Jonas Trepel

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🧪🌐🌾

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...

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

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

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

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...

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

Team: It was a pleasure working with a great team from @econovoau.bsky.social, the Bavarian Forest NP and @wild-ecol-cons.bsky.social, including @andrewabraham.bsky.social, Walter Di Nicola, Uriel Gélin, Martin Gahbauer, Marco Heurich and Elizabeth le Roux. (5/5)

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)

Why it matters: These elevated nutrients could cascade through the ecosystem and for example affect soil microbial activity, alter plant communities, and even affect other herbivores. (3/5)

The figure shows the predicted plant nitrogen concentration in a radius of 2500m around the enclosures/feeding sites, clearly highlighting higher plant nutrient concentrations closer to the enclosures.

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)

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)

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...

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...

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

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?

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

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.

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

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!

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...

A graph comparing the greenhouse gas emissions of various protein-rich foods, measured in kilograms of carbon dioxide equivalents (kgCO2 eq) per 100 grams of protein. The chart features colorful curves representing different food items, with the height of each curve indicating the level of emissions associated with its production. The bottom line is that plant-based protein sources still have a lower footprint than the lowest-impact meat products. Sources are credited to Joseph Poore and Thomas Nemecek (2018) for the data and Our World in Data for the visualization

If you want to reduce the carbon footprint of your diet, less meat is nearly always better than sustainable meat.

Just got the licoread R package on CRAN!
It imports raw files from LI-COR gas analyzers and turns them into a #fluxible friendly dataframe
#rstats @li-corenv.bsky.social
jogaudard.github.io/licoread/

With Bent Rech, @jcsvenning.bsky.social , @matthiaswaltert.bsky.social,
@robertoruggiero.bsky.social, Robert Buitenwerf, @econovoau.bsky.social @consbiogoe.bsky.social

From Grasslands to Forblands: Year‐round grazing as a driver of plant diversity Our results indicate that typical, seasonal grazing may be counterproductive in terms of promoting plant diversity. We found the most effective management strategy for conserving species-rich forb co...

We also find that herbivores use more of the area in winter, highlighting the importance of year-round compared to summer grazing. This aligns nicely with a recent paper by @skjoldsoendergaard.bsky.social, finding higher plant richness under year-round but not summer grazing.
doi.org/10.1111/1365...

Our findings show that large herbivores complement each other in their habitat use, therefore reintroducing more diverse herbivore assemblages likely maximizes desired ecological impacts such as increased habitat heterogeneity and biodiversity.

Figure 2 from Rech et al. (2025) shows habitat selection estimates for cattle, horses, and buffalo, separated by feeding status and season.

Check out our new paper, led by Bent Rech: we investigate space use of semi-feral water buffalo, cattle, and horses in a Danish rewilding area. We found that the three species differ markedly in their seasonal habitat selection and responses to resources and infrastructure.
doi.org/10.1007/s002...

Looking for an R based solution to process ecosystem gas fluxes data from closed loop chamber systems?

Come to my #EGU25 talk!
🗓️2025-04-30
⌚11:50
📍2.95

meetingorganizer.copernicus.org/EGU25/EGU25-...

#rstats #OpenScience

Postdoc alert! Looking for someone to join our new savanna zoogeochemistry project with @ymalhi.bsky.social and Mark Robertson. Please circulate widely! Contact me if interested. #ecosystemecology #largemammalherbivores #termites

my.corehr.com/pls/ulivrecr...

Eugenics is on the rise again: human geneticists must take a stand Scientists must push back against the threat of rising white nationalism and the dangerous and pseudoscientific ideas of eugenics.

Scientists must push back against the threat of rising white nationalism and the dangerous and pseudoscientific ideas of eugenics

https://go.nature.com/4jGqiUc

Temperate forest plants are associated with heterogeneous semi-open canopy conditions shaped by large herbivores - Nature Plants Temperate forest plants favour heterogeneous semi-open woodlands associated with high herbivore densities, rather than uniform closed-canopy forests. Herbivore loss is therefore a probable driver of e...

🌿 Our new study in @natplants.nature.com: Most European temperate forest plants are associated with semi-open, herbivore-shaped habitats—not closed-canopy #forests 🐎🌳🔆🌸 Highlights the need for trophic #rewilding in #conservation & need to avoid uniform dense #reforestation🌿
📄 doi.org/10.1038/s414...

Doctoral Researcher, Biodiversity Change Doctoral Researcher, Biodiversity Change

I am recruiting a doctoral researcher to conduct research on tundra plants and microclimates 🌱🌡️💧❄️ Call ends April 25! jobs.helsinki.fi/job/Helsinki...

Revisiting the case for assisted colonisation under rapid climate change Maintaining functioning ecosystems in a hotter world will require mass-scale assisted colonisation, so appropriate conservation policy, legislative frameworks and regulating bodies must be urgently d....

As climate change will fundamentally change the environment

we cannot carry on with traditional conservation & hope that will be enough

We need to start investigating new approaches to maintain functioning ecosystems

Our new paper
besjournals.onlinelibrary.wiley.com/doi/10.1111/...

Biodiversity loss in all species and every ecosystem linked to humans – report Sweeping synthesis of 2,000 global studies leaves no doubt about scale of problem and role of humans, say experts Humans are driving biodiversity loss among all species across the planet, according to a synthesis of more than 2,000 studies. The exhaustive global analysis leaves no doubt about the devastating impact humans are having on Earth, according to researchers from the Swiss Federal Institute of Aquatic Science and Technology (Eawag) and the University of Zurich. The study – which accounted for nearly 100,000 sites across all continents – found that human activities had resulted in “unprecedented effects on biodiversity”, according to the paper, published in Nature. Continue reading...

Biodiversity loss in all species and every ecosystem linked to humans – report

Regional databases demonstrate macroecological patterns less clearly than systematically collected field data The analysis of macroecological patterns has necessitated the use of large, composite datasets recording local-scale species occurrences distributed across the globe. These datasets, however, have va....

The third part of my PhD work is now out on Early View in @ecography.bsky.social, available #OpenAccess. 🌐🐚

We were interested in how macroecological patterns recreated from OBIS data might differ from those seen in the field and across methods -

nsojournals.onlinelibrary.wiley.com/doi/10.1111/...