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Jonas Trepel

@jonastrepel.bsky.social

Postdoctoral researcher at Aarhus University. Broadly interested in conservation biology, rewilding, megafauna ecology, global change & biodiversity.

38 Posts2013 Follower 505 Folgt

Jonas Trepel @jonastrepel.bsky.social · 3d ago

Our new paper is out in @ecography.bsky.social! We show that atmospheric nitrogen deposition is strongly associated with global vegetation greening, and may be an important - but often underestimated - driver of global vegetation change nsojournals.onlinelibrary.wiley.com/doi/10.1002/... (1/5)

Fig. 1 of the manuscript: Global increases in green plant biomass are strongly linked to atmospheric N deposition. (A) Spatial distribution of trends calculated with an autoregressive model that accounts for temporal autocorrelation; EVI was scaled by 10 000. (B) Model estimates from a generalized linear mixed effects model which accounts for spatial autocorrelation using spatial random fields. The x-axis is restricted to the 2.5–97.5th percentile of the respective variable; see the Supporting information for the full range and raw data points. A solid line indicates a statistically significant relationship, a dashed line a non-significant relationship. The units for the predictors are as follows: fire frequency is given in number of fires between 2001 and 2024; human modification index (HMI) change is the difference in percent of land modified between 2020 and 2000; mean annual temperature (MAT) is in °C and mean annual precipitation in mm, MAT trend and max. annual temperature trend is °C year−1 (from 1951 to 2024), N deposition is in kg km−2 year−1 and precipitation trend is mm year−1 (from 1951 to 2024). All variables have been scaled and centered for modeling but are plotted on their original scale to ease interpretation.

Jens-Christian Svenning @jcsvenning.bsky.social · 2w ago

New @econovoau.bsky.social study led by @jonastrepel.bsky.social: Global analysis shows that #vegetation in semi-natural areas greened (densified) faster w/ higher #Ndeposition - #nitrogen pollution may be an underestimated driver of global vegetation change🌿 doi.org/10.1002/ecog... #globalgreening

Global analysis suggests nitrogen deposition as an underestimated driver of vegetation greening

The local effects of atmospheric nitrogen deposition on plants are well established, yet a global empirical analysis of nitrogen deposition effects on vegetation dynamics is missing. Here, we assess ...

doi.org

Emma-Liina Marjakangas @emmamarjakangas.bsky.social · last wk.

📢 PhD opportunity at the University of Helsinki! Join the ANEW project to study ecological networks, seed dispersal and biodiversity conservation under global change. Apply by 31 Aug 2026. 🔗 jobs.helsinki.fi/job/31_8_202... #PhD #Ecology #Conservation #AcademicJobs

Doctoral Researcher (PhD student) in Ecological Networks and Biodiversity Conservation

jobs.helsinki.fi

Functional Ecology @funecology.bsky.social · 4w ago

👀Behind the Paper!👀 Author Jonas Trepel shares the role of large herbivores as key ecological players, the thorny side of fieldwork, and the importance of doing work that truly interests you🦏 Read it here👇️ buff.ly/pN9WIUX 🧪🌍️ @jonastrepel.bsky.social

Jonas Trepel | Keeping the grasses in check: Wild large herbivores promote plant diversity by reducing dominance

In this behind the Paper blog post, author Jonas Trepel – a postdoctoral researcher at Aarhus University – delves into the world of ecosystems engineers and discusses his paper “W…

buff.ly

Jonas Trepel @jonastrepel.bsky.social · 3mo ago

Hurray - new paper out in Functional Ecology! @funecology.bsky.social @econovoau.bsky.social  Wild large herbivores promote plant diversity and functional redundancy by reducing dominance: besjournals.onlinelibrary.wiley.com/doi/10.1111/... 1/5

Wild large herbivores promote plant diversity and functional redundancy by reducing dominance

Read the free Plain Language Summary for this article on the Journal blog.

besjournals.onlinelibrary.wiley.com

Matt Kerr @mattkerr.bsky.social · 3mo ago

In our new Letter in @society4conbio.bsky.social, we argue that restoration efforts should be guided by ecological impact and not species’ origin. Existing frameworks assess non-native species by their impact on native species. Applied universally, they would indicate all herbivores are harmful.

Jonas Trepel @jonastrepel.bsky.social · 3mo ago

Check out our new letter in Conservation Biology where we argue that (re-)introduced large herbivores are often wrongly framed as harmful because herbivory is automatically equated with ecological damage - overlooking their potential to restore biodiversity and ecosystem functioning.

