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Jonas Trepel

@jonastrepel.bsky.social

1.9K followers 450 following 17 posts

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

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Reposted by Jonas Trepel

Joseph Gaudard @jogaudard.bsky.social · 13d

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...

Reposted by Jonas Trepel

Jens-Christian Svenning @jcsvenning.bsky.social · 17d

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

Reposted by Jonas Trepel

Prof. Vigdis Vandvik @vvandvik.bsky.social · Aug 28

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

www.jobbnorge.no

Reposted by Jonas Trepel

Conservation Biology Göttingen @consbiogoe.bsky.social · Aug 28

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 · Aug 17

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)

Jonas Trepel @jonastrepel.bsky.social · Aug 17

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 · Aug 17

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)

Jonas Trepel @jonastrepel.bsky.social · Aug 17

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)

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.

Jonas Trepel @jonastrepel.bsky.social · Aug 17

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)

Reposted by Jonas Trepel

Meade Krosby @meadekrosby.bsky.social · Aug 1

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...

Reposted by Jonas Trepel

Dr Charlie Gardner @charliejgardner.bsky.social · Aug 1

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

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...

Reposted by Jonas Trepel

Our World in Data @ourworldindata.org · Jun 18

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?

Reposted by Jonas Trepel

Joseph Gaudard @jogaudard.bsky.social · Jun 13

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

Reposted by Jonas Trepel

Science Magazine @science.org · Jun 8

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.

Reposted by Jonas Trepel

Tobias Kuemmerle @tkuemmerle.bsky.social · Jun 7

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

Reposted by Jonas Trepel

Our World in Data @ourworldindata.org · May 13

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

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

Reposted by Jonas Trepel

Joseph Gaudard @jogaudard.bsky.social · May 9

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/

Reads Raw Files from Li-COR Gas Analyzers

Reads raw files from Li-COR gas analyzers and produces a dataframe that can directly be used with fluxible <https://cran.r-project.org/package=fluxible>.

jogaudard.github.io

Jonas Trepel @jonastrepel.bsky.social · Apr 29

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

Jonas Trepel @jonastrepel.bsky.social · Apr 29

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...

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...

Jonas Trepel @jonastrepel.bsky.social · Apr 29

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.

Jonas Trepel @jonastrepel.bsky.social · Apr 29

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...

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

Reposted by Jonas Trepel

Joseph Gaudard @jogaudard.bsky.social · Apr 29

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

Reposted by Jonas Trepel

Kate Parr @funkyant.bsky.social · Apr 28

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...

Reposted by Jonas Trepel

Nature @nature.com · Apr 24

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

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

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.

Reposted by Jonas Trepel

Jens-Christian Svenning @jcsvenning.bsky.social · Apr 14

🌿 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...

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...