Tessera

Marcel E. Visser

@mevisser.bsky.social

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.

13 Posts534 Follower 76 Folgt

eLTER @elter-ri.eu · 3w ago

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...

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...

elter-ri.eu

Marcel E. Visser @mevisser.bsky.social · 2mo ago

Thanks to Cherine Jantzen for leading this!

NL Institute of Ecology NIOO-KNAW@niooknaw.bsky.social · 2mo ago

New publication: #Masting Breakdown in European #Beech Reduces Fitness Benefits of Masting, Partly Explained by #ClimateChange, by @mevisser.bsky.social and others. #mastseeding #pollen doi.org/10.1002/ece3...

NL Institute of Ecology NIOO-KNAW @niooknaw.bsky.social · 2mo ago

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...

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...

nioo.knaw.nl

Melissah Rowe @melissahrowe.bsky.social · 2mo ago

🐦 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

NL Institute of Ecology NIOO-KNAW @niooknaw.bsky.social · 2mo ago

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...

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...

nioo.knaw.nl

NL Institute of Ecology NIOO-KNAW @niooknaw.bsky.social · 2mo ago

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...

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 ...

nioo.knaw.nl

Barbara Tschirren @btschirren.bsky.social · 3mo ago

We are recruiting 🌟2 postdoctoral researchers🌟 for a NERC Large Grant project on the eco-evolutionary dynamics of badger - bovine tuberculosis (bTB) interactions.

NL Institute of Ecology NIOO-KNAW @niooknaw.bsky.social · 4mo ago

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.

Marcel E. Visser @mevisser.bsky.social · 4mo ago

The breeding season 2026 has started, our 72nd breeding season!

@animalecol-nioo.bsky.social · 4mo ago

We have a new record 🚨 the warm month of march in the Netherlands had its effect on the first laying date of the Great tits! Breaking the record by two days the first egg date this year is 21st March. One blue tit went even beyond that and noted a first egg date on 19th of march! #breedingseason2026

Groningen Institute for Evolutionary Life Sciences @gelifes.bsky.social · 5mo ago

📢 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

Tenure Track Assistant/Associate/Full Professor Flyway Ecology, Scientific Director of BirdEyes, Centre for Global Ecological Change - Rijksuniversiteit Groningen

werkenbij.rug.nl

Melissah Rowe @melissahrowe.bsky.social · 5mo ago

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.

NL Institute of Ecology NIOO-KNAW @niooknaw.bsky.social · 5mo ago

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.

Beatriz Taboada @bibi-tabs.bsky.social · 6mo ago

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...

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...

nioo.knaw.nl

NL Institute of Ecology NIOO-KNAW @niooknaw.bsky.social · 6mo ago

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/).

NL Institute of Ecology NIOO-KNAW @niooknaw.bsky.social · 6mo ago

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...

Tommaso Jucker @tommaso-jucker.bsky.social · 6mo ago

🚨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...

Marcel E. Visser @mevisser.bsky.social · 6mo ago

Well done @aureliastrauss.bsky.social Glad this is out now.

Dr. Aurelia Strauß@aureliastrauss.bsky.social · 6mo ago

🪺A nostalgic moment — another PhD chapter finally published earlier this month🐦 3 years of field work and 2 years of revisions 😅 Read more about fitness and life-history of female chronotype in great tits here: 🔗 rdcu.be/eYoJv 👥@babimt.bsky.social @barbarahelm.bsky.social @mevisser.bsky.social

A nest cup out of moss, in which six great tit eggs are arranged in a little circle. In the middle of the eggs there is an iButton - a small thermometer device.

Marcel E. Visser @mevisser.bsky.social · 7mo ago

Thanks Viktoriia for leading this excellent project.