Matt Kerr@mattkerr.bsky.social · 3mo ago

Herbivory is a fundamental ecological process; treating it as harm (like recent work has suggested) misinforms conservation decisions about introduced herbivores. conbio.onlinelibrary.wiley.com/doi/10.1111/...

ECONOVO - DNRF Center of Excellence @econovoau.bsky.social · 5mo ago

On World Rewilding Day, we are celebrating the first ECONOVO @dg.dk-funded PhD 🎉. Today @jonastrepel.bsky.social passed his thesis on Ecological Dynamics in a Novel Biosphere: Large Herbivores as Drivers of Vegetation Structure and Plant Diversity with flying colors and 6 months ahead of time 👏!

Jens-Christian Svenning @jcsvenning.bsky.social · 5mo ago

Dense, dark forests in Europe are a modern phenomenon - Europe’s landscapes for 23 Myr were mostly tree- & flower-rich mosaics shaped by large herbivores, not dense #forests, see our new synthesis www.eurekalert.org/news-release... #forests #woodlands #paleoecology #nature #trees #refiorestation

Dense, dark forests in Europe are a modern phenomenon

A new, comprehensive study shows that Europe’s landscapes over the past more than 20 million years have predominantly been a mosaic of grasslands, scrub and woodlands of varying density. A light...

eurekalert.org

Sean Michaletz @seanmichaletz.bsky.social · 7mo ago

🍁Funding for new PhD students ($40k/yr) & postdocs ($70k/yr) coming from outside Canada. Contact me if interested in #Ecophysiology at #UBC in #Vancouver! Possible topics: leaf physiology, thermal ecology, microclimate, scaling, tree physiology, forest ecology, more! michaletzlab.org Please share!

Jens-Christian Svenning @jcsvenning.bsky.social · 7mo ago

Happy to see this @econovoau.bsky.social paper out in the new issue of Journal of Animal Ecology - higher herbivore activity is linked to greater herb diversity & plant functional redundancy besjournals.onlinelibrary.wiley.com/doi/epdf/10.... #ECONOVO #Biodiversity #savanna #SouthAfrica #Rewilding

Joe Atkinson @joe-atkinson.bsky.social · 7mo ago

✨ PhD opportunity studying drought and heatwave effects on threatened plants ✨🔥 Funded by an ARC DECRA awarded to the amazing Dr Ilaíne Matos and co-supervised by Dr Sami Rifai and me! Limited by the character limit here, so please see the attached flyer for all the details - please share widely!

PhD Opportunity in Plant Ecophysiology – Adelaide University
We are looking for an PhD candidate to join an exciting research project focused on understanding heat and drought combined impacts on threatened plants’ mortality.
Key Objectives:
Describe drought sensitivity in juvenile and mature individuals of threatened plant species.
Disentangle the effects of elevated temperature, soil dryness, and atmospheric water demand on the sensitivity of threatened species to hotter droughts.
Model threatened species’ risk of mortality under current and future hotter droughts.
Eligibility:
Australians and international applicants with a completed Master's degree (GPA > 5.0) and/or a completed 4-year Bachelor with Honours (GPA > 5.0) in Plant Biology or related areas;
Proof of English proficiency (e.g. IELTS score > 6.5 or equivalent qualification), only for applicants who speak English as a second language.
Strong analytical and programming skills in R or Python.
Genuine interest in studying plants with previous experience in plant ecology and/or physiology.
Effective writing skills; a passion for reading, writing, and continually improving as a communicator.
Ability to drive in Australia is desirable but not essential.
Start Date: April 2026 (negotiable)
Duration: 3.5 years
Benefits: PhD scholarship (tax-exempt stipend of $36,500 AUD p.a. + $3,000 AUD p.a. top up);
Higher stipend rate for Aboriginal and Torres Strait Islander candidates ($ 53,608 p.a.);
Relocation allowances for both domestic and international candidates;
Single Overseas Student Health cover for international applicants.
100% tuition fee waiver.
How to Apply:
Email the following documents to ilaine.matos@adelaide.edu.au before the 15th of February 2026. Women and people underrepresented in research are encouraged to apply.
1-page cover letter explaining why you are interested in this position and your previous experiences relevant for this opportunity.
Curriculum Vitae in the Adelaide University format.

Caroline Lehmann @caroaceae.bsky.social · 8mo ago

"Bond’s work leaves behind an inconvenient lesson for an era of climate urgency: that speed is not a substitute for understanding, and that good intentions, applied without care, can erase ancient worlds as efficiently as neglect." A beautiful tribute to William Bond. Forever missed by many.

