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Marcel E. Visser

@mevisser.bsky.social
548 followers 76 following 17 posts

Evolutionary ecologist working on how species adapt to their changing world. Lead PI of LTER-LIFE, an infrastructure to build Digital Twins of ecosystems. Head of the Animal Ecology departement at NIOO-KNAW and professor at Groningen University.

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Reposted by Marcel E. Visser
EMPSEB 31 @empseb.bsky.social · 15/10/2026
We are thrilled to announce that the 32nd edition of the European Meeting for PhD students in Evolutionary Biology (EMPSEB) will be held in Slovenia! More details coming soon. Follow us to stay updated!
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Marcel E. Visser @mevisser.bsky.social · 12/10/2026
Many thanks to @sevans.bsky.social and @erikpostma.bsky.social for leading this. Excellent paper!
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Marcel E. Visser @mevisser.bsky.social · 12/10/2026
Fifty years over beech seed production. Started by Hans van Balen and now cleaned up and made FAIR by Cherine Jantzen. Great work Cherine! And the 51st survey has been done already.
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Reposted by Marcel E. Visser
Barbara Tschirren @btschirren.bsky.social · 10/10/2026
Interested in the ecological consequences of gamebird releases? Join us for a 3.5-year PhD project @exeter.ac.uk and @uniexecec.bsky.social. This project will investigate how gamebird releases affect (a) tick abundance and tick-borne disease risk (Lyme disease), and (b) reptile populations.
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NL Institute of Ecology NIOO-KNAW @niooknaw.bsky.social · 24/09/2026
New publication: Additive effects of environmental and demographic variation shape the repeatability of #evolution across replicated experiments, by @kjfverhoeven.bsky.social @mevisser.bsky.social and others. #naturalselection #microbiome doi.org/10.1093/evle...
Figure 1 in Bisschop et al. (2026): "Environmental and demographic stochasticity. All institutes (institute A and B) performed an identical evolutionary experiment where C. elegans and microbial communities evolved on a novel resource, the primary treatment (Tr. 1). The controlled conditions during the experiments (temperature and other climate attributes, as well as food source) were kept similar (indicated with the thermometer symbol), but the uncontrolled conditions were different (e.g., institute microbiota in different colours, and institute handling routines as symbolised with the hand icons), resulting in environmental heterogeneity across institutes. Furthermore, all institutes except one conducted a second treatment (Tr. 2) which differed between institutes and resulted in demographic heterogeneity across treatments."
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Marcel E. Visser @mevisser.bsky.social · 23/09/2026
Great that this interesting paper is out now! Many thanks to @sevans.bsky.social for all his hard work on this. Nice example of the value of long term studies!
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Marcel E. Visser @mevisser.bsky.social · 07/08/2026
Very pleased that this paper is out now. The LTER-LIFE infrastructure will help you to build your digital twin, check out the LTER-LIFE Experience webpage.
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Reposted by Marcel E. Visser
eLTER @elter-ri.eu · 16/07/2026
LTER-Bulgaria International Conference extends abstract submission deadline to 3 August 2026! Accepted abstracts will be published with a DOI in the @arphahub.com collection "Long-Term Ecosystem Research: Contributions, Challenges and Future Perspectives". Read more: www.elter-ri.eu/news/lter-bu...
elter-ri.eu
LTER Bulgaria International Scientific Conference 2026: Registration and Abstract Submission are Now Open
The International Scientific Conference of the Bulgarian Long-Term Ecosystem Research Network (LTER-BG) will take place on 14–17 October 2026 at Hotel Cherno More in Varna, Bulgaria.Under the title “L...
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Marcel E. Visser @mevisser.bsky.social · 19/06/2026
Thanks to Cherine Jantzen for leading this!
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Reposted by Marcel E. Visser
NL Institute of Ecology NIOO-KNAW @niooknaw.bsky.social · 05/06/2026
We are looking for a PhD candidate to model the impact of light at night on urban food webs: join a project on aquatic–terrestrial coupling of trophic interactions in urban ecosystems. Apply by 15 June: nioo.knaw.nl/en/vacancies...
nioo.knaw.nl
PhD position: modelling the impact of light at night on urban food webs
We are looking for a PhD candidate to join a project on aquatic–terrestrial coupling of trophic interactions in urban ecosystems. The project focuses on understanding how environmental changes, partic...
