Han Olff

@hanolff.bsky.social

1.1K followers 90 following 41 posts

Professor of Ecology
University of Groningen
Restoration, Savannah, Biodiversity

Videos

Environmental science 59%

Geography 16%

Posts Replies Media Videos

Pinned

Han Olff @hanolff.bsky.social · Dec 21

🌍🌱🐦🦌 Join the CurveBend Project! We're hiring 8 PhDs and 2 Postdocs to promote biodiversity restoration and a nature-positive future through collective action at the landscape scale in NL, AR, KE and TZ. Excited to make an impact? Contact us now! shorturl.at/nOdhb #PhDpositions #PostdocJobs

CurveBend Vacancies

CurveBend project: Upcoming vacancies for 8 PhD students and 2 postdocs We are looking for people who are excited to investigate how to restore biodiversity and promote a nature-positive society throu...

shorturl.at

Han Olff @hanolff.bsky.social · Apr 22

New paper out led by Vera Thijssen of @unigroningen.bsky.social : Advancing the mapping of vegetation structure in savannas using Sentinel-1 imagery #Serengeti #Mara #savanna #conservation zslpublications.onlinelibrary.wiley.com/doi/10.1002/...

Advancing the mapping of vegetation structure in savannas using Sentinel‐1 imagery

As vegetation structure monitoring is important for the understanding and conservation of savanna ecosystems, we explored the utility of C-band synthetic aperture radar imagery for mapping both grass...

zslpublications.onlinelibrary.wiley.com

Reposted by Sonia I. Seneviratne, Pierre Friedlingstein, Larry W. Horowitz , and 23 more Sonia I. Seneviratne, Pierre Friedlingstein, Larry W. Horowitz, Simon L. Lewis, Johannes Quaas, Arthur Geßler, Norbert Marwan, Dylan B. Millet, Han Olff, Gerhard Krinner, Jingfeng Xiao, Thomas Karl, Colette L. Heald, Delphine K. Farmer, Matthias Cuntz, Erik Voeten, François Gemenne, Brian Medeiros, Jérôme Denis, Cailin O’Connor, Jennifer A. Johnson, Michael Westphal, Stefan Kirchner, Raphaël Soubeyran, Dirk Nikolaus Karger, Álvaro Gaytán

Paul Voosen @voosen.me · Apr 11

BREAKING from @science.org: The Trump admin is seeking to kill nearly all climate research at NOAA, its climate science agency.

Its near-final budget proposal would end all NOAA research labs, academic institutes, and regional climate centers. And it wants to fully end the NOAA Research division.

Trump seeks to end climate research at premier U.S. climate agency

White House aims to end NOAA’s research office; NASA also targeted

www.science.org

Han Olff @hanolff.bsky.social · Jan 19

Join the CurveBend Project! We're hiring 8 PhDs and 2 Postdocs to promote biodiversity restoration in 4 countries worldwide - positions open for application until 13-Feb-2025

Han Olff @hanolff.bsky.social · Dec 21

CurveBend Vacancies

shorturl.at

Reposted by Han Olff

Caring Farmers @caringfarmers.bsky.social · Jan 12

3600 kalveren in Nederland uit Duitse regio met #MKZ besmetting. Gesleep met dieren, betekent ook gesleep met ziektes... nos.nl/artikel/2551...

Duizenden kalveren in Nederland uit Duitse deelstaat met MKZ-besmetting

Sinds 1 december zijn zeker 3600 kalveren naar Nederland gekomen vanuit de Duitse deelstaat Brandenburg, schrijft minister Wiersma in een brief aan de Kamer.

nos.nl

Reposted by Han Olff

Dr Charlie Gardner @charliejgardner.bsky.social · Jan 11

1/ I'm constantly amazed at the naivety of so much of conservation science (& other mission-driven disciplines)

As if all we have to do is generate the evidence and society's leaders will use it to do what's needed

As if there's no-one trying to make sure that doesn't happen

Reposted by Han Olff

Stadsnatuur 🐝 @natuurindestad.bsky.social · Jan 9

🐝Doe mee met onderzoek naar gif in bijen🐝
Wat doen pesticiden met onze wilde bijen? Dat onderzoeken de Bijenstichting en Pesticide Action Network Netherlands. En daar hebben ze jouw hulp bij nodig (1/2)👇🏾

Reposted by Han Olff

ARK Rewilding Nederland @ark-rewildingnl.bsky.social · Jan 9

Hé, pssst, we zoeken een collega voor de natte leembossen in het Brabantse arkrewilding.nl/nieuws/2025/...

