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Jens-Christian Svenning

@jcsvenning.bsky.social
6.6K followers 642 following 442 posts

Scientist: #biodiversity, #macroecology, #climatechange, #restoration & #rewilding, #novelecosystems, #plants & #vegetation, #megafauna, #human-#nature relations & #remotesensing. Director, econovo.au.dk

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Jens-Christian Svenning @jcsvenning.bsky.social · 19/09/2026
The paper: Hazelnut shell isotope values indicate open and semi-open growing conditions in Early–Mid-Holocene southern Scandinavia www.sciencedirect.com/science/arti...
sciencedirect.com
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Jens-Christian Svenning @jcsvenning.bsky.social · 19/09/2026
Stable carbon isotopes from #Mesolithic hazelnuts from 6 Danish sites show that 83% of source hazels grew under open or semi-open conditions - in contrast to classic closed-forest expectations🔆🍃Thx to Laila Rehmeier & @felixthehauskat.bsky.social for leading!⬇️ #Palaeoecology #Archaeology #Forests
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Alejandro Ordonez @anordonez1.bsky.social · 16/09/2026
Exciting talk by @jcsvenning.bsky.social, director of @econovoau.bsky.social, showcasing the role of #rewilding as a key tool to redirect ecological changes under the ongoing #Ecological #Novelty.
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Jens-Christian Svenning @jcsvenning.bsky.social · 16/09/2026
Glad to give a session keynote today at the #NSO2026–#GfOe2026 conference: megafauna extinctions & trophic #rewilding in temperate/boreal Europe. How can restoring large herbivores revive mosaic biomes? Join us 14–16 in the plenary room. Thx to @skjoldsoendergaard.bsky.social & co-speakers🌿🦬
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Jens-Christian Svenning @jcsvenning.bsky.social · 09/09/2026
In @elife.bsky.social: Small mammalian herbivores at moderate densities facilitate livestock growth by improving vegetation composition in grasslands doi.org/10.7554/eLif... #pika #lagomorph #ochotona #interactions #herbivores
doi.org
Small mammalian herbivores at moderate densities facilitate livestock growth by improving vegetation composition in grasslands
At moderate densities, small mammalian herbivores can enhance livestock weight gains by suppressing toxic plants and improving both the abundance and nutritional quality of palatable forage in rangela...
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Markus Wagner @wagnermarkus.bsky.social · 27/08/2026
A nice study!
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Jens-Christian Svenning @jcsvenning.bsky.social · 27/08/2026
Why did the #neandertals go extinct? Our new analysis shows no climate-driven fragmentation of #neanderthal habitats prior to their #extinction, arguing against climate-driven habitat loss as the cause - and pointing to Homo sapiens👣 #archaeology #hominids ➡️https://doi.org/10.1038/s43247-026-03960-8
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Tom Kimmerer, PhD @tomkimmerer.bsky.social · 25/08/2026
At Our Trees, we are discussing pawpaw, which has become very popular in recent years. Are you a pawpaw fan? Read the story and take the quiz.
ourtrees.substack.com
The PawPaws Ripen
The rise of America’s largest native fruit
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juli g pausas @jgpausas.bsky.social · 23/08/2026
Some photos of the #Gironda fire (42 000 ha) in #Bordeaux I've just received from a friend. A large part of the area were homogeneous Pinus pinaster plantations. In the 21st-century climate, forest plantations need rethinking On the legacy of pine plantations doi.org/10.1111/1365... 🌍🔥🌳🔥🍁 wildfire
Burned pine plantation, with all pines aligned in rowsBurned pine plantation, with all pines aligned in rows
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Jonas Trepel @jonastrepel.bsky.social · 02/08/2026
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.
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Jens-Christian Svenning @jcsvenning.bsky.social · 24/07/2026
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.org
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 ...
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Sabhrina Aninta @sagitaninta.bsky.social · 01/08/2026
"Drawing on an analysis of over 100000 articles in ecology-related disciplines [...], we show that the shift to pay-to-publish OA has already reduced participation by researchers from many middle-income countries." nsojournals.onlinelibrary.wiley.com/doi/full/10....
nsojournals.onlinelibrary.wiley.com
Payment‐based open access is biasing scientific participation from the Global South in ecology
Opening access to the products of scientific research is widely considered a key step toward both fairness and better science worldwide. Since the 1990s, different forms of open access (OA) to journa...
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Rachel @slightlycaustic.bsky.social · 29/07/2026
www.cbc.ca/news/world/h...
cbc.ca
A human-made forest is at the centre of France's raging wildfires | CBC News
Scientists say climate change is driving the extraordinary fire conditions gripping western Europe, but that the scale of those fires cannot be understood without looking at how humans drastically cha...