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Melissah Rowe @melissahrowe.bsky.social · 05/06/2026
🐦 Interested in avian reproduction, microbiomes, or reproductive microbiomes? I'm looking for outstanding early-career researchers interested in applying for an NWO Veni grant to join my group at NIOO. Pre-proposals are due after the summer. Email me to discuss ideas. #EarlyCareerResearcher #Postdoc
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NL Institute of Ecology NIOO-KNAW @niooknaw.bsky.social · 05/06/2026
We are looking for a PhD candidate to study mast seeding dynamics in beech. Are you excited about belowground ecology and combining long-term ecological data, soil ecology, and predictive modelling to understand how forests respond to global change? Apply by 21 June: nioo.knaw.nl/en/vacancies...
nioo.knaw.nl
PhD position: aboveground-belowground linkages in beech masting dynamics
Every day, hidden ecological processes unfold right below our feet. Are you excited about belowground ecology and interested in combining long-term ecological data, soil ecology, fieldwork, and predic...
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NL Institute of Ecology NIOO-KNAW @niooknaw.bsky.social · 04/06/2026
Do you want to use your experience with AI to help ecological research? The Netherlands Institute of Ecology is looking for an AI engineer in ecology. Interested? Or know someone who is? Apply to the vacancy by 14 June: nioo.knaw.nl/en/vacancies...
nioo.knaw.nl
AI engineer in ecology
The Animal Ecology Department has several ongoing data and software-related projects that already integrate AI, LLM, and machine learning approaches into our work. Many of these projects will benefit ...
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Barbara Tschirren @btschirren.bsky.social · 21/05/2026
We are recruiting 🌟2 postdoctoral researchers🌟 for a NERC Large Grant project on the eco-evolutionary dynamics of badger - bovine tuberculosis (bTB) interactions.
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NL Institute of Ecology NIOO-KNAW @niooknaw.bsky.social · 10/04/2026
New publication: Putting #FAIR into practice for #ecologists: How to make #ecological #data more #reusable, by @stefanvriend.bsky.social and others. doi.org/10.1016/j.ec...
Figure 1 Jantzen (2026): A general workflow to make data more FAIR and structured. Colours refer to the data components introduced in section 2.2 (pink = metadata, blue = storage, green = standards, orange = structure). The numbers refer to the steps in the main text. The workflow can be used for any type of data and can be entered at any point, depending on which data components a user wants to improve.
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Marcel E. Visser @mevisser.bsky.social · 25/03/2026
The breeding season 2026 has started, our 72nd breeding season!
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Groningen Institute for Evolutionary Life Sciences @gelifes.bsky.social · 05/03/2026
📢 Hiring: Tenure Track Professor of Flyway Ecology & Scientific Director of BirdEyes, the Centre for Global Ecological Change Apply before 31 Mar 👇 werkenbij.rug.nl/vacature/ten... #Hiring #Vacancy #ScienceJobs #SciComm
werkenbij.rug.nl
Tenure Track Assistant/Associate/Full Professor Flyway Ecology, Scientific Director of BirdEyes, Centre for Global Ecological Change - Rijksuniversiteit Groningen
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Melissah Rowe @melissahrowe.bsky.social · 04/03/2026
Abstract submission may be closed, but it is not too late to sign up to attend the NLSEB Annual meeting. Great plenary talks and a great line up of talks and posters. And thanks to our sponsors NWO and @isme-microbes.bsky.social for helping making this meeting possible.
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NL Institute of Ecology NIOO-KNAW @niooknaw.bsky.social · 23/02/2026
New publication: Supplemental #feeding as #experimental #tool to understand why #birds do not #lay earlier in the #season, by @mevisser.bsky.social and others. doi.org/10.1002/jav....
Figure 1 Both (2026): (a) Correlation between the annual average hatching date and the date of the caterpillar peak (open dots are experimental years: 2015 (intermediate in caterpillar peak date of the three experimental years), 2021 (latest caterpillar peak date) and 2022 (earliest caterpillar peak date), (b) the interval between arrival and laying in response to the caterpillar peak, (c) the annual strength of selection on laying date, measured as the linear slope of standardized laying date on relative fitness (measured as the number of locally recruiting offspring per female) (open dots are experimental years: 2015, 2021 and 2022), (d) example of the correlation between individual interval between arrival and laying in response to variation in arrival date for two experimental years: blue triangles: 2021, a cold spring, and red dots: 2022, a relatively warm spring.