Vacature projectmedewerker Het Groene Woud

Voor gebiedsprogramma Het Groene Woud zoekt ARK een projectmedewerker natuurontwikkeling (4 - 5 dagen per week).

arkrewilding.nl

Reposted by Han Olff

ARK Rewilding Nederland @ark-rewildingnl.bsky.social · Jan 9

arkrewilding.nl/nieuws/2025/... Het werk van ARK op de Noordzee heeft alleen zin als er voldoende rust en ruimte is. Daarom eist ARK, met St Doggerland, dat de overheid zich aan haar eigen regels gaat houden: het Nederlandse deel van de Doggersbank moet op slot voor sleepnetvisserij.

Doggerland en ARK stappen naar de rechter voor rust en ruimte op de Doggersbank

Doggerland en ARK stappen naar de rechter voor bescherming van de Doggersbank: een natuurgebied in de Noordzee. Bodemrust is essentieel voor de natuur daar.

arkrewilding.nl

Reposted by Han Olff

University of Groningen | Rijksuniversiteit Groningen @rug.nl · Jan 9

Vikingzwaarden, journalistieke scoops en cholera: de RUG-Geodienst bestaat 10 jaar! 🎈

Hun posts gaan regelmatig viraal op sociale media: 'We vallen op via deze kanalen, en daardoor weten ook journalisten ons te vinden.' 💡

Lees meer en bekijk prachtige voorbeelden 👇
www.rug.nl/about-ug/lat...

Reposted by Han Olff

Martin Beal @amigodeaves.bsky.social · Jan 9

New paper! @jappliedecology.bsky.social
https://bit.ly/3C5gYJp
We mapped out the migrations of over 10K ind ⚫-tailed godwits (!) to characterize connectivity between sites in Europe and Africa.
We compiled tracking data, ring recoveries and resightings: >400K records in total! (1/5)

Han Olff @hanolff.bsky.social · Jan 8

Reposted by Han Olff

George Monbiot @georgemonbiot.bsky.social · Jan 8

True to its long history of exploitation and obfuscation, Meta makes it as hard as possible to delete your Facebook account. It keeps changing the procedure. In some cases it directs you to the wrong tabs. But this video by Gauging Gadgets provides a simple guide. www.youtube.com/watch?v=HZIJ...

How to Delete Facebook Account Permanently on Desktop, Laptop, Mac, or Chromebook

YouTube video by Gauging Gadgets

www.youtube.com

Reposted by Han Olff

Jan Wanink @janwanink.bsky.social · Jan 8

Experimental evidence of the role of nitrogen for eutrophication in shallow lakes: a long-term climate effect mesocosm study

Erik Jeppesen, Hu He, Martin Søndergaard, Torben L. Lauridsen, Thomas A. Davidson, Eti E. Levi & Mark J. McCarthy

Experimental evidence of the role of nitrogen for eutrophication in shallow lakes: A long-term climate effect mesocosm study

The effectiveness of controlling nitrogen (N) loading (in addition to phosphorus [P]) to manage the eutrophication of aquatic ecosystems has been debated despite the role of N in producing algal biomass and toxins. Long-term, controlled tests of the efficacy of N loading reductions are largely missing from the scientific record, perhaps due to the historical focus on P control. To address this knowledge gap, we examined the results from a unique, long-term study conducted in 24 flow-through (2.5-month retention time) lake ecosystem-scale mesocosms in Denmark, operating since 2003 at two contrasting nutrient loading levels crossed with three temperature scenarios (ambient, IPCC (Intergovernmental Panel on Climate Change) A2 scenario, and A2+50%).

www.cell.com

Reposted by Han Olff

Claes de Vreese @claesdevreese.bsky.social · Jan 6

Bye X 👋🏼

Dutch science foundation NWO drops X.