William Bond, defender of grasslands

In recent years, one of the loudest ideas in environmental policy has been that trees are the planet’s universal remedy. Plant enough of them, in enough places, and carbon will be soaked up, water wil...

butlernature.com

Jonas Trepel @jonastrepel.bsky.social · 8mo ago

Super exciting PhD position on large herbivores, ecosystem functioning and biodiversity conservation in @kampjohannes.bsky.social's fantastic lab in Göttingen @consbiogoe.bsky.social. Please share widely!

Conservation Biology Göttingen@consbiogoe.bsky.social · 8mo ago

Come work with us! #PhD position on #ecosystem and #biodiversity effects of large #herbivores on the Eurasian steppes now announced: www.euraxess.de/jobs/395512 Nice combination of fieldwork and meta-analysis, co-supervised by @jonastrepel.bsky.social and ejlundgren.github.io

Bjerknes Center for Climate Research (BCCR)@bjerknes.uib.no · 9mo ago

Ecosystem gas fluxes are crucial to water and energy cycling. Fluxes are measured in closed-loop chambers. But how do you deal with the data? An R package by @jogaudard.bsky.social from @unibergen.bsky.social and Bjerknes simplifies processing and comparison. Check it out! 🧪 doi.org/10.1111/2041...

Journal of Animal Ecology @animalecology.bsky.social · 9mo ago

🐘 New research - Large herbivores are linked to higher herbaceous plant diversity and functional redundancy across spatial scales ➡️ buff.ly/zqRgqqo @jonastrepel.bsky.social @joe-atkinson.bsky.social @andrewabraham.bsky.social @jessekalwij.bsky.social @jcsvenning.bsky.social @econovoau.bsky.social

Jonas Trepel @jonastrepel.bsky.social · 9mo ago

Excited to share that my first PhD chapter just got published in @animalecology.bsky.social! You can check it out here: doi.org/10.1111/1365.... Based on fieldwork in the beautiful Waterberg Biosphere Reserve in South Africa, we show that.. (1/3)

Beautiful Sunset in Kaingo Private Game Reserve, one of our fieldsites

A white rhino in Dabchick Wildlife Reserve, one of our fieldsites

Woody savanna landscape in Swebeswebe Nature Reserve, on of our fieldsites

Overview of the reserves in our study sites. Shows the location of 10 included reserves with pictograms indicating the largest herbivore in each.

Our World in Data @ourworldindata.org · 9mo ago

The largest mammals have always been at the greatest risk of extinction – this is still the case today. 🧵 The wipeout of the largest mammals is a global phenomenon that we see across many regions.

Eight small histograms in two columns compare mammal body mass with extinction outcomes. Left column: “Extinctions in the Pleistocene”; right: “Risk of extinction today”. Rows show North America, Australia, Africa, and South America. X-axes are log body mass from tiny to very large.

In the past, most extinctions were among the largest mammals, while small species largely survived.

Today, threat levels still rise with body size: many large mammals are threatened—especially by hunting—while habitat loss and other pressures increasingly affect small and mid-sized species.

Australia and the Americas already lost many big mammals; Africa retains more but many are threatened.

Takeaway: big mammals went first and remain at greatest risk.

Source: Lyons et al. 2004; compiled by Our World in Data. Licensed CC BY (Our World in Data / Hannah Ritchie).

Brian J. Enquist @bjenquist.bsky.social · 10mo ago

Please pass along, I’m recruiting PhD students to join our Macroecology Lab @uofa-eeb.bsky.social We study phys ecology, macroecology, biodiversity - spanning scaling, trait-based ecology, theory, comparative biology & ecoinformatics. Several avenues for funding. Please reach out if interested🧪🌐🌾

Joseph Gaudard @jogaudard.bsky.social · 10mo ago

My first PhD paper is out! It describes the fluxible #rstats package, a toolbox to process and quality check #ecosystem #gasfluxes in a reproducible and automated way. @unibergen.bsky.social @btwnthefjords-uib.bsky.social @bjerknes.uib.no @li-corenv.bsky.social @methodsinecoevol.bsky.social

fluxible: An R package to process ecosystem gas fluxes from closed‐loop chambers in an automated and reproducible way

Measuring ecosystem gas fluxes is crucial to understanding the dynamics of ecosystem water and energy cycling. A common method to measure ecosystem gas fluxes (CO2, CH4, N2O) and to compare experi...

doi.org

Jens-Christian Svenning @jcsvenning.bsky.social · 11mo ago

Debating the aesthetics of #wind & #solar is a luxury. The real crisis is climate change—threatening billions with deadly heat & catastrophic ecosystem breakdowns ♨️🥵🔥 Green #energy is a necessity🍃 Challenges exist (noise, land use) but are manageable - biggest risk is inaction #dkpol #climatechange

Prof. Vigdis Vandvik @vvandvik.bsky.social · 11mo ago

Come work with us! Fully funded #PhD position in global change ecology - working in a cross-disciplinary cohort of 8 PhD students studying mountains in transition. 🧪🌐🏔️ @btwnthefjords-uib.bsky.social @cesam-uib.bsky.social www.jobbnorge.no/en/available...