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Beatriz Taboada @bibi-tabs.bsky.social · 18/02/2026
Looking for a student to develop a project on house sparrow behaviour and badge size! This project would include field work on the lovely Lundy Island in the Uk. For more information: nioo.knaw.nl/en/vacancies...
nioo.knaw.nl
Investigating behaviour and badge size in House sparrows (International fieldwork internship/thesis)
I am looking for a motivated Masters or HBO student to take part in the upcoming field season in the United Kingdom. Fieldwork will take place between April and May 2026 for 1.5 months on Lundy Island...
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Reposted by Marcel E. Visser
NL Institute of Ecology NIOO-KNAW @niooknaw.bsky.social · 13/02/2026
New publication: Changes in #phenology mediate #vertebrate #population responses to #temperature globally, by @stefanvriend.bsky.social, @mevisser.bsky.social, and others. doi.org/10.1038/s414...
Figure 2 Radchuk (2026): A selection of studied species is shown, with each inset giving information for that species on its generation time (T, in years; also depicted by the black bar next to it), its diet (carnivore: C, herbivore: H, and omnivore: O) and whether the species is a migrant (M) or a resident (R). The inset shows the number of studies per taxon and trait category. Illustration credits for the species pictures taken from Wikipedia: Svalbard reindeer—Bjørn Christian Tørrissen, four-striped grass mouse—C.R. Selvakumar, silver gull—JJ Harrison, snow petrel—Samuel Blanc, northern giant petrel—Liam Quinn, green turtle—Brocken Inaglory, green-rumped parrotlet—Jam.mohd, Columbian ground squirrel—Martin Pot, red-winged fairy-wren—John Anderson, grey-headed albatross—John Harrison. Two species pictures were provided by the co-authors of this study: painted turtle (credit: FJ) and Atlantic yellow-nosed albatross (credit: SOp). The remaining pictures were taken from Pixabay (https://pixabay.com/photos/).
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NL Institute of Ecology NIOO-KNAW @niooknaw.bsky.social · 12/02/2026
New publication: Female #chronotype relates to lay date but not #fitness in an island population of great tits, by @aureliastrauss.bsky.social, @babimt.bsky.social, @mevisser.bsky.social, and others. #greattits #laydate doi.org/10.1007/s004...
Source: Oldiefan, Pixabay (CC0)
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Tommaso Jucker @tommaso-jucker.bsky.social · 12/02/2026
🚨3 Lectureships in Biology 🚨 Come join us in Bristol @bristolbiosci.bsky.social! We are looking for new collegues working across a broad spectum of topics in biology, including ecology & environmental change. Get in touch if you have Qs! Apply here by 8 March: www.bristol.ac.uk/jobs/find/de...
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Marcel E. Visser @mevisser.bsky.social · 26/01/2026
Well done @aureliastrauss.bsky.social Glad this is out now.
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Marcel E. Visser @mevisser.bsky.social · 20/01/2026
Thanks Viktoriia for leading this excellent project.
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Edward Grey Institute @egioxford.bsky.social · 16/01/2026
🚨🚨🚨 Field Assistant positions - four of them!! - working with the long-term Wytham project this coming spring. Details below. Previous year's field team - come and join us! Details below ⬇️
2025 Wytham Tit Project field team
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Infect-Net @infect-net.bsky.social · 05/01/2026
The University of Vienna awards at least 20 four-year and full-time (40h/week) postdoctoral positions to outstanding female scientists in natural sciences, life sciences, and economics.
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Patrick Jansen 🐾 @patrickjansen.bsky.social · 07/01/2026
Are you a PhD-level #wildlife ecologist committed to research and education for #biodiversity and nature restoration? Our group at @utrechtuniversity.bsky.social has a #vacancy for an assistant professor! Deadline for applications is February 19. Please spread the word. www.uu.nl/en/organisat...
Restoring nature and reversing biodiversity loss are urgent societal challenges. Utrecht University invites applications for an Assistant Professor in Wildlife Ecology and Nature Restoration. In this role, you contribute to help solve these challenges through research and education by linking fundamental wildlife ecology to biodiversity recovery and nature restoration.