Reason: “public discourse on X is increasingly characterized by the spread of misinformation and hate speech”

NWO will use their website, newsletter and LinkedIn for announcements.

#AcademicSky

www.nwo.nl/en/news/nwo-...

NWO stops using social media platform X | NWO

NWO will stop using the social media platform X (formerly Twitter) as of January 6, 2025. This decision follows a thorough evaluation of how the platform aligns with NWO's core values and responsibili...

www.nwo.nl

Reposted by Han Olff, Carlos P. Carmona, Guillermo Fandós

Jens-Christian Svenning @jcsvenning.bsky.social · Jan 6

🚨Postdoc Opportunity in Human Macroecology🌍Join @econovoau.bsky.social at @aarhusuni.bsky.social to study human #macroecology from a functional #trait perspective, in #archaeology + #ecology team led by @felixthehauskat.bsky.social👣
🗓️Deadline: Jan 31, 2025
👉Apply: international.au.dk/about/profil...

2-yr postdoc on human macroecology in a functional trait perspective Aarhus University - Vacancy at Aarhus University

Vacancy at School of Culture and Society - Department of Heritage Studies, Aarhus University

international.au.dk

Reposted by Han Olff

Jens-Christian Svenning @jcsvenning.bsky.social · Jan 6

Oysters once crowded Europe's coast—here's how researchers discovered these long-forgotten reefs 🦪🦪🦪 phys.org/news/2025-01... #marinebiology #oysters #shiftingbaseline

Oysters once crowded Europe's coast—here's how researchers discovered these long-forgotten reefs

Six generations ago, Europe's seas possessed vast oyster reefs. Oysters were found in their millions, clustered together in reef systems that spanned hundreds of square kilometers. Now the reefs are g...

phys.org

Han Olff @hanolff.bsky.social · Jan 5

New study led by Sidi Yahya Lemrabott finds concerningly high rates of bycatch of critically threatened sharks & rays in artisanal fisheries in West Africa's unique Banc d'Arguin ecosystem. 🌍🦈 Read more: onlinelibrary.wiley.com/doi/10.1111/... #SharkConservation #Bycatch #MarineBiodiversity

Han Olff @hanolff.bsky.social · Jan 3

De referentie naar het stikstof kaartje bedoelden de schrijvers denk ik niet als 'up to date info'. Ze gebruikten het als illustratie van hoe duidelijke ruimtelijke keuzen en afwegingen 'besmet' zijn verklaard in het publiek debat, ondergesneeuwd onder zaken als plattelandsidentiteit

Han Olff @hanolff.bsky.social · Jan 3

Per definitie gaat discussie over verdeling van schaarse ruimte over alles wat ruimte in neemt, dus ook over luchtvaart.

Han Olff @hanolff.bsky.social · Jan 3

Prima analyse van @bosdaan.bsky.social en Wouter Ubink: het gaat over de schaarse ruimte in Nederland, waardoor echte langetermijn keuzes steeds sneuvelen in debatten die de politiek vooral langs lijnen van economie en identiteit wil voeren

Reposted by Han Olff

Society for Conservation Biology @society4conbio.bsky.social · Jan 2

A third of the world’s sharks, rays and chimaeras are threatened with extinction, and their numbers have dwindled since 1970, finds a new IUCN report and a study. 🌍
#MarineLife #conservation #ecology
news.mongabay.com/2025/01/new-...