PhD Research Fellow in global change ecology (285493) | University of Bergen

Job title: PhD Research Fellow in global change ecology (285493), Employer: University of Bergen, Deadline: Wednesday, October 1, 2025

jobbnorge.no

Conservation Biology Göttingen @consbiogoe.bsky.social · 11mo ago

New paper: 3rd chapter of Anne Graser's PhD thesis now published: How #forest disturbance, post-disturbance management and wild #ungulates affect #moth communities: besjournals.onlinelibrary.wiley.com/doi/10.1111/... @jappliedecology.bsky.social

Jonas Trepel @jonastrepel.bsky.social · 12mo ago

I’m very happy to share our new paper “Intensive feeding modifies nutrient patterns in a strictly protected area” (doi.org/10.1016/j.je...), just out in Journal of Environmental Management. We explore underestimated consequences of a common management practice: supplementary feeding of deer. (1/5)

Redirecting

doi.org

Meade Krosby @meadekrosby.bsky.social · last yr.

This paper is getting attention for suggesting ecosystem restoration won't help with mitigation, but restoration is still *critical* for adaptation. Restoring coastal wetlands helps reduce risks from sea level rise and hurricanes, restoring urban forests helps reduce risks from extreme heat, etc...

Limited carbon sequestration potential from global ecosystem restoration - Nature Geoscience

The maximum carbon sequestration potential from global terrestrial ecosystem restoration efforts until 2100 is 96.9 Gt, which is equivalent to 3.7–12.0% of anthropogenic emissions until then, accordin...

nature.com

Dr Charlie Gardner @charliejgardner.bsky.social · last yr.

We can't rely on nature to fix climate change because ecosystems will collapse as heating worsens The only way out is to eliminate fossil fuels at double speed ... and protect and restore nature for a gazillion other reasons

Limited carbon sequestration potential from global ecosystem restoration - Nature Geoscience

nature.com

Our World in Data @ourworldindata.org · last yr.

Half of the world’s habitable land is used for agriculture, with most of this used to raise livestock for dairy and meat. How much would our agricultural land use decline if the world adopted a plant-based diet?

Joseph Gaudard @jogaudard.bsky.social · last yr.

fluxible v1.2.3 (dev) flux_lrc: standardizes CO2 fluxes at fixed PAR values with light response curves Experimental, feedback more than welcome! @btwnthefjords-uib.bsky.social @hilaryrosed.bsky.social @jonastrepel.bsky.social @martabaumane.bsky.social #rstats #ecosystemgasfluxes #carbonfluxes

Standardizes CO2 fluxes at fixed PAR values — flux_lrc

Calculates light response curves for CO2 fluxes and standardizes CO2 fluxes according to the LRC

plant-functional-trait-course.github.io

Science Magazine @science.org · last yr.

A 2021 #ScienceReview showed how the rapidly changing soundscape of modern oceans impacts marine life globally—and how mitigating these impacts is key to achieving a healthier ocean. Learn more on #WorldOceansDay: scim.ag/4jFFb8V

The illustrations from top to bottom show ocean soundscapes from before the industrial revolution that were largely composed of sounds from geological (geophony) and biological sources (biophony), with minor contributions from human sources (anthrophony), to the present Anthropocene oceans, where anthropogenic noise and reduced biophony owing to the depleted abundance of marine animals and healthy habitats have led to impacts on marine animals. These impacts range from behavioral and physiological to, in extreme cases, death. As human activities in the ocean continue to increase, management options need be deployed to prevent these impacts from growing under a “business-as-usual” scenario and instead lead to well-managed soundscapes in a future, healthy ocean. AUV, autonomous underwater vehicle.

Tobias Kuemmerle @tkuemmerle.bsky.social · last yr.

Come join us at the Conservation Biogeography Lab @biogeoberlin.bsky.social @humboldtuni.bsky.social and carry out work on megafauna in Europe pages.cms.hu-berlin.de/biogeo/websi...

New PhD position on large mammals and land-use change in Europe | Conservation Biogeography Lab

We are excited to invite applications for a new PhD position on large mammals and land-use change in Europe. Join us at the Conservation and Biogeography Lab at Humboldt University Berlin!

pages.cms.hu-berlin.de