Jonas Trepel

Jonas Trepel

@jonastrepel.bsky.social

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

2K followers521 following37 posts

Jonas Trepel reposted

Julia Kemppinen
@juliakemppinen.bsky.social

Open position! Postdoc project on snow modelling and Arctic ecosystems ❄️🌿🌡️💧 3-yr position with assistant prof @niittynen.bsky.social at @oulu.fi ! See the link and apply by 15.10.2026 oulunyliopisto.varbi.com/fi/what:job/...

oulunyliopisto.varbi.comPostdoctoral Researcher in snow and microclimate processes of cold-climate ecosystemsWe are now looking for a Postdoctoral Researcher in snow and microclimate processes of cold-climate ecosystems for a 3-year fixed-term position to join us in the Faculty of Technology, Water, Energy a
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Jonas Trepel
@jonastrepel.bsky.social

Our study is correlational rather than causal, but the consistency of the pattern across biomes and multiple sensitivity analyses suggests atmospheric nitrogen deposition deserves much greater attention in discussions of global vegetation change, biodiversity and Earth system dynamics. (4/5)

Jonas Trepel
@jonastrepel.bsky.social

Using satellite observations from 2001–2024, we assessed how vegetation greening relates to N deposition alongside climate change, fire and human land-use change. Across most major climate zones and ecosystem types, nitrogen deposition showed the strongest association with greening. (2/5)

Jonas Trepel
@jonastrepel.bsky.social

We also compared strictly protected areas with matched unprotected sites. Greening was slightly slower inside PAs, but protection did not alter the relationship between nitrogen deposition and vegetation greening, suggesting these global pressures extend well beyond reserve boundaries. (3/5)

Jonas Trepel reposted

Jens-Christian Svenning
@jcsvenning.bsky.social

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

doi.orgGlobal analysis suggests nitrogen deposition as an underestimated driver of vegetation greeningThe 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 ...

Jonas Trepel reposted

Emma-Liina Marjakangas
@emmamarjakangas.bsky.social

📢 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

jobs.helsinki.fiDoctoral Researcher (PhD student) in Ecological Networks and Biodiversity ConservationDoctoral Researcher (PhD student) in Ecological Networks and Biodiversity Conservation

Jonas Trepel reposted

Functional Ecology
@funecology.bsky.social

👀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

buff.lyJonas Trepel | Keeping the grasses in check: Wild large herbivores promote plant diversity by reducing dominanceIn 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…
Jonas Trepel
@jonastrepel.bsky.social

Herbivores also made vegetation more open by reducing vegetation height and density - but these structural changes did not explain impacts on diversity. Instead, reducing dominance seems to be the key mechanism linking herbivores to more diverse and potentially more resilient plant communities. 4/5

Jonas Trepel
@jonastrepel.bsky.social

We used six long-term (21-71 years!) exclosure experiments across South African savannas and thicket ecosystems to test how (nearly) intact herbivore communities affect plant communities. 2/5

Jonas Trepel
@jonastrepel.bsky.social

We found that large herbivores increased plant species richness and functional redundancy, mainly by reducing the dominance of a few plant species and allowing more herbaceous plants to coexist. Interestingly, these effects were strong in savannas but largely absent in the thicket. 3/5

Jonas Trepel reposted

Matt Kerr
@mattkerr.bsky.social

Replying to @mattkerr.bsky.social

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

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

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/...

conbio.onlinelibrary.wiley.comReevaluating introduced herbivores in conservationClick on the article title to read more.

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Jens-Christian Svenning
@jcsvenning.bsky.social

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

eurekalert.orgDense, dark forests in Europe are a modern phenomenonA 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...

Jonas Trepel reposted

Sean Michaletz
@seanmichaletz.bsky.social

🍁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!

Jonas Trepel reposted

Joe Atkinson
@joe-atkinson.bsky.social

✨ 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!

Jonas Trepel
@jonastrepel.bsky.social

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

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

Jonas Trepel
@jonastrepel.bsky.social

higher herbivory intensity in South African savannas increases herbaceous plant richness and functional redundancy. Effects were largely consistent across scales, but strongest at the landscape level, highlighting large herbivores’ role in promoting diversity and ecosystem resilience (2/3)

Jonas Trepel reposted

Our World in Data
@ourworldindata.org

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.

Jonas Trepel reposted

Joseph Gaudard
@jogaudard.bsky.social

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

doi.orgfluxible: An R package to process ecosystem gas fluxes from closed‐loop chambers in an automated and reproducible wayMeasuring 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...

Jonas Trepel reposted

Jens-Christian Svenning
@jcsvenning.bsky.social

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

Jonas Trepel reposted

Prof. Vigdis Vandvik
@vvandvik.bsky.social

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...

jobbnorge.noPhD Research Fellow in global change ecology (285493) | University of BergenJob title: PhD Research Fellow in global change ecology (285493), Employer: University of Bergen, Deadline: Wednesday, October 1, 2025
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Jonas Trepel
@jonastrepel.bsky.social

Takeaway: A solution to one problem (deer-human conflict) may inadvertently shift landscape chemistry and compromise conservation goals, highlighting the need to critically evaluate all potential consequences of common management approaches such as supplementary feeding. (4/5)

Jonas Trepel
@jonastrepel.bsky.social

Setup & findings: In the Bavarian Forest NP (and many other places), managers use winter feeding to manage deer populations. We found this raises plant nutrient levels not just at feeding sites, but hundreds of meters beyond. Read the full paper for more detail! (2/5)

Jonas Trepel reposted

Dr Charlie Gardner
@charliejgardner.bsky.social

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

nature.comLimited carbon sequestration potential from global ecosystem restoration - Nature GeoscienceThe 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...

Jonas Trepel reposted

Our World in Data
@ourworldindata.org

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?

Jonas Trepel reposted

Joseph Gaudard
@jogaudard.bsky.social

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

plant-functional-trait-course.github.ioStandardizes CO2 fluxes at fixed PAR values — flux_lrcCalculates light response curves for CO2 fluxes and standardizes CO2 fluxes according to the LRC

Jonas Trepel reposted

Science Magazine
@science.org

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

Jonas Trepel reposted

Tobias Kuemmerle
@tkuemmerle.bsky.social

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...

pages.cms.hu-berlin.deNew PhD position on large mammals and land-use change in Europe | Conservation Biogeography LabWe 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!