New evidence spells massive trouble for world’s sharks, rays and chimaeras

Evolution has perfected the world’s sharks and rays for more than 420 million years. Unlike the ammonites or pterosaurs that they once shared the oceans with, sharks and rays persevered through five m...

news.mongabay.com

Reposted by Han Olff, Andreas Schweiger, Rubén G. Mateo , and 1 more Han Olff, Andreas Schweiger, Rubén G. Mateo, Guillermo Fandós

Jens-Christian Svenning @jcsvenning.bsky.social · Jan 2

Check our two open PhD positions in #ecology at @econovoau.bsky.social www.linkedin.com/posts/svenni... (note - as always in #Denmark - these positions come w/ full academic salaries) 🐎🍃🌎🌤️ #megafauna #vegetation #wildhorse #modelling

Jens-Christian Svenning on LinkedIn: #modeling #wildhorses #wilderness #herbivores #ecosystems #ecology…

📢 Exciting PhD Opportunities in Ecology & Biodiversity! 🌍 Are you passionate about understanding and shaping the future of ecosystems? At Center for…

www.linkedin.com

Han Olff @hanolff.bsky.social · Dec 31

Sounds like what one would write now, but from Chaplin's famous monologue in his 1940 film The Great Dictator. Quoted in Paolo Nutini's song Iron Sky

Reposted by Han Olff

depths of wikipedia @depthsofwikipedia.bsky.social · Dec 31

btw you can check the website WikiShootMe for nearby landmarks that need freely-licensed photos, visit them, and then snap pics for Wikipedia/Wikimedia Commons! it's so fun and the list of photoless destinations is endless. I chose this movie theater as an example bc it's where I first watched Cars

Reposted by Han Olff, Fernanda Alves

Dr Rachel Hale Marine Biologist @seafloorscience.bsky.social · Dec 31

Happy New Year from invertebrates that look like fireworks.

Credits
Jellyfish: OET/Nautilus Live
Anemone: Cathy Lewis
Feather duster worm: Pauline Walsh Jacobsen
Octopus: Schmidt Ocean Institute

A round jellyfish with glowing golden stripes on the bell and long tendril tentacles against a background of deep sea sediment.

An anemone with many white thin tentacles

A close up into the centre of a feather duster worm with radiating striped white and brown tentacles

A semi-translucent octopus with a spotted mantle and blue tentacles.

Reposted by Han Olff

PAISAJE lab @paisaje-lab.bsky.social · Dec 29

Many light-demanding European woody plants are thorny or have prickly leaves, making them common in landscapes inhabited by large herbivores (livestock). Many of these species are dispersed by frugivorous birds associated with open habitats

Starling & Blackthorn (Sloe)

📸 Nature Picture Library

Reposted by Han Olff

Jim van Belzen @jimvanbelzen.bsky.social · Dec 23

Met een simpele opstelling met tuinkers en Lego Duplo in een aquarium kun je het nut van begroeide oevers voor kustbescherming gemakkelijk demonstreren.

#NaturebasedSolutions #waterveiligheid

(met dank aan mijn collega's aan @uantwerpen.bsky.social voor het maken van dit filmpje)

Reposted by Han Olff

Dave Goulson @davegoulson.bsky.social · Dec 23

www.songbird-survival.org.uk/post/news-to...

Toxic neonicotinoid pesticides ban will help songbird crisis

Toxic neonicotinoid pesticides ban will help songbird crisis From SongBird Survival, your voice for songbirds and other small birds in the UK, a specialist charity.

www.songbird-survival.org.uk

Reposted by Han Olff

Johan Vollenbroek @stichtingmobilisation.nl · Dec 22

Als er iemand is die weet wat de visie is van BBB op de landbouw in Nederland anno 2030-2035 is dan horen we dat graag. Er is een langetermijnvisie nodig waarin boeren en natuur elkaar versterken. Hierbij de visie van MOB, zie ook onze website
www.youtube.com/watch?v=d-r6...

Grond voor een gesprek - visie op duurzaam landgebruik in Nederland

YouTube video by urgenda

Light upyour news

Sign in to Lightnews

Sign up to start reading

Connect Bluesky

Connect with Bluesky

Light up
your news