As an Assistant Professor, you will join a young, enthusiastic team that is eager to make an impact. You will help strengthen the team’s mission to connect fundamental wildlife ecology with the challenges of nature restoration in human-dominated multifunctional forest landscapes, especially in north-western Europe. 

Your research will focus on restoration-relevant themes, such as wildlife responses to anthropogenic change, the effectiveness of conservation interventions, and the contribution of wildlife to biodiversity recovery and nature restoration. Close collaboration with colleagues within and beyond Utrecht University is an important part of this role, as well as building sustainable partnerships with conservation practitioners and policymakers. 

You will combine fieldwork, experiments and biomonitoring (e.g. using sensor technologies) with laboratory, statistical and theoretical approaches. There is ample opportunity to initiate research projects and to acquire funding. 

In education, you will teach in the Biology programs, develop and coordinate a new course, and supervise research projects of BSc, MSc and PhD students.
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Erik Svensson @evolodonata.ecoevo.social.ap.brid.gy · 20/12/2025
Come and join me and my colleagues at the Department of Biology, #LundUniversity in #sweden! We have am open position as Senior Lecturer/Associate Professor in Biodiversity. Apply here no later than February 11 2026: lu.varbi.com/en/what:job/jobID:8487…
lu.varbi.com
Senior Lecturer/Associate Professor in Biodiversity
The Department of Biology was established in 2010 through the merger of the Departments of Ecology, Cell and Organism Biology, Biological Undergraduate Education, and the Biological Museums. The depar
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Steffen Oppel @steffopp.bsky.social · 23/12/2025
NEW JOB in #ornithology with @vogelwarte.bsky.social to unravel the demographic drivers of population change in Alpine #swifts in #Switzerland: buff.ly/crV1rT8
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Hanna Kokko @kokkonut.bsky.social · 12/12/2025
Empseb is simply the best. If you're a PhD student of evolutionary biology, do go there!
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NL Institute of Ecology NIOO-KNAW @niooknaw.bsky.social · 12/12/2025
New publication: Dimming #streetlights in urban areas reduces #insect attraction but pipistrelle #bats forage more in darkness, by @mevisser.bsky.social and others. #ALAN #foraging #lightpollution doi.org/10.1016/j.bi...
Figure 1 in Buddendorf et al. (2025): "Nightly counts of flying insects (left), pipistrelle bat passes (middle) and their feeding buzzes (right) per treatment (dark control: 0.16 ± 0.03 lx, low: LED 3000 K, 4.4 ± 1.4 lx, high: LED 3000 K, 17 ± 3.8 lx). Significance levels indicated as ns: p > .05, ***: p < .001."
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EOU Fledglings @eoufledglings.bsky.social · 09/11/2025
The date is set for the next EOU Fledglings Meeting 🐥 in Gdansk, Poland! Share the news with your peers! 🦆
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NL Institute of Ecology NIOO-KNAW @niooknaw.bsky.social · 21/11/2025
New publication: Phenological Plasticity and Its #Temperature-Related Drivers in Common #Songbirds Across Europe. #climatechange #phenology doi.org/10.1111/gcb....
Figure 1 in Cuchot et al. (2025): "Locations of constant capture effort sites (CES). Colors represent the number of years of monitoring per site. Map lines delineate study areas and do not necessarily depict accepted national boundaries."
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Dr. Emily G Simmonds @emilygsimmonds.bsky.social · 12/11/2025
Are you involved in ecological forecasting or prediction in Europe? We’re mapping forecasting applications across the continent — from SDMs to observatories with predictive potential. Submit here 👉 euro-ecoforecast.wordpress.com/forecasting-... #EcologicalForecasting #EEFI #OpenScience
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Barbara Tschirren @btschirren.bsky.social · 12/11/2025
*PhD opportunity @uniexecec.bsky.social* How does antimicrobial resistance spread through ecosystems? Combine fieldwork (rodent trapping 🐭, habitat surveys 🌳, pheasant sampling 🦤), molecular techniques, GIS, and spatial modelling to understand AMR evolution and spread. 🔬🦠🧪 Please repost!
shorturl.at
Antimicrobial Resistance (AMR) in Gamebirds: A One Health Approach to Understanding and Mitigating the Risk of AMR Evolution and Spread through Ecosystems at University of Exeter on FindAPhD.com
PhD Project - Antimicrobial Resistance (AMR) in Gamebirds: A One Health Approach to Understanding and Mitigating the Risk of AMR Evolution and Spread through Ecosystems at University of Exeter, list...