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Jens-Christian Svenning @jcsvenning.bsky.social · 25/07/2026
Thanks so much!
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Jens-Christian Svenning @jcsvenning.bsky.social · 24/07/2026
Island #biodiversity in the #Anthropocene - see our new paper on how people have reshaped island biota & ecosystems, just out in Science Advances, led by Tom Matthews & nicely summarized by @ferransayol.bsky.social below 🏝🦤🦤🐒
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Jens-Christian Svenning @jcsvenning.bsky.social · 24/07/2026
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.org
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 ...
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Jens-Christian Svenning @jcsvenning.bsky.social · 22/07/2026
Congratulations!
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Jens-Christian Svenning @jcsvenning.bsky.social · 07/07/2026
📢 We’re hiring at Aarhus University! Tenure-track or permanent on vertebrate-driven #ecosystem processes, especially large #mammals w/in @econovoau.bsky.social's strong interdisciplinary environment spanning #ecology, paleoecology, biodiversity science & global change biology 🦬🌿🌍 ➡️More info below
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Jens-Christian Svenning @jcsvenning.bsky.social · 17/07/2026
Interview i @weekendavisen.dk om #egeprocessionsspinder 🌿🐛 #econovo
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Danmarks Grundforskningsfond @dg.dk · 17/07/2026
–Man kan fremme de naturlige forsvarsmekanismer mod, at der bliver virkelig mange af de her larver 👉Weekendavisen @jcsvenning.bsky.social, @econovoau.bsky.social Fx ved at danne gode rammer for mejser, der spiser larven, og snyltehvepse, der lægger æg i larven. www.weekendavisen.dk/ideer/at-lev...
weekendavisen.dk
At leve med larven
Toksisk. Egeprocessionsspinderens giftige hår stikker os som chili og brandmænd. Det er virkelig dårligt nyt, hvis man vil udvikle en modgift.
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Jens-Christian Svenning @jcsvenning.bsky.social · 10/07/2026
5/5: Også god info om her: Forvaltning af Egeprocessionsspinderen – med fokus på sameksistens og biodiversitet traeenighed.dk/nyheder/larv... #egeprocessionsspinder #larvenfrahelvede
traeenighed.dk
Inspektion for Egeprocessions­spinderen – Forebyggelse og Bekæmpelse | Træenighed
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Jens-Christian Svenning @jcsvenning.bsky.social · 10/07/2026
4/5: Jeg tænker det er lige ud af landevejen stille og roligt at lære af, hvad man gør i vores sydlige nabolande i de tilfælde, hvor der er en særlig problematik i nogle byområder. Og der er faktisk kommet en Ok artikel på DR on det: www.dr.dk/nyheder/indl... #egeprocessionsspinder #larvenfrahelvede
dr.dk
Holland kæmpede allerede med 'larven fra helvede' for flere år siden - her er ekspertens råd
Egeprocessionsspindere kan bekæmpes på flere fronter. Men vi slipper aldrig helt af med dem, siger en biolog fra Holland, hvor larven i længere tid har generet.
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Jens-Christian Svenning @jcsvenning.bsky.social · 10/07/2026
3/5: Og det afholder jo så heller ikke folk fra DK i massevis i at holde sommerferie i Tyskland, Frankrig mm. (foto fra en.wikipedia.org/wiki/French_...)
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Jens-Christian Svenning @jcsvenning.bsky.social · 10/07/2026
2/5: Arten er vidt udbredt i Syd- og Mellemeuropa - og selvom den er træls at komme i nærkontakt med, så afholder det jo ikke folk fra at leve normalt, gå tur, lufte hund, tørre tøj udenfor - og det fører heller ikke til massefældning af egetræer🌳
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Jens-Christian Svenning @jcsvenning.bsky.social · 10/07/2026
1/5: Hej danske medier - kan vi lige stoppe agurketids-hysteriet om #egeprocessionsspinder = "Larven fra helvede"). Herunder lidt perspektivering & praktisk info➡️ #larvenfrahelvede (Foto fra Wikipedia's udmærkede tyske side om arten)
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Jens-Christian Svenning @jcsvenning.bsky.social · 09/07/2026
I expect so - many ideas!!
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Sean Pang @seh-pang.bsky.social · 09/07/2026
Yesterday we shared the paper. Today I want to share the story behind it. We thought it was all about climate change. Then the models failed. That failure eventually led us to disturbances, and to a very different view of Europe’s flora. Read it @ communities.springernature.com/posts/europe...
communities.springernature.com
Europe’s flora is living in a landscape out of Equilibrium
99% of plant distributions in Europe show signs of disequilibrium. The surprise? Climate change was only part of the story. Disturbance emerged as an even more pervasive force shaping where species oc...
