary models to open the black box of isotope vital effects was featured in their Living Ocean collection: [more] (our paper: [more]
09:52 PM - 12 Jun, 2018
[FW] We are looking to hire an admin coordinator and a training coordinator for a NSERC CREATE program on computational biodiversity sciences -- see details here: [more] -- must be bilingual (French/English)
08:23 PM - 12 Jun, 2018
Preparing for tomorrow’s seminar @idiv in Leipzig 🤯😬 At least 5 min are safe: [more] 🙈 [more]
08:13 PM - 12 Jun, 2018
[RE] @GGBC_GU @antonelli_lab @Naturvetenskap Congrats Tobi!
06:22 PM - 9 Jun, 2018
[FW] Some of the bee hotels installed in #Paris for the European project in urban ecology #BIOVEINS #urbanecology #biodiversity #urbangreen #biodiversa #bees #wasps #wsl #urbangreen [more]
09:13 PM - 8 Jun, 2018
01:01 PM - 7 Jun, 2018
„The simple fact of labeling someone as an expert increases the propensity for cognitive bias.“ [more]
07:58 AM - 4 Jun, 2018
The father curse dilema... “Is it better to find a mate that will ensure better survival of offspring during parental care or a mate that will confer genes that make the offspring more competitive later in life?” [more]
08:52 AM - 1 Jun, 2018
[FW] A fungus that turns infected ants into powerless ‘zombies’ has adapted to climate conditions in different locales by modifying its victims’ behaviour #ResearchHighlight [more]
09:21 AM - 31 May, 2018
[FW] No machine learning @nature... [more]
11:04 PM - 29 May, 2018
[FW] Não sei se vocês estão sabendo já, mas a Ciência Hoje está de volta! [more] Logo logo a Ciência Hoje das Crianças vai dar as caras também! #DivulgaçãoCientífica #CiênciaÉImportante #Ciência
12:24 PM - 29 May, 2018
Great course! Highly recommended! [more]
07:08 PM - 26 May, 2018
[FW] Somebody should come up with an R function 'lenght' that does the same as 'length'. Urgently. #rstats #coder
07:06 PM - 26 May, 2018
And an R-package starts to create shape. #GaSM technical meeting. @loic_pellissier @florianhartig looking forward! Thank you all! [more]
02:35 PM - 26 May, 2018
[FW] Very nice Faculty position in Switzerland for terrestrial ecology! [more]
11:37 AM - 23 May, 2018
[FW] Nice! Can be applied to paleontological, neontological, and to both extant and extinct phylogenies - Inferring Diversification Rate Variation From Phylogenies With Fossils by @JonSMitchell @rampaletienne & @dan_rabosky in @systbiol [more]
10:48 PM - 22 May, 2018
[FW] We share the planet with about 10 million species of #plants, #animals and #fungi. On today's #BiodiversityDay, we celebrate this incredible diversity of life on earth. A sustainable management of the world's #biodiversity is key to our own future. [more]
10:43 PM - 22 May, 2018
[RE] @ElenaHaeler 🧐🤔😄
10:41 PM - 22 May, 2018
Had to buy this Therizinosaurus after seeing it in a toys shop and checking that it was backed by scientific facts (though his head was prob. smaller and overall less cinematographic). See panicking little human for a size comparison. [more] [more]
12:11 PM - 22 May, 2018
[FW] The diversification of Iriarteeae palms followed the west-to-east surface uplift history of the Northern Andes: geological events within a single mountain range affects the geographical expansion and diversification of lineages. @GGBC_GU @antonelli_lab [more] [more]
08:30 AM - 22 May, 2018


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 felt 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 processes. 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. 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


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

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

cc Oskar Hagen

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

cc Oskar Hagen

Red Laos 2013

cc Oskar Hagen

Berg Dragonsaur Switzerland 2018

cc Oskar Hagen

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

ORCID iD icon 0000-0002-7931-6571 TwitterOskarHagen@hagen_oskar e-mailOskarHagen oskar@hagen.bio