Ecological Dynamics Dept. | IZW Berlin@ecodynizw.bsky.social · 7mo ago

Led by Viktoriia Radchuk, an international collaboration shows phenological shifts in response to changing temperatures allow populations to remain stable or even increase in numbers. Support from #sDiv @idiv-research.bsky.social

Edward Grey Institute @egioxford.bsky.social · 7mo ago

🚨🚨🚨 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 ⬇️

Keith McMahon@mcmahok.bsky.social · 7mo ago

We are hiring at the Wytham Woods for the upcoming field season. 4 roles available. Please share with anyone who might be interested. #UKbirds #birdringing

We are seeking to appoint four full-time field assistants to work on the Wytham Tit Project for 4-8 weeks in spring 2026.
Two 8-week field assistants will join the nest monitoring team; duties for these posts will include (i) collecting standardised data from nest-box breeding populations of blue and great tits, (ii) catching and ringing parent birds, (iii) ringing nestlings, and (iv) inputting data collected in the field. These positions with run from approximately Tuesday 7th April to Monday 1st June. Successful candidates for these positions must have (or be qualified to obtain) a BTO permit to ring adult great tits and blue tits.
A further two field assistants will be hired to support a project collecting behavioural (foraging) data for great tits breeding in the Wytham population. These roles will involve a significant amount of nightwork. Duties will include (i) setting up and calibrating electronic tracking equipment and nest box cameras in the field, (ii) mapping tracking equipment locations using GPS, (iii) helping with catching and ringing parent birds and fitting tracking devices, (iv) assisting with mistnetting to re-trap tagged parents, and (v) inputting data collected in the field. These positions with be approximately 7 and 4 weeks in duration, starting from 13th April and 4th May, respectively. Possession of a BTO ringing permit with misnet endorsement and driving license are highly desirable for these roles.
All fieldwork will take place in Wytham Woods, near Oxford. All Successful candidates must be able to demonstrate skill and enthusiasm for biological research as well as experience of fieldwork under arduous conditions, and both lone work and working as part of a team. Due to the short-term nature of these posts, successsful applicants must already have the right to work in the UK. Salary & Accommodation: Field assistants will be paid at grade 5.2 (£17.37/hour). Contact eleanor.cole@Biology.ox.ac.uk

Infect-Net @infect-net.bsky.social · 7mo ago

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.

Michael Wagner@michiwagner4.bsky.social · 8mo ago

🚨 Postdoctoral Opportunity for Female Scientists🚨 The University of Vienna is awarding at least 20 fully funded 4 year postdoctoral positions to outstanding female scientists Interested? Get in touch via direct message careers.univie.ac.at/en/postdoc/e... #MicroSky 🧪 #PostDoc @univie.ac.at

Patrick Jansen 🐾@patrickjansen.bsky.social · 7mo ago

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.

Erik Svensson @evolodonata.ecoevo.social.ap.brid.gy · 8mo ago

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: https://lu.varbi.com/en/what:job/jobID:848749/type:job/where:4/apply:1

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

lu.varbi.com

Steffen Oppel @steffopp.bsky.social · 8mo ago

NEW JOB in #ornithology with @vogelwarte.bsky.social to unravel the demographic drivers of population change in Alpine #swifts in #Switzerland: buff.ly/crV1rT8

Hanna Kokko @kokkonut.bsky.social · 8mo ago

Empseb is simply the best. If you're a PhD student of evolutionary biology, do go there!

EMPSEB 31@empseb.bsky.social · 8mo ago

📢 The Call for Abstracts for #EMPSEB31 is now open! 🔗 Full details & submission info on our website. ✈️ Applying for an ESEB Travel Grant? ⏰ Abstract deadline for travel-grant applicants: January 15, 2026 ⏳ General abstract deadline: February 1, 2026 #EvoBio #PhD #EMPSEB31

NL Institute of Ecology NIOO-KNAW @niooknaw.bsky.social · 8mo ago

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."

EOU Fledglings @eoufledglings.bsky.social · 9mo ago

The date is set for the next EOU Fledglings Meeting 🐥 in Gdansk, Poland! Share the news with your peers! 🦆

NL Institute of Ecology NIOO-KNAW @niooknaw.bsky.social · 9mo ago

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."

Dr. Emily G Simmonds @emilygsimmonds.bsky.social · 9mo ago

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

Barbara Tschirren @btschirren.bsky.social · 9mo ago

*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!

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 · 9mo ago

There are two LTER platforms in the Netherlands: Veluwe and Wadden Sea. See www.lter-nl.nl and www.lter-life.nl

eLTER@elter-ri.eu · 9mo ago

🌿 Looking for long-term ecosystem data? The eLTER Market Place links researchers with coordinators of 100+ Sites & Platforms across Europe. Request specific data, explore collaborations & join EU research efforts 👉 elter-ri.eu/elter-market...