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Jens-Christian Svenning @jcsvenning.bsky.social · 09/07/2026
Oh, please no - eg see nsojournals.onlinelibrary.wiley.com/doi/10.1002/...
nsojournals.onlinelibrary.wiley.com
A graduated nativeness definition for overcoming dilemmas and difficulties of vascular plant species
Nativeness is a concept central to biodiversity conservation and invasion biology, but there are several problems related to a classic binary nativeness definition. Dilemmas arise from the dynamic na....
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Jens-Christian Svenning @jcsvenning.bsky.social · 08/07/2026
Such a beautiful species! I also noticed several ±unexpected ones, under trees/shrubs in our garden the other day
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Jens-Christian Svenning @jcsvenning.bsky.social · 08/07/2026
Fine-grained plant species distributions across Europe are strongly shaped by disturbance regimes - and by short-term #climatechange lags (in addition to long-term lags); see our new study in @natecoevo.nature.com 🌿🌼🌍 Thx @seh-pang.bsky.social for leading #macroecology #vegetation #plants #eccb2026
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Jens-Christian Svenning @jcsvenning.bsky.social · 08/07/2026
Looking forward to our symposium on recovery, #restoration & #rewilding at #ECCB2026 later today (16:30, C1)
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KinarNicholas.bsky.social @kinarnicholas.bsky.social · 08/07/2026
Hydrology Paper of the Day @jcsvenning.bsky.social on the causes of 50,000 years of extinctions: evidence for human influences on the environment and hydrological cycles; geographical patterns and processes; ecosystem stability and the loss of large-bodied species; and examining gaps in knowledge.
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Nature Ecology & Evolution @natecoevo.nature.com · 07/07/2026
Analysis based on over 1 million vegetation plots across Europe shows that disturbance explains range disequilibrium and whether species can occupy landscapes with suitable climate www.nature.com/articles/s41... @seh-pang.bsky.social @jcsvenning.bsky.social @econovoau.bsky.social
nature.com
Disturbance regimes drive widespread plant range disequilibrium in Europe alongside climate change - Nature Ecology & Evolution
Ecological constraints may prevent species from occupying potentially suitable areas. Here the authors show that disturbance is a widespread predictor of range disequilibrium in the vascular flora of ...
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Jens-Christian Svenning @jcsvenning.bsky.social · 07/07/2026
Much talk about ecosystem integrity at #ECCB2026 - imo #ecosystemintegrity should be redefined to not focus on fixed reference states BUT rather on general functionality for species diversity + large-scale persistence of long-resident lineages🌿🐎 onlinelibrary.wiley.com/doi/10.1111/... #restoration
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Jens-Christian Svenning @jcsvenning.bsky.social · 07/07/2026
➡️More info here candidate.hr-manager.net/ApplicationI...
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Jens-Christian Svenning @jcsvenning.bsky.social · 07/07/2026
📢 We’re hiring at Aarhus University! Tenure-track or permanent on vertebrate-driven #ecosystem processes, especially large #mammals w/in @econovoau.bsky.social's strong interdisciplinary environment spanning #ecology, paleoecology, biodiversity science & global change biology 🦬🌿🌍 ➡️More info below
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KinarNicholas.bsky.social @kinarnicholas.bsky.social · 07/07/2026
Hydrology Paper of the Day @mattkerr.bsky.social @andrewabraham.bsky.social on the concept of ecological novelty: biotic, abiotic and social processes; species composition in the context of functionality; human perceptions and metrics; and representation of synthesis for baselines.
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Jens-Christian Svenning @jcsvenning.bsky.social · 06/07/2026
Sorry - I don't think so
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Jens-Christian Svenning @jcsvenning.bsky.social · 06/07/2026
Looking forward to speaking at #ECCB2026 in Leiden! My talk: Trophic rewilding as a key restoration approach Symposium: Ecosystem recovery, #restoration and rewilding 🐎🌿🌼🐗🦬 ➡️ Wed 8 July, 16:30–18:00, Room C1 #Rewilding #RestorationEcology
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Jens-Christian Svenning @jcsvenning.bsky.social · 04/07/2026
#EcosystemIntegrity #ECCB2026 #SERE2026 #restoration 🌿🐎
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Alan McElligott @amcell.bsky.social · 03/07/2026
2026. A 2100‐km jaguar journey redefines mobility and large‐scale conservation priorities during large carnivore dispersal. esajournals.onlinelibrary.wiley.com/doi/full/10....
static.klipy.com
Jaguar Hunt
ALT: Jaguar Hunt
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PLOS Climate @plosclimate.org · 02/07/2026
In a major new Essay, Manuel Esperon-Rodriguez and colleagues call for a reframing of urban forests as essential living infrastructure embedded in legal, financial and planning frameworks to deliver cooler, healthier, more biodiverse and socially just cities. journals.plos.org/climate/arti...
journals.plos.org
Rethinking urban forests as essential infrastructure for resilience, equity, and biodiversity in the current climate emergency
Urban forests are not merely green amenities; they support critical ecosystem functioning and services vital for healthy, resilient cities. Recognising urban forests as core infrastructure is essentia...