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Marcel E. Visser @mevisser.bsky.social · 30/10/2025
There are two LTER platforms in the Netherlands: Veluwe and Wadden Sea. See www.lter-nl.nl and www.lter-life.nl
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NL Institute of Ecology NIOO-KNAW @niooknaw.bsky.social · 28/10/2025
PhD candidate #vacancy alert: Insect species that overwinter as eggs are particularly vulnerable to climate change. We are looking for a PhD candidate to collect more data to predict whether these insects can adapt to climate change. Read the vacancy on our website: nioo.knaw.nl/en/vacancies...
nioo.knaw.nl
PhD Seasonal Timing of Egg Overwintering Insects under Climate Change
Climate change is exerting strong selection on wild populations, with many species showing shifts in the seasonal timing of development. One particularly vulnerable group are insect species that overw...
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Marcel E. Visser @mevisser.bsky.social · 24/10/2025
Excellent project led by @disnatalie.bsky.social Come and work with us at @niooknaw.bsky.social @animalecol-nioo.bsky.social!
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Marcel E. Visser @mevisser.bsky.social · 22/10/2025
Well done Cherine, Youri, Maartje and all the way from Lyon: Marlene!
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Dr Danni Hinchcliffe @dannihinchy.bsky.social · 22/09/2025
Should I stay or should I go?🐦 Fancy a #PhD studying Pied flycatchers in the Peak District to help better understand what drives individual & population performance? Think #habitat #movement #ecology #genetics 🌍 Make use of this nestbox PIT tag study system and join us! Email me #LJMU #NationalTrust
Male pied flycatcher
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Migration Ecology Group @migecol.bsky.social · 20/10/2025
We’re hiring a doctoral researcher in the area of migration ecology. The work will focus on the question of how and when migratory songbirds learn where their home is using #Motus. Part of the Cluster of Excellence NaviSense and linked with @sfb1372.bsky.social uol.de/job788en #ornithology
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Ben Sheldon @sheldonbirds.bsky.social · 20/10/2025
Interested in a PhD in ornithology? Funding available for projects at the interface of ecology, behaviour & evolution from Oct '26 working on long-term population studies of tits at Wytham, based in @biology.ox.ac.uk in the new Life & Mind Building in Oxford www.findaphd.com/phds/project...
Examples of some recent papers from graduate students in my group - a full list of recent papers and preprints can be found here (https://scholar.google.co.uk/citations?hl=en&user=pTdxVdIAAAAJ) and profile of the group here: https://egioxford.web.ox.ac.uk/membersThe annual Wytham Field Team Photo!Celebrating a successful field season with great food & good company - May 2025Front view of the Life & Mind Building, which opened in Oct 2025: The new home of Biology at Oxford
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NL Institute of Ecology NIOO-KNAW @niooknaw.bsky.social · 26/09/2025
New publication: Scope for #waterfowl to speed up migration to a warming Arctic. #climatechange #avianmigration doi.org/10.1038/s415...
Figure 1 in Linssen et al. (2025): "Spring migrations and tracking data of five Arctic-breeding waterfowl species."
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Stu Bearhop @stubearhop.bsky.social · 18/09/2025
Fully funded PhD working on insectivorous bird declines with a broad range of stakeholders. Starting ASAP #ornithology #zoology #biodiversity #science #ecology www.exeter.ac.uk/study/fundin...
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Marcel E. Visser @mevisser.bsky.social · 18/09/2025
Thanks Milos & Peter for organising this wonderful meeting!
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Marcel E. Visser @mevisser.bsky.social · 18/09/2025
Thanks Milos & Peter for organising this wonderful meeting!
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Ryan Norris @ryannorrissci.bsky.social · 17/09/2025
PhD position available to study the migration ecology and year-round demography of blackpoll warblers.
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Diego Gil @diegogil.bsky.social · 04/09/2025
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Marcel E. Visser @mevisser.bsky.social · 27/08/2025
Come and join the LTER-LIFE infrastructure
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