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Jens-Christian Svenning @jcsvenning.bsky.social · 02/07/2026
Yet, further support for the already very clear link between people and the late-Quaternary #megafauna #extinctions - see our review www.cambridge.org/core/journal... 🦣🐘👣
cambridge.org
The late-Quaternary megafauna extinctions: Patterns, causes, ecological consequences and implications for ecosystem management in the Anthropocene | Cambridge Prisms: Extinction | Cambridge Core
The late-Quaternary megafauna extinctions: Patterns, causes, ecological consequences and implications for ecosystem management in the Anthropocene - Volume 2
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Jens-Christian Svenning @jcsvenning.bsky.social · 02/07/2026
Earliest Americans specialized in #megafauna hunting from Alaska to South America, analysis of 50 sites reveals - earliest Native Americans had highly specialized diets, targeting the largest animals consistentlyhttps://phys.org/news/2026-07-earliest-americans-specialized-megafauna-alaska.html
phys.org
Earliest Americans specialized in megafauna hunting from Alaska to South America, analysis of 50 sites reveals
New research led by a University of Alaska Fairbanks archaeologist reveals that the earliest Native Americans had highly specialized diets, primarily hunting the largest animals on the landscape, and ...
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🍁 Alex Smith 🍁 @alexsmithants.bsky.social · 29/06/2026
🧪🧵 🪰 🐜🪲🐞🦗🐛🦋🪳🦟 How many species of insect are there?  A seemingly simple question, but one that has been 'bugging' scientists for years.  Our work out today suggests that there are millions more than we had previously expected.  doi.org/10.1073/pnas... @gdfcf.bsky.social
This photo was taken in Area de Conservacion GuanacasteThis microgastrine wasp was named by co-author Jose Fernandez-Triana in honour of Costa Rican parataxonomist Roberto Espinoza in recognition of his contribution to understanding the plant biology of ACG.  The species is Snellenius robertoespinozai.  The image is Creative Commons Attribution License (CC BY 4.0) so can reused provided the original author (Jose Fernandez-Triana) and the source are properly cited.  The source is: Fernandez-Triana JL, Whitfield JB, Smith MA, Kula RR, Hallwachs W, Janzen DH (2015) Revision of the genera Microplitis and Snellenius (Hymenoptera, Braconidae, Microgastrinae) from Area de Conservacion Guanacaste, Costa Rica, with a key to all species previously described from Mesoamerica. Deutsche Entomologische Zeitschrift 62(2): 137-201. https://doi.org/10.3897/dez.62.5276image of a Malaise trap in Area de Conservacion Guanacaste
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Jens-Christian Svenning @jcsvenning.bsky.social · 27/06/2026
Nice feature by @jdtonkin.bsky.social on my proposal to rethink #ecosystemintegrity from a focus on match to static references to functionality for biodiversity and regional persistence of long-resident lineages - to allow to work more constructively with our Anthropocene biosphere 🌿♨️🌍 #restoration
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Johannes Kasper @herzkasper.bsky.social · 23/06/2026
Thank you for the inspiring keynote at the 68. Annual #IAVS Conference! @jcsvenning.bsky.social @iavs5.bsky.social @iavs-young-sci.bsky.social
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Jens-Christian Svenning @jcsvenning.bsky.social · 23/06/2026
Thank you so much :)
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Jens-Christian Svenning @jcsvenning.bsky.social · 22/06/2026
#IAVS2026 #IAVS #vegetation 🌿
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Jens-Christian Svenning @jcsvenning.bsky.social · 22/06/2026
Defining the Anthropocene as a geological epoch captures human impacts’ triphasic nature to empower science and action www.cell.com/one-earth/fu...
cell.com
Defining the Anthropocene as a geological epoch captures human impacts’ triphasic nature to empower science and action
Defining an Anthropocene epoch from the mid-1900s allows representing human environmental impacts’ triphasic nature within the International Geological Timescale. Such an epoch captures humanity’s